1
|
Zuchowska A, Kasprzak A, Dabrowski B, Kaminska K, Poplawska M, Brzozka Z. Nanoconjugates of graphene oxide derivatives and meso-tetraphenylporphyrin: a new avenue for anticancer photodynamic therapies – Cell-on-a-Chip analysis. NEW J CHEM 2020. [DOI: 10.1039/d0nj04189k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Cell-on-a-Chip analysis of nanoconjugates of graphene oxide derivatives and mesotetraphenylporphyrin as a new selective and effective avenue for anticancer photodynamic therapies.
Collapse
Affiliation(s)
- A. Zuchowska
- Chair of Medical Biotechnology
- Warsaw University of Technology
- Faculty of Chemistry
- Warsaw University of Technology
- Poland
| | - A. Kasprzak
- Chair of Medical Biotechnology
- Warsaw University of Technology
- Faculty of Chemistry
- Warsaw University of Technology
- Poland
| | - B. Dabrowski
- Chair of Medical Biotechnology
- Warsaw University of Technology
- Faculty of Chemistry
- Warsaw University of Technology
- Poland
| | - K. Kaminska
- Chair of Medical Biotechnology
- Warsaw University of Technology
- Faculty of Chemistry
- Warsaw University of Technology
- Poland
| | - M. Poplawska
- Chair of Medical Biotechnology
- Warsaw University of Technology
- Faculty of Chemistry
- Warsaw University of Technology
- Poland
| | - Z. Brzozka
- Chair of Medical Biotechnology
- Warsaw University of Technology
- Faculty of Chemistry
- Warsaw University of Technology
- Poland
| |
Collapse
|
2
|
Goian V, Kadlec F, Kadlec C, Dabrowski B, Kolesnik S, Chmaissem O, Nuzhnyy D, Kempa M, Bovtun V, Savinov M, Hejtmánek J, Prokleška J, Kamba S. Spectroscopic studies of the ferroelectric and magnetic phase transitions in multiferroic Sr1-xBaxMnO3. J Phys Condens Matter 2016; 28:175901. [PMID: 27023160 DOI: 10.1088/0953-8984/28/17/175901] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Dielectric response of perovskite Sr1-xBaxMnO3 (x = 0.43 and 0.45) ceramics was investigated using microwave, THz and infrared spectroscopic techniques in order to study the ferroelectric and antiferromagnetic phase transitions with critical temperatures TC ≈ 350 K and TN ≈ 200 K, respectively. The two lowest-frequency polar phonons are overdamped above TN and they exhibit pronounced softening on heating towards TC. Nevertheless, permittivity ε' in the THz range shows only a small anomaly at TC because the phonon contribution to ε' is rather small. The phonons are coupled with a central mode which provides the main contribution to the dielectric anomaly at TC. Thus, the ferroelectric phase transition has characteristics of a crossover from displacive to order-disorder type. At the same time, the intrinsic THz central peak is partially screened by conductivity and related Maxwell-Wagner relaxation, which dominates the microwave and lower-frequency spectra. Below TN, the ferroelectric distortion markedly decreases, which has an influence on the frequencies of both the central and soft modes. Therefore, ε' in the THz range increases at TN on cooling. In spite of the strong spin-phonon coupling near TN, surprisingly no magnetodielectric effect was observed in the THz spectra upon applying magnetic field of up to 7 T, which is in contradiction with the theoretically expected huge magnetoelectric coupling. We explain this fact as due to the insensitivity of TN to magnetic field.
Collapse
Affiliation(s)
- V Goian
- Institute of Physics, The Czech Academy of Sciences, Na Slovance 2,182 21 Prague, Czech Republic
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
3
|
Baszczuk A, Dabrowski B, Avdeev M. High temperature neutron diffraction studies of PrInO3 and the measures of perovskite structure distortion. Dalton Trans 2015; 44:10817-27. [PMID: 25760430 DOI: 10.1039/c4dt03881a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The crystal structure of PrInO(3) was investigated in the temperature range 303-1123 K by high-resolution neutron-powder diffraction. The PrInO(3) adopts a highly distorted variant of the perovskite structure with the orthorhombic Pnma space group in the whole temperature range investigated. The bond length and bond-angle analysis revealed a very slow tendency to decrease structural distortion with increasing temperature. Comparison of different parameters quantifying perovskite structure distortion calculated for PrInO(3) and the similar PrAlO(3) and PrGaO(3) shows the advantage of using the tolerance factor t12 calculated for the 12-fold coordinated Pr by geometrical averaging of the individual interatomic distances. An additional advantage of the tolerance factor method results from the possibility of extending it to predict the average structural distortion and the geometrical stability of the perovskites at various temperatures once the accurate dependence of t(x,T,d) on the composition, temperature and oxygen content is found. By comparing PrInO(3) with several AMO(3) perovskites containing ions in the fixed oxidation state on the A and M crystal sites it was found that structural distortion and the tolerance factor t12 for PrInO(3) are consistent with the empirical thermal expansion coefficient based on the bond strength calculation [R. M. Hazen, and C. T. Prewitt, Am. Mineral., 1977, 62(3-4), 309]. In contrast to perovskites AMO(3-d) containing mixed-valent M ions, which allow for a wide range of changes of the tolerance factor t(12)(T,d) as a function of oxygen content, perovskites AMO(3) with M ions in the fixed oxidation state show much less flexibility. This flexibility is further reduced for the A(3+)M(3+)O(3) perovskites like PrInO(3) for which even a large change of the synthesis temperature has a minor effect on controlling the resulting t(12)(T) and the structural phase in comparison with A(2+)M(4+)O3 perovskites. The only parameter left for A(3+)M(3+)O(3) materials allowing formation of various perovskites and hexagonal phases is the total pressure, which may significantly change t(12)(T,P).
Collapse
Affiliation(s)
- A Baszczuk
- Wroclaw University of Technology, Department of Mechanics, Materials Science and Engineering, 50-370 Wroclaw, Poland.
| | | | | |
Collapse
|
4
|
Abughayada C, Dabrowski B, Avdeev M, Kolesnik S, Remsen S, Chmaissem O. Structural, magnetic, and oxygen storage properties of hexagonal Dy1−xYxMnO3+δ. J SOLID STATE CHEM 2014. [DOI: 10.1016/j.jssc.2014.05.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
5
|
Klie RF, Qiao Q, Paulauskas T, Gulec A, Rebola A, Öğüt S, Prange MP, Idrobo JC, Pantelides ST, Kolesnik S, Dabrowski B, Ozdemir M, Boyraz C, Mazumdar D, Gupta A. Observations of Co4+ in a higher spin state and the increase in the Seebeck coefficient of thermoelectric Ca3Co4O9. Phys Rev Lett 2012; 108:196601. [PMID: 23003068 DOI: 10.1103/physrevlett.108.196601] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Indexed: 06/01/2023]
Abstract
Ca3Co4O9 has a unique structure that leads to exceptionally high thermoelectric transport. Here we report the achievement of a 27% increase in the room-temperature in-plane Seebeck coefficient of Ca3Co4O9 thin films. We combine aberration-corrected Z-contrast imaging, atomic-column resolved electron energy-loss spectroscopy, and density-functional calculations to show that the increase is caused by stacking faults with Co4+-ions in a higher spin state compared to that of bulk Ca3Co4O9. The higher Seebeck coefficient makes the Ca3Co4O9 system suitable for many high temperature waste-heat-recovery applications.
Collapse
Affiliation(s)
- R F Klie
- Department of Physics, University of Illinois at Chicago, Chicago, Illinois, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Chakhalian J, Rondinelli JM, Liu J, Gray BA, Kareev M, Moon EJ, Prasai N, Cohn JL, Varela M, Tung IC, Bedzyk MJ, Altendorf SG, Strigari F, Dabrowski B, Tjeng LH, Ryan PJ, Freeland JW. Asymmetric orbital-lattice interactions in ultrathin correlated oxide films. Phys Rev Lett 2011; 107:116805. [PMID: 22026694 DOI: 10.1103/physrevlett.107.116805] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Indexed: 05/23/2023]
Abstract
Using resonant x-ray spectroscopies combined with density functional calculations, we find an asymmetric biaxial strain-induced d-orbital response in ultrathin films of the correlated metal LaNiO3 which are not accessible in the bulk. The sign of the misfit strain governs the stability of an octahedral "breathing" distortion, which, in turn, produces an emergent charge-ordered ground state with an altered ligand-hole density and bond covalency. Control of this new mechanism opens a pathway to rational orbital engineering, providing a platform for artificially designed Mott materials.
Collapse
Affiliation(s)
- J Chakhalian
- Department of Physics, University of Arkansas, Fayetteville, Arkansas 70701, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Gateshki M, Suescun L, Kolesnik S, Mais J, Dabrowski B. Structural and magnetic study of RFe0.5V0.5O3 (R=Y, Eu, Nd, La) perovskite compounds. J SOLID STATE CHEM 2011. [DOI: 10.1016/j.jssc.2011.06.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
8
|
Suescun L, Dabrowski B. A new homologous series of oxygen vacancy ordered strontium manganese perovskite. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311097650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
9
|
Qiao Q, Gulec A, Paulauskas T, Kolesnik S, Dabrowski B, Ozdemir M, Boyraz C, Mazumdar D, Gupta A, Klie RF. Effect of substrate on the atomic structure and physical properties of thermoelectric Ca₃Co₄O₉ thin films. J Phys Condens Matter 2011; 23:305005. [PMID: 21719960 DOI: 10.1088/0953-8984/23/30/305005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The incommensurately layered cobalt oxide Ca(3)Co(4)O(9) exhibits an unusually high Seebeck coefficient as a polycrystalline bulk material, making it ideally suited for many high temperature thermoelectric applications. In this paper, we investigate properties of Ca(3)Co(4)O(9) thin films grown on cubic perovskite SrTiO(3), LaAlO(3), and (La(0.3)Sr(0.7))(Al(0.65)Ta(0.35))O(3) substrates and on hexagonal Al(2)O(3) (sapphire) substrates using the pulsed laser deposition technique. X-ray diffraction and transmission electron microscopy analysis indicate strain-free growth of films, irrespective of the substrate. However, depending on the lattice and symmetry mismatch, defect-free growth of the hexagonal CoO(2) layer is stabilized only after a critical thickness and, in general, we observe the formation of a stable Ca(2)CoO(3) buffer layer near the substrate-film interface. Beyond this critical thickness, a large concentration of CoO(2) stacking faults is observed, possibly due to weak interlayer interaction in this layered material. We propose that these stacking faults have a significant impact on the Seebeck coefficient and we report higher values in thinner Ca(3)Co(4)O(9) films due to additional phonon scattering sites, necessary for improved thermoelectric properties.
Collapse
Affiliation(s)
- Q Qiao
- Department of Physics, University of Illinois at Chicago, Chicago, IL, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Remsen S, Dabrowski B, Chmaissem O, Mais J, Szewczyk A. Synthesis and oxygen content dependent properties of hexagonal DyMnO3+δ. J SOLID STATE CHEM 2011. [DOI: 10.1016/j.jssc.2011.06.037] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
11
|
|
12
|
Hinks DG, Dabrowski B, Zhang K, Segre CU, Jorgensen JD, Soderholm L, Beno MA. Neutron Diffraction Studies of High TC Superconductors. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-99-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTWe have investigated the structure and composition of La2CuO4 (both pure and Sr-doped) and Nd(Ba2−xNdx)Cu3O7 using powder neutron diffraction. In La2−xSrxCuO4, Tc reacnes its maximum at x=0.15, after which vacancies are introduced in the 2D planes and superconductivity is destroyed. Superconductivity in La2CuO4 is not bulk. No evidence for nonstoichlometry in this material can be observed. In the Nd(Ba2−xNdx)Cu3O7 system, Tc is a complex function of oxygen ordering and electronic effects.
Collapse
|
13
|
Alp EE, Mini SM, Ramanathan M, Veal BW, Soderholm L, Goodman GL, Dabrowski B, Shenoy GK, Guo J, Ellis DE, Bommanavar A, Hyun OB. Polarized X-Ray Absorption Studies of Oxide Superconductors. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-143-97] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractPolarized X-ray absorption studies have been carried out at the Cu K-edge to study the effect of Sr doping in La2CuO4 and oxygen doping in YBa2Cu3O6+x. These measurements help to elucidate the transitions giving rise to the absorption edges. We offer an explanation of the polarization shifts of features in terms of the results of our embedded cluster calculations of electronic structure.
Collapse
|
14
|
Ogończyk D, Wegrzyn J, Jankowski P, Dabrowski B, Garstecki P. Bonding of microfluidic devices fabricated in polycarbonate. Lab Chip 2010; 10:1324-7. [PMID: 20445888 DOI: 10.1039/b924439e] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A simple method for bonding polycarbonate, based on controlled exposure of the pieces to vapours of solvents, yields a tight seal and unmodified geometry of the channels.
Collapse
Affiliation(s)
- D Ogończyk
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | | | | | | | | |
Collapse
|
15
|
Yelland EA, Singleton J, Mielke CH, Harrison N, Balakirev FF, Dabrowski B, Cooper JR. Quantum oscillations in the underdoped cuprate YBa2Cu4O8. Phys Rev Lett 2008; 100:047003. [PMID: 18352321 DOI: 10.1103/physrevlett.100.047003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2007] [Indexed: 05/26/2023]
Abstract
We report the observation of quantum oscillations in the underdoped cuprate superconductor YBa2Cu4O8 using a tunnel-diode oscillator technique in pulsed magnetic fields up to 85 T. There is a clear signal, periodic in inverse field, with frequency 660+/-15 T and possible evidence for the presence of two components of slightly different frequency. The quasiparticle mass is m(*)=3.0+/-0.3m(e). In conjunction with the results of Doiron-Leyraud et al. for YBa2Cu3O6.5, the present measurements suggest that Fermi surface pockets are a general feature of underdoped copper oxide planes and provide information about the doping dependence of the Fermi surface.
Collapse
Affiliation(s)
- E A Yelland
- H. H. Wills Physics Laboratory, Tyndall Avenue, Bristol BS8 1TL, United Kingdom
| | | | | | | | | | | | | |
Collapse
|
16
|
Pimenov A, Loidl A, Przyslupski P, Dabrowski B. Negative refraction in ferromagnet-superconductor superlattices. Phys Rev Lett 2005; 95:247009. [PMID: 16384416 DOI: 10.1103/physrevlett.95.247009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2005] [Indexed: 05/05/2023]
Abstract
Negative refraction, which reverses many fundamental aspects of classical optics, can be obtained in systems with negative magnetic permeability and negative dielectric permittivity. This Letter documents an experimental realization of negative refraction at millimeter waves, finite magnetic fields, and cryogenic temperatures utilizing a multilayer stack of ferromagnetic and superconducting thin films. In the present case the superconducting YBa2Cu3O7 layers provide negative permittivity while negative permeability is achieved via ferromagnetic (La:Sr)MnO3 layers for frequencies and magnetic fields close to the ferromagnetic resonance. In these superlattices the refractive index can be switched between positive and negative regions using external magnetic field as tuning parameter.
Collapse
Affiliation(s)
- A Pimenov
- Experimentalphysik V, Center for Electronic Correlations and Magnetism, Universität Augsburg, 86135 Augsburg, Germany
| | | | | | | |
Collapse
|
17
|
Dabrowski B, Caspi E, Kolesnik S, Chmaissem O, Mais J, Jorgensen J. Synthesis, structure, and magnetic properties of SrMn1−xGaxO3−δ (x=0–0.5) perovskites. J SOLID STATE CHEM 2005. [DOI: 10.1016/j.jssc.2005.08.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
18
|
Abstract
In order to characterize the spin-spin exchange interactions responsible for the Type-E' antiferromagnetic order in inhomogeneous RNiO3 perovskites (R=Y or rare earth), the pressure dependence of the Néel temperature T(N) was systematically measured for samples with T(N)<T(IM) and T(N)=T(IM); T(IM) is an insulator-metal transition temperature. Analysis of the results shows that, as for superexchange, perturbation theory can be used to describe the interatomic exchange interactions for T(N)<T(IM), but the perturbation theory breaks down where T(N) approaches T(IM).
Collapse
Affiliation(s)
- J-S Zhou
- Texas Materials Institute, University of Texas at Austin, 1 University Station, C2201, Austin, Texas 78712, USA
| | | | | |
Collapse
|
19
|
Zhou JS, Goodenough JB, Dabrowski B. Pressure-induced non-Fermi-liquid behavior of PrNiO3. Phys Rev Lett 2005; 94:226602. [PMID: 16090422 DOI: 10.1103/physrevlett.94.226602] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2004] [Revised: 08/30/2004] [Indexed: 05/03/2023]
Abstract
Comprehensive temperature scans of the resistivity of a high-quality sample of PrNiO3 were made under different pressures up to 30 kbar; they have revealed that the insulator phase is suppressed completely at P approximately equal to 13 kbar, transforming to a non-Fermi-liquid phase in which the resistivity varies as Deltarho=rho(T)-rho(0) approximately T(n) with n=1.33 and 1.60 over a broad pressure range.
Collapse
Affiliation(s)
- J-S Zhou
- Texas Materials Institute, ETC 9.102, University of Texas at Austin, 1 University Station, C2201, Austin, TX 78712, USA
| | | | | |
Collapse
|
20
|
Sato TJ, Lynn JW, Dabrowski B. Disorder-induced polaron formation in the magnetoresistive perovskite La0.54Ba0.46MnO3. Phys Rev Lett 2004; 93:267204. [PMID: 15698018 DOI: 10.1103/physrevlett.93.267204] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2004] [Indexed: 05/24/2023]
Abstract
Neutron studies of the effect of A-site chemical disorder on the ferromagnetic transition and spin dynamics for the magnetoresistive perovskite La0.54Ba0.46MnO3 are reported. The low temperature spin waves reveal that disorder reduces exchange interactions by only 9%. The development of a quasielastic peak in the spectrum below TC and long-time relaxation of the order parameter indicate that the transition is discontinuous in the disordered sample, while it appears continuous for the ordered sample. These results strongly suggest that chemical disorder lowers the energy for polaron formation in manganese perovskites, and is the origin of the dramatic 50 K reduction in TC.
Collapse
Affiliation(s)
- T J Sato
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8562, USA.
| | | | | |
Collapse
|
21
|
Caspi E, Avdeev M, Short S, Jorgensen J, Dabrowski B, Chmaissem O, Mais J, Kolesnik S. Synthesis, structure, and properties of randomly mixed and layer-ordered SrMn1−xGaxO3−δ perovskites. J SOLID STATE CHEM 2004. [DOI: 10.1016/j.jssc.2003.11.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
22
|
Affiliation(s)
- S. Kolesnik
- Department of Physics, Northern Illinois University, DeKalb, IL 60115, USA
| | - B. Dabrowski
- Department of Physics, Northern Illinois University, DeKalb, IL 60115, USA
| | - J. Mais
- Department of Physics, Northern Illinois University, DeKalb, IL 60115, USA
| |
Collapse
|
23
|
|
24
|
|
25
|
Fehér T, Jánossy A, Oszlányi G, Simon F, Dabrowski B, Klamut PW, Horvatić M, Williams GV. Magnetic-field-induced low-energy spin excitations in YBa(2)Cu(4)O(8) measured by high field Gd(3+) electron spin resonance. Phys Rev Lett 2000; 85:5627-5630. [PMID: 11136063 DOI: 10.1103/physrevlett.85.5627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2000] [Indexed: 05/23/2023]
Abstract
We have measured the spin susceptibility, chi(s), of the CuO(2) planes in the underdoped high T(c) superconductor, YBa(2)Cu(4)O(8) by Gd(3+) electron spin resonance (ESR) in single crystals and aligned powders in fields up to 15.4 T. At low temperatures and high fields, chi(s) is enhanced slightly in the B parallel c orientation with respect to the B perpendicular c orientation. The enhancement at 15.4 T (approximately equal to 0.15H(c2)) at 16 K (0.2 T(c)) is small: approximately 10% of chi(s)(T(c)), suggesting that the second critical field of superconductivity, H(c2) approximately equal to 100 T, would not suppress the pseudogap. This work demonstrates the potential of high field ESR in single crystals for studying high T(c) superconductors.
Collapse
Affiliation(s)
- T Fehér
- Institute of Physics, Budapest University of Technology and Economics, P.O. Box 91, H-1521 Budapest, Hungary
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Zhang K, Dabrowski B, Segre CU, Hinks DG, Schuller IK, Jorgensen JD, Slaski M. Solubility and superconductivity in RE(Ba2-xREx)Cu3O7+δsystems (RE=Nd, Sm, Eu, Gd, Dy). ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/20/34/001] [Citation(s) in RCA: 121] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
27
|
Back BB, Baker MD, Barton DS, Basilev S, Bates BD, Baum R, Betts RR, Białas A, Bindel R, Bogucki W, Budzanowski A, Busza W, Carroll A, Ceglia M, Chang YH, Chen AE, Coghen T, Conner C, Czyz W, Dabrowski B, Decowski MP, Despet M, Fita P, Fitch J, Friedl M, Gałuszka K, Ganz R, Garcia E, George N, Godlewski J, Gomes C, Griesmayer E, Gulbrandsen K, Gushue S, Halik J, Halliwell C, Haridas P, Hayes A, Heintzelman GA, Henderson C, Hollis R, Hołyński R, Holzman B, Johnson E, Kane J, Katzy J, Kita W, Kotuła J, Kraner H, Kucewicz W, Kulinich P, LawV C, Lemler M, Ligocki J, Lin WT, Manly S, McLeod D, Michałowski J, Mignerey A, Mülmenstädt J, Neal M, Nouicer R, Olszewski A, Pak R, Park IC, Patel M, Pernegger H, Plesko M, Reed C, Remsberg LP, Reuter M, Roland C, Roland G, Ross D, Rosenberg L, Ryan J, Sanzgiri A, Sarin P, Sawicki P, Scaduto J, Shea J, Sinacore J, Skulski W, Steadman SG, Stephans GS, Steinberg P, Straczek A, Stodulski M, Strek M, Stopa Z, Sukhanov A, Surowiecka K, Tang JL, Teng R, Trzupek A, Vale C, van Nieuwenhuizen GJ, Verdier R, Wadsworth B, Wolfs FL, Wosiek B, Woźniak K, Wuosmaa AH, Wysłouch B, Zalewski K, Zychowski P. Charged-particle multiplicity near midrapidity in central Au+Au collisions at sqrt[SNN]=56 and 130 GeV. Phys Rev Lett 2000; 85:3100-3104. [PMID: 11019276 DOI: 10.1103/physrevlett.85.3100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2000] [Indexed: 05/23/2023]
Abstract
We present the first measurement of pseudorapidity densities of primary charged particles near midrapidity in Au+Au collisions at sqrt[s(NN)] = 56 and 130 GeV. For the most central collisions, we find the charged-particle pseudorapidity density to be dN/deta|(|eta|<1) = 408+/-12(stat)+/-30(syst) at 56 GeV and 555+/-12(stat)+/-35(syst) at 130 GeV, values that are higher than any previously observed in nuclear collisions. Compared to proton-antiproton collisions, our data show an increase in the pseudorapidity density per participant by more than 40% at the higher energy.
Collapse
Affiliation(s)
- B B Back
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4843, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Dabrowski B, Zaleska A, Hupka J. Chloride ions formation during degradation of organochloride compounds using TiO2 deposited on glass microspheres. Cent Eur J Public Health 2000; 8 Suppl:37-8. [PMID: 10943452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Aqueous solutions containing 200 mg/dm3 of p,p'-DDT and methoxychlor were photodegraded for 60 min in UV/TiO2/O2 system and chloride ions concentration and pH were measured. From 60 to 80% of the investigated pesticides were eliminated after treatment. Over 27% of chlorine atoms were splitted off for methoxychlor and 10% for p,p'-DDT. The experimental data suggest, that chlorine atoms were removed from the -CCl3 moiety but the chlorine atoms bound to aromatic ring were left intact at this step of photodegradation.
Collapse
Affiliation(s)
- B Dabrowski
- Department of Chemical Technology, Technical University of Gdańsk, Poland.
| | | | | |
Collapse
|
29
|
Zhou J, Goodenough JB, Dabrowski B, Klamut PW, Bukowski Z. Enhanced susceptibility in LNiO3 perovskites ( L = La,Pr,Nd,Nd0.5Sm0. 5). Phys Rev Lett 2000; 84:526-529. [PMID: 11015955 DOI: 10.1103/physrevlett.84.526] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/1999] [Indexed: 05/23/2023]
Abstract
The temperature dependence of the resistivity rho(T) and of the dc magnetic susceptibility chi(T) were measured on high-quality LNiO3 (L = La,Pr,Nd,Nd0.5Sm0.5) samples synthesized under high oxygen pressure. Subtraction of the rare-earth contribution to chi(T) allows the presentation of the evolution of the susceptibility of the NiO3 array from Pauli to Curie-Weiss paramagnetism with decreasing bandwidth. A metal-insulator transition occurring at a temperature T(t) = T(N) is first order for L = Pr and Nd; it becomes second order and produces no anomaly in chi(-1)(T) at a T(t)>T(N) for L = Nd0.5Sm0.5. In the antiferromagnetic domain T<T(N), the chi(T) curve for the NiO3 array resembles that of a paramagnet.
Collapse
Affiliation(s)
- J Zhou
- Texas Materials Institute, ETC 9.102, University of Texas at Austin, Austin, Texas 78712-1063, USA
| | | | | | | | | |
Collapse
|
30
|
Salvador PA, Mason TO, Otzschi K, Greenwood KB, Poeppelmeier KR, Dabrowski B. Internal Chemistry of the Pure and Chemically Substituted Quadruple Perovskites Ln‘Ln‘‘Ba2Cu2Ti2O11 (Ln‘Ln‘‘ = LaY or NdDy). J Am Chem Soc 1997. [DOI: 10.1021/ja963908r] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- P. A. Salvador
- Contribution from the Departments of Materials Science and Engineering and Chemistry and Science and Technology Center for Superconductivity, Northwestern University, Evanston, Illinois 60208-3108, and Department of Physics and Science and Technology Center for Superconductivity, Northern Illinois University, DeKalb, Illinois 60115
| | - T. O. Mason
- Contribution from the Departments of Materials Science and Engineering and Chemistry and Science and Technology Center for Superconductivity, Northwestern University, Evanston, Illinois 60208-3108, and Department of Physics and Science and Technology Center for Superconductivity, Northern Illinois University, DeKalb, Illinois 60115
| | - K. Otzschi
- Contribution from the Departments of Materials Science and Engineering and Chemistry and Science and Technology Center for Superconductivity, Northwestern University, Evanston, Illinois 60208-3108, and Department of Physics and Science and Technology Center for Superconductivity, Northern Illinois University, DeKalb, Illinois 60115
| | - K. B. Greenwood
- Contribution from the Departments of Materials Science and Engineering and Chemistry and Science and Technology Center for Superconductivity, Northwestern University, Evanston, Illinois 60208-3108, and Department of Physics and Science and Technology Center for Superconductivity, Northern Illinois University, DeKalb, Illinois 60115
| | - K. R. Poeppelmeier
- Contribution from the Departments of Materials Science and Engineering and Chemistry and Science and Technology Center for Superconductivity, Northwestern University, Evanston, Illinois 60208-3108, and Department of Physics and Science and Technology Center for Superconductivity, Northern Illinois University, DeKalb, Illinois 60115
| | - B. Dabrowski
- Contribution from the Departments of Materials Science and Engineering and Chemistry and Science and Technology Center for Superconductivity, Northwestern University, Evanston, Illinois 60208-3108, and Department of Physics and Science and Technology Center for Superconductivity, Northern Illinois University, DeKalb, Illinois 60115
| |
Collapse
|
31
|
Zhou J, Goodenough JB, Dabrowski B, Rogacki K. Transport Properties of a YBa2Cu4O8 Crystal under High Pressure. Phys Rev Lett 1996; 77:4253-4256. [PMID: 10062487 DOI: 10.1103/physrevlett.77.4253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
32
|
Basov DN, Liang R, Dabrowski B, Bonn DA, Hardy WN, Timusk T. Pseudogap and Charge Dynamics in CuO2 Planes in YBCO. Phys Rev Lett 1996; 77:4090-4093. [PMID: 10062385 DOI: 10.1103/physrevlett.77.4090] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
33
|
Corti M, Suh BJ, Tabak F, Rigamonti A, Borsa F, Xu M, Dabrowski B. Flux-line dynamics in YBa2Cu4O8 from 89Y NMR. Phys Rev B Condens Matter 1996; 54:9469-9474. [PMID: 9984686 DOI: 10.1103/physrevb.54.9469] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
34
|
Jorgensen JD, Chmaissem O, Argyriou DN, Hinks DG, Guptasarma P, Shimoyama J, Kishio K, Yamaura K, Hiroi Z, Takano M, Storey BG, Zhang H, Marks LD, Wang YY, Dravid VP, Dabrowski B. Structure modification to increase flux pinning in Hg–Ba–Ca–Cu–O superconductors. Acta Crystallogr A 1996. [DOI: 10.1107/s0108767396084310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
35
|
Xu M, Sok J, Ostenson JE, Finnemore DK, Dabrowski B. Reversible magnetization and anisotropy in YBa2Cu4O8. Phys Rev B Condens Matter 1996; 53:15313-15315. [PMID: 9983329 DOI: 10.1103/physrevb.53.15313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
36
|
Xu M, Ostenson JE, Finnemore DK, Kramer MJ, Fendrich JA, Hettinger JD, Welp U, Crabtree GW, Dabrowski B, Zhang K. Comparison of superconducting flux pinning due to ion irradiation and fishtail effects. Phys Rev B Condens Matter 1996; 53:5815-5817. [PMID: 9984187 DOI: 10.1103/physrevb.53.5815] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
37
|
Dabrowski B, Wang Z, Rogacki K, Jorgensen JD, Hitterman RL, Wagner JL, Hunter BA, Radaelli PG, Hinks DG. Dependence of superconducting transition temperature on doping and structural distortion of the CuO2 planes in La2-xMxCuO4 (M=Nd, Ca, Sr). Phys Rev Lett 1996; 76:1348-1351. [PMID: 10061698 DOI: 10.1103/physrevlett.76.1348] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
38
|
Chmaissem O, Argyriou DN, Hinks DG, Jorgensen JD, Storey BG, Zhang H, Marks LD, Wang YY, Dravid VP, Dabrowski B. Chromium clustering and ordering in Hg1-xCrxSr2CuO4+ delta. Phys Rev B Condens Matter 1995; 52:15636-15643. [PMID: 9980926 DOI: 10.1103/physrevb.52.15636] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
39
|
Basov DN, Mook HA, Dabrowski B, Timusk T. c-axis response of single- and double-layered cuprates. Phys Rev B Condens Matter 1995; 52:13141-13144. [PMID: 9980499 DOI: 10.1103/physrevb.52.r13141] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
40
|
Jezowski A, Klamut J, Dabrowski B. Evidence for the shift of the transition temperature in RBa2Cu4O8 by thermal-conductivity measurements. Phys Rev B Condens Matter 1995; 52:R7030-R7033. [PMID: 9979742 DOI: 10.1103/physrevb.52.r7030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
41
|
Sturhahn W, Toellner TS, Alp EE, Zhang X, Ando M, Yoda Y, Kikuta S, Seto M, Kimball CW, Dabrowski B. Phonon density of states measured by inelastic nuclear resonant scattering. Phys Rev Lett 1995; 74:3832-3835. [PMID: 10058308 DOI: 10.1103/physrevlett.74.3832] [Citation(s) in RCA: 100] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
42
|
Sok J, Xu M, Chen W, Suh BJ, Gohng J, Finnemore DK, Kramer MJ, Schwartzkopf LA, Dabrowski B. Reversible magnetization, critical fields, and vortex structure in grain-aligned YBa2Cu4O8. Phys Rev B Condens Matter 1995; 51:6035-6040. [PMID: 9979520 DOI: 10.1103/physrevb.51.6035] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
43
|
Basov D, Liang R, Bonn D, Hardy W, Dabrowski B, Quijada M, Tanner D, Rice J, Ginsberg D, Timusk T. In-Plane Anisotropy of the Penetration Depth in YBa2Cu3O7-x and YBa2Cu4O8 Superconductors. Phys Rev Lett 1995; 74:598-601. [PMID: 10058798 DOI: 10.1103/physrevlett.74.598] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
44
|
Gofron K, Campuzano JC, Abrikosov AA, Lindroos M, Bansil A, Ding H, Koelling D, Dabrowski B. Observation of an "extended" Van Hove singularity in YBa2Cu4O8 by ultrahigh energy resolution angle-resolved photoemission. Phys Rev Lett 1994; 73:3302-3305. [PMID: 10057342 DOI: 10.1103/physrevlett.73.3302] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
45
|
Shaked H, Shimakawa Y, Hunter BA, Radaelli PG, Dabrowski B, Hitterman RL, Jorgensen JD, Han PD, Payne DA, Kikkawa S, Er G, Kanamaru F. Structural effects of hydrostatic pressure in Sr1-xMxCuO2 (M=La,Ca) and Sr4Cu6O10. Phys Rev B Condens Matter 1994; 50:12752-12759. [PMID: 9975441 DOI: 10.1103/physrevb.50.12752] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
46
|
Cucolo AM, Leo RD, Romano P, Dabrowski B, Hinks DG, Radaelli PG. Tunneling spectroscopy into YBa2Cu4O8: Intralayer and interlayer analysis. Phys Rev B Condens Matter 1994; 50:10397-10400. [PMID: 9975137 DOI: 10.1103/physrevb.50.10397] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
47
|
Basov DN, Timusk T, Dabrowski B, Jorgensen JD. c-axis response of YBa2Cu4O8: A pseudogap and possibility of Josephson coupling of CuO2 planes. Phys Rev B Condens Matter 1994; 50:3511-3514. [PMID: 9976625 DOI: 10.1103/physrevb.50.3511] [Citation(s) in RCA: 96] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
48
|
Switka S, Słodkowski M, Jankowski M, Pertkiewicz M, Dabrowski B. [14-year experience with surgical treatment of chronic pancreatitis]. Pol Tyg Lek 1994; 49:512-5. [PMID: 7675700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The authors discuss their own 14-year experience with surgical treatment of the chronic pancreatitis. They treated 64 patients of a mean age of 43 years. An abdominal pain, persisting in all patients, constituted the main indication to surgery. Forty patients underwent pancreatic enterostomy with Puestow technique, 19 patients resections of various extension, and 5 patients underwent pancreatic duodenostomy. Mortality rate in pancreatic enterostomy and pancreatic duodenostomy was 2.5% whereas mortality rate in resections was 5.3%. Complications were noted in 27.5% and 36.8% of patients, respectively. Pain was completely abolished or markedly reduced in 90% of patients. Forty eight (77.4%) out of 62 patients were identified and followed up. According to commonly used criteria, positive late results were achieved in 56.2% of patients, moderate in 29.2%, and poor result in 14.6% of the treated patients.
Collapse
Affiliation(s)
- S Switka
- Katedry i Kliniki Chirurgii Gastroenterologicznej AM w Warszawie
| | | | | | | | | |
Collapse
|
49
|
Blumberg G, Liu R, Klein MV, Lee WC, Ginsberg DM, Gu C, Veal BW, Dabrowski B. Two-magnon Raman scattering in cuprate superconductors: Evolution of magnetic fluctuations with doping. Phys Rev B Condens Matter 1994; 49:13295-13298. [PMID: 10010263 DOI: 10.1103/physrevb.49.13295] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
50
|
Nichols DH, Dabrowski B, Welp U, Crow JE. Magnetic anisotropy in single-crystal rare-earth-doped RBa2Cu4O8 (R=Y, Dy, Gd, Ho, Er, Tm, Yb). Phys Rev B Condens Matter 1994; 49:9150-9156. [PMID: 10009697 DOI: 10.1103/physrevb.49.9150] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|