1
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TSFZ Growth of Eu-Substituted Large-Size LSCO Crystals. CRYSTALS 2022. [DOI: 10.3390/cryst12070998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The travelling solvent floating zone (TSFZ) growth of Eu-substituted LSCO (La1.81−xEuxSr0.19CuO4, with nominal x = 0 ÷ 0.4) single crystals was systematically explored for the first time. The substitution of La with Eu considerably decreased the decomposition temperature. Optimal growth parameters were found to be: oxygen pressure 9.0–9.5 bars; Eu-free CuO-poor solvent (66 mol% CuO) with a molar ratio of La2O3:SrCO3:CuO = 4:4.5:16.5 and growth rate 0.6 mm/hour. The obtained single crystals were characterized with optical polarized microscopy, X-ray diffraction and energy-dispersive X-ray spectroscopy analysis. The solubility of Eu in LSCO appeared to be limited to x~0.36–0.38 under the used conditions. The substitution of La3+ with smaller Eu3+ ions led to a structural transition from tetragonal with space group I4/mmm for La1.81Sr0.19CuO4 (x = 0) to orthorhombic with space group Fmmm for La1.81−xSr0.19EuxCuO4 (x = 0.2, 0.3, 0.4), and to a substantial shrinking of the c-axis from 13.2446 Å (x = 0.0) to 13.1257 Å (x = 0.4). Such structural changes were accompanied by a dramatic decrease in the superconducting critical temperature, Tc, from 29.5 K for x = 0 to 13.8 K for 0.2. For x ≥ 0.3, no superconductivity was detected down to 4 K.
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2
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Abe M, Kawasoko H, Fukumura T. Low-temperature topotactic oxidation using the solid-state oxidant Zr-doped CeO 2. Chem Commun (Camb) 2021; 57:11326-11329. [PMID: 34636827 DOI: 10.1039/d1cc03772b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A new topotactic oxidation was developed using the solid-state oxidant Zr-doped CeO2. For the anti-ThCr2Si2 type Y2O2Bi, which became superconducting via oxygen intercalation during solid-state oxidation at 1000 °C, the topotactic oxidation enabled not only the oxygen intercalation at a much lower temperature of 200 °C, hampering the segregation of impurity phases, but also the highest superconducting transition temperature for Y2O2Bi.
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Affiliation(s)
- Masanagi Abe
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.
| | - Hideyuki Kawasoko
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.
| | - Tomoteru Fukumura
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan. .,Advanced Institute for Materials Research and Core Research Cluster, Tohoku University, Sendai 980-8577, Japan
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3
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Synthesis and characterisation of Sr4Fe3-xCrxO10-δ: Stabilisation of n=3 Ruddlesden-Popper phases through Cr doping. J SOLID STATE CHEM 2020. [DOI: 10.1016/j.jssc.2020.121372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4
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Whittingham AWH, Smith RDL. Electrochemically Induced Phase Changes in La
2
CuO
4
During Cathodic Electrocatalysis. ChemElectroChem 2019. [DOI: 10.1002/celc.201901412] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Rodney D. L. Smith
- Department of ChemistryUniversity of Waterloo 200 University Avenue W. Waterloo, Ontario Canada N2 L 3G1
- Waterloo Institute for NanotechnologyUniversity of Waterloo 200 University Avenue W. Waterloo, Ontario Canada N2 L 3G1
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5
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Liu J, Andersen HL, Al Bahri OK, Bhattacharyya S, Rawal A, Brand HEA, Sharma N. Electrochemically activated solid synthesis: an alternative solid-state synthetic method. Dalton Trans 2018; 47:14604-14611. [PMID: 30270397 DOI: 10.1039/c8dt02946f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Solid-state synthesis is one of the most common synthetic methods in chemistry and is extensively used in lab-scale syntheses of advanced functional materials to ton-scale production of chemical compounds. It generally requires at least one or several high temperature and/or high-pressure steps, which makes production of compounds via solid-state methods very energy and time intensive. Consequently, there is a persistent economic and environmental incentive to identify less energy and time consuming synthetic pathways. Here, we present an alternative solid-state synthetic method, which utilizes structural changes, induced by an electrochemical "activation" step followed by a thermal treatment step. The method has been used to synthesize a Sc0.67WO4-type phase where Sc0.67WO4 has previously only been obtained at 1400 °C and 4 GPa for 1 h. Through our method the Sc0.67WO4-type phase has been prepared at only 600 °C and ambient pressure. Experimental factors that influence phase formation from the electrochemical perspective are detailed. Overall, the method presented in this work appears to be able to generate the conditions for unusual and new phases to form and thus becomes another tool for synthetic solid-state chemists. This in turn permits the exploration of a larger synthetic parameter space.
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Affiliation(s)
- Junnan Liu
- School of Chemistry, UNSW Australia, Sydney, NSW 2052, Australia.
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6
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Wei HI, Adamo C, Nowadnick EA, Lochocki EB, Chatterjee S, Ruf JP, Beasley MR, Schlom DG, Shen KM. Electron Doping of the Parent Cuprate La_{2}CuO_{4} without Cation Substitution. PHYSICAL REVIEW LETTERS 2016; 117:147002. [PMID: 27740780 DOI: 10.1103/physrevlett.117.147002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Indexed: 06/06/2023]
Abstract
In the cuprates, carrier doping of the Mott insulating parent state is necessary to realize superconductivity as well as a number of other exotic states involving charge or spin density waves. Cation substitution is the primary method for doping carriers into these compounds, and is the only known method for electron doping in these materials. Here, we report electron doping without cation substitution in epitaxially stabilized thin films of La_{2}CuO_{4} grown via molecular-beam epitaxy. We use angle-resolved photoemission spectroscopy to directly measure their electronic structure and conclusively determine that these compounds are electron doped with a carrier concentration of 0.09±0.02 e^{-}/Cu. We propose that intrinsic defects, most likely oxygen vacancies, are the sources of doped electrons in these materials. Our results suggest a new approach to electron doping in the cuprates, one which could lead to a more detailed experimental understanding of their properties.
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Affiliation(s)
- Haofei I Wei
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York 14853, USA
| | - Carolina Adamo
- Department of Applied Physics, Stanford University, Palo Alto, California 94306, USA
| | - Elizabeth A Nowadnick
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA
| | - Edward B Lochocki
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York 14853, USA
| | - Shouvik Chatterjee
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York 14853, USA
| | - Jacob P Ruf
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York 14853, USA
| | - Malcolm R Beasley
- Department of Applied Physics, Stanford University, Palo Alto, California 94306, USA
| | - Darrell G Schlom
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, USA
| | - Kyle M Shen
- Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York 14853, USA
- Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, USA
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7
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Xie W, Lee YL, Shao-Horn Y, Morgan D. Oxygen Point Defect Chemistry in Ruddlesden-Popper Oxides (La1-xSrx)2MO4±δ (M = Co, Ni, Cu). J Phys Chem Lett 2016; 7:1939-44. [PMID: 27157124 DOI: 10.1021/acs.jpclett.6b00739] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Stability of oxygen point defects in Ruddlesden-Popper oxides (La1-xSrx)2MO4±δ (M = Co, Ni, Cu) is studied with density functional theory calculations to determine their stable sites, charge states, and energetics as functions of Sr content (x), transition metal (M), and defect concentration (δ). We demonstrate that the dominant O point defects can change between oxide interstitials, peroxide interstitials, and vacancies. In general, increasing x and atomic number of M stabilizes peroxide over oxide interstitials as well as vacancies over both peroxide and oxide interstitials; increasing δ destabilizes both oxide interstitials and vacancies but barely affects peroxide interstitials. We also demonstrate that the O 2p-band center is a powerful descriptor for these materials and correlates linearly with the formation energy of all defects. The trends of formation energy versus x, M, and δ and the correlation with O 2p-band center are explained in terms of oxidation chemistry and electronic structure.
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Affiliation(s)
- Wei Xie
- Department of Materials Science and Engineering, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
| | - Yueh-Lin Lee
- Department of Materials Science and Engineering, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
- Electrochemical Energy Laboratory, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Yang Shao-Horn
- Electrochemical Energy Laboratory, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Dane Morgan
- Department of Materials Science and Engineering, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
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8
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Di Gioacchino D, Puri A, Marcelli A, Poccia N, Ricci A, Bianconi A. The flux dynamics behavior of the two competing high temperature superconducting phases in underdoped LaCuO4.06. Phys Chem Chem Phys 2016; 18:12534-40. [PMID: 27087671 DOI: 10.1039/c6cp01400c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In complex transition metal oxides (TMO) an arrested electronic phase separation (PS) appears by tuning the system near a Lifshitz transition in multiband Hubbard models. The PS in La2CuO4+y near insulator to metal transition (IMT) is made of short range Charge Density Wave (CDW) order inhomogeneity coexisting with quenched lattice disorder. While at high doping y = 0.1 percolation gives a single superconducting phase, near the IMT at y = 0.06 two coexisting superconducting phases appear: the first one with a critical temperature Tc1 = 16 K and the second one with Tc2 = 29 K. It is known that the two superconducting phases are characterized by two different space geometry because of two different spatial distributions of both CDW order and dopants self-organization. Here we show that these two phases show different flux dynamic regimes using alternating current (AC) multi-harmonic susceptibility experiments. This is a unique technique capable to investigate multi-phase superconductors and characterize their transport properties in a percolative scenario. Results point out that the low critical temperature phase is well described by a bulk-like flux pinning with a 2D geometry while the phase with higher critical temperature shows a 'barrier pinning' mechanism providing direct evidence of two different superconducting vortex dynamics in different complex geometrical spaces.
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Affiliation(s)
- D Di Gioacchino
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, 00044 Frascati (RM), Italy.
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9
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Optimum inhomogeneity of local lattice distortions in La2CuO(4+y). Proc Natl Acad Sci U S A 2012; 109:15685-90. [PMID: 22961255 DOI: 10.1073/pnas.1208492109] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Electronic functionalities in materials from silicon to transition metal oxides are, to a large extent, controlled by defects and their relative arrangement. Outstanding examples are the oxides of copper, where defect order is correlated with their high superconducting transition temperatures. The oxygen defect order can be highly inhomogeneous, even in optimal superconducting samples, which raises the question of the nature of the sample regions where the order does not exist but which nonetheless form the "glue" binding the ordered regions together. Here we use scanning X-ray microdiffraction (with a beam 300 nm in diameter) to show that for La(2)CuO(4+y), the glue regions contain incommensurate modulated local lattice distortions, whose spatial extent is most pronounced for the best superconducting samples. For an underdoped single crystal with mobile oxygen interstitials in the spacer La(2)O(2+y) layers intercalated between the CuO(2) layers, the incommensurate modulated local lattice distortions form droplets anticorrelated with the ordered oxygen interstitials, and whose spatial extent is most pronounced for the best superconducting samples. In this simplest of high temperature superconductors, there are therefore not one, but two networks of ordered defects which can be tuned to achieve optimal superconductivity. For a given stoichiometry, the highest transition temperature is obtained when both the ordered oxygen and lattice defects form fractal patterns, as opposed to appearing in isolated spots. We speculate that the relationship between material complexity and superconducting transition temperature T(c) is actually underpinned by a fundamental relation between T(c) and the distribution of ordered defect networks supported by the materials.
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10
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Le Dréau L, Prestipino C, Hernandez O, Schefer J, Vaughan G, Paofai S, Perez-Mato JM, Hosoya S, Paulus W. Structural Modulation and Phase Transitions in La2CoO4.14 Investigated by Synchrotron X-ray and Neutron Single-Crystal Diffraction. Inorg Chem 2012; 51:9789-98. [DOI: 10.1021/ic301165a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Loïc Le Dréau
- Institut des
Sciences Chimiques
de Rennes, Université de Rennes 1, UMR CNRS-UR1 6226, Campus de Beaulieu, Bât 10B, 35042 Rennes
Cedex, France
- Laboratory
for Neutron Scattering, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
| | - Carmelo Prestipino
- Institut des
Sciences Chimiques
de Rennes, Université de Rennes 1, UMR CNRS-UR1 6226, Campus de Beaulieu, Bât 10B, 35042 Rennes
Cedex, France
| | - Olivier Hernandez
- Institut des
Sciences Chimiques
de Rennes, Université de Rennes 1, UMR CNRS-UR1 6226, Campus de Beaulieu, Bât 10B, 35042 Rennes
Cedex, France
| | - Jürg Schefer
- Laboratory
for Neutron Scattering, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
| | - Gavin Vaughan
- European Synchrotron Radiation Facility, ID11, Grenoble, France
| | - Serge Paofai
- Institut des
Sciences Chimiques
de Rennes, Université de Rennes 1, UMR CNRS-UR1 6226, Campus de Beaulieu, Bât 10B, 35042 Rennes
Cedex, France
| | - Juan Manuel Perez-Mato
- Departamento de Fisica de la
Materia Condensada, Facultad de Ciencias, Universidad del Pais Vasco, UPV/EHU Apdo. 664, E-48080 Bilbao, Spain
| | - Shoichi Hosoya
- Institute of Inorganic Synthesis,
Faculty of Engineering, Yamanashi University, Miyamae-cho 7, Kofu 400, Japan
| | - Werner Paulus
- Institut Charles Gerhardt, Université de Montpellier, UMR 5253 CNRS-ENSCM-UM2-UM1,
8 rue de l’Ecole Normale, 34296 Montpellier, France
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11
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Le Nestour A, Gaudon M, Villeneuve G, Daturi M, Andriessen R, Demourgues A. Defects in Divided Zinc−Copper Aluminate Spinels: Structural Features and Optical Absorption Properties. Inorg Chem 2007; 46:4067-78. [PMID: 17417834 DOI: 10.1021/ic0624064] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Zn1-xCuxAl2O4 (0 < or = x < 0.30) compounds have been synthesized by polyesterification using metallic salts and annealing at low temperatures as well as by conventional solid state. XRD-powder data refinements (Rietveld method) have demonstrated that both compound series crystallize in the spinel structure (Fd3m) and exhibit similar inversion rates. This low-temperature route lead to metastable phases with crystallite sizes around 40 nm whereas particle sizes are larger than 1 moicrom in the case of solid-state route. This preparative method largely described in the literature allows stabilizing reduced copper states thanks to the presence of reductive organic species, which are decomposed below T = 700 degrees C. The absorption spectra of the x = 0.15 composition exhibit strong differences depending on the synthesis route. These differences can be explained by the occurrence of Cu2+/Cu+ mixed valencies in compounds prepared by the low-temperature route; 33% of monovalent copper has been identified in the x = 0.15 composition prepared by low-temperature process, whereas the solid-state compound contains only divalent copper. Reductive properties of polyesterification reaction implying citric acid and low annealing temperature (T = 700 degrees C) are mainly responsible of the occurrence of the Cu2+/Cu+ mixed valencies. Actually, the annealing under air at T = 1000 degrees C of divided zinc-copper aluminates prepared at low temperatures (T = 700 degrees C) leads to the oxidation reaction Cu+ --> Cu2+ + e- confirmed by the evolution of magnetic measurements, ESR spectra, and optical absorption properties. Defects such as oxygen vacancies in the anionic network leading to reduction in the cations coordination number could also explain the strong evolution of optical absorption spectra especially around lambda = 700 nm where intervalencies transfer (Cu+/Cu2+) as well as intra-atomic d-d transitions (Cu2+ in a 5-fold coordination) can occur. Finally the occurrence of monovalent and divalent copper at the surface of such divided oxides, probably in tetrahedral sites, has been demonstrated by FTIR spectroscopy using the co-adsorption of CO and NO as probe molecules.
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Affiliation(s)
- Anne Le Nestour
- Institut de Chimie de la Matière Condensée, UPR 9048 CNRS, Université de Bordeaux I, 87 Avenue du Dr. A. Schweitzer, 33608 Pessac Cedex, France
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12
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Lee KH, Hoffmann R. Oxygen Interstitials in Superconducting La2CuO4: Their Valence State and Role. J Phys Chem A 2005; 110:609-17. [PMID: 16405333 DOI: 10.1021/jp053154f] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The nature of the much debated valence state of an interstitial oxygen atom in oxygen-doped La2CuO4 is the subject of this paper. In model cluster calculations, we studied the position, charge, and spin state of the interstitial oxygen atoms in this superconductor. The models considered allow the interstitial oxygen to move off a symmetrical position, to have varying spin and charge, and to be surrounded by various magnetic environments. UB3LYP calculations show that a model having an interstitial oxygen atom with a total spin of 1 is lowest in energy; the interstitial oxygen atoms here act as stable radicals with a net charge of -1. These results agree with experimental evidence for the paramagnetic behavior for interstitial atoms. The energy associated with a spin flip at a Cu site in our models is lower if interstitial oxygen has a local electron spin density, compared to the case when it does not. We provide a possible explanation for the increase of the doping concentrations of interstitial oxygen with a decrease of the Néel temperature of this system. The relative stability of the models we consider depends on their spin states, accompanied by structural changes; this explains indirectly the experimental change of the slope (from 2 to 1.3) of the linear relationship between the hole concentration and the oxygen content. Our results support a stripe phase in high temperature superconductivity; in our calculations, hole doping to the copper oxide layer comes only through the formation of an oxygen interstitial pair, not from any change of the local structural environment and magnetic field around the single interstitial.
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Affiliation(s)
- Kee Hag Lee
- Department of Chemistry and Research Institute of Basic Science, Wonkwang University, Iksan 570-749, Korea.
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13
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Zaghrioui M, Giovannelli F, Brouri ND, Laffez I. Anomalies in magnetic susceptibility of nonstoichiometric Nd2NiO4+δ (δ=0.049, 0.065, 0.077, 0.234). J SOLID STATE CHEM 2004. [DOI: 10.1016/j.jssc.2004.05.065] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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15
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Electrochemically induced reversible solid state transformations: electrosynthesis of Ag2Cu2O4 by room temperature oxidation of Ag2Cu2O3. Electrochem commun 2002. [DOI: 10.1016/s1388-2481(02)00433-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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16
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Moreira IP, Muñoz D, Illas F, de Graaf C, Garcia-Bach M. A relationship between electronic structure effective parameters and Tc in monolayered cuprate superconductors. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)00846-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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17
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18
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Superconducting Sr2−xAxCuO2F2+δ(A=Ca, Ba): Synthetic Pathways and Associated Structural Rearrangements. J SOLID STATE CHEM 1998. [DOI: 10.1006/jssc.1997.7564] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Abstract
▪ Abstract The layered perovskite cuprate materials are a unique class of superconductors with unusual normal-state and superconducting properties. The common physics to all these materials is that of the underlying CuO2 planes. This review provides a survey of and guide to their physical properties as it relates to the superconductivity of this interesting group of conducting oxides.
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Affiliation(s)
- Z. Fisk
- National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32306
| | - J. L. Sarrao
- National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32306
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20
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Mahı́a J, Martı́nez-Lorenzo JL, Blanco M, López-Quintela M. Structural Characterization of Electrochemically Oxidized La2CuO4+δParticles Prepared by a Sol–Gel Method. J SOLID STATE CHEM 1997. [DOI: 10.1006/jssc.1997.7368] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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21
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Thomson JB, Armstrong AR, Bruce PG. A New Class of Pyrochlore Solid Solution Formed by Chemical Intercalation of Oxygen. J Am Chem Soc 1996. [DOI: 10.1021/ja961202r] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- James B. Thomson
- Contribution from the School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9ST, Scotland
| | - A. Robert Armstrong
- Contribution from the School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9ST, Scotland
| | - Peter G. Bruce
- Contribution from the School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9ST, Scotland
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22
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Bianconi A, Saini NL, Rossetti T, Lanzara A, Perali A, Missori M, Oyanagi H, Yamaguchi H, Nishihara Y, Ha DH. Stripe structure in the CuO2 plane of perovskite superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:12018-12021. [PMID: 9985057 DOI: 10.1103/physrevb.54.12018] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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Fisher RA, Gordon JE, Phillips NE. SOME CHEMICAL AND STRUCTURAL EFFECTS ON THE PROPERTIES OF HIGH-Tc SUPERCONDUCTORS. Annu Rev Phys Chem 1996. [DOI: 10.1146/annurev.physchem.47.1.283] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
▪ Abstract The history of superconductivity, including superconductivity in the high-Tc cuprates, is reviewed very briefly, and the differences between conventional superconductors and the high-Tc cuprates are summarized. The basic crystal structures of the major series of high-Tc cuprates are described and compared. The relation of structures to superconducting properties is reviewed with an emphasis on the orthorhombic-tetragonal transition in (La2−x Srx)CuO4; the corresponding transition, and also the transition to the low-temperature tetragonal phase in (La2−xBax)CuO4; and the effects of oxygen vacancies, oxygen-vacancy ordering, frozen-in disorder, and occupation of the off-chain O(5) sites in YBa2Cu3O7−δ. The effects of chemical substitutions of lanthanide elements on the La/Sr sites in (La2−xSrx)CuO4 and on the Y sites in YBa2Cu3O7−δ, and of 3d elements and sp elements on the Cu sites in both systems are reviewed. The difference between the effects of the lanthanide substitutions, particularly Pr, in the two systems are considered. Major properties of the Bi-, Tl-, and Hg-cuprates, are described briefly. A comparison of the high-Tc cuprates with noncuprate oxide superconductors is given.
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Affiliation(s)
- R. A. Fisher
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - J. E. Gordon
- Lawrence Berkeley National Laboratory, Berkeley, California 94720
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24
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Arrouy F, Locquet JP, Williams EJ, Mächler E, Berger R, Gerber C, Monroux C, Grenier JC, Wattiaux A. Growth, microstructure, and electrochemical oxidation of MBE-grown c-axis La2CuO4 thin films. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:7512-7520. [PMID: 9984379 DOI: 10.1103/physrevb.54.7512] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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25
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Inaguma Y, Itoh M, Oguni M, Kyômen T. Effect of oxygen content on the anomalies at successive phase transitions of La2CuO4+ delta single crystal below 320 K. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:7455-7461. [PMID: 9984372 DOI: 10.1103/physrevb.54.7455] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bianconi A, Lusignoli M, Saini NL, Bordet P, Radaelli PG. Stripe structure of the CuO2 plane in Bi2Sr2CaCu2O8+y by anomalous x-ray diffraction. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:4310-4314. [PMID: 9986336 DOI: 10.1103/physrevb.54.4310] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Chou FC, Johnston DC. Phase separation and oxygen diffusion in electrochemically oxidized La2CuO4+ delta : A static magnetic susceptibility study. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:572-583. [PMID: 9984293 DOI: 10.1103/physrevb.54.572] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bianconi A, Saini NL, Lanzara A, Missori M, Rossetti T, Oyanagi H, Yamaguchi H, Oka K, Ito T. Determination of the local lattice distortions in the CuO2 plane of La1.85Sr0.15CuO4. PHYSICAL REVIEW LETTERS 1996; 76:3412-3415. [PMID: 10060960 DOI: 10.1103/physrevlett.76.3412] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Xiong X, Wochner P, Moss SC, Cao Y, Koga K, Fujita M. Evidence of in-plane superstructure formation in phase-separated and staged single crystal La2CuO4+ delta. PHYSICAL REVIEW LETTERS 1996; 76:2997-3000. [PMID: 10060844 DOI: 10.1103/physrevlett.76.2997] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Statt BW, Hammel PC, Fisk Z, Cheong SW, Chou FC, Johnston DC, Schirber JE. Oxygen ordering and phase separation in La2CuO4+ delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:15575-15581. [PMID: 9980918 DOI: 10.1103/physrevb.52.15575] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Quijada MA, Tanner DB, Chou FC, Johnston DC, Cheong S. Optical properties of single-crystal La2CuO4+ delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:15485-15503. [PMID: 9980906 DOI: 10.1103/physrevb.52.15485] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Dmowski W, McQueeney RJ, Egami T, Feng YP, Sinha SK, Hinatsu T, Uchida S. Temperature-dependent x-ray diffuse scattering from single crystals of La2-xSrxCuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:6829-6839. [PMID: 9981912 DOI: 10.1103/physrevb.52.6829] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Argyriou DN, Jorgensen JD, Hitterman RL, Hiroi Z, Kobayashi N, Takano M. Structure and superconductivity without apical oxygens in (Ca,Na)2CuO2Cl2. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:8434-8437. [PMID: 9977455 DOI: 10.1103/physrevb.51.8434] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Sanchez R, Torresi R, Rettori C, Oseroff S, Fisk Z. Electrochemical intercalation of O2− in La2CuO4 single crystals. Electrochim Acta 1995. [DOI: 10.1016/0013-4686(94)00283-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tranquada JM, Kong Y, Lorenzo JE, Buttrey DJ, Rice DE, Sachan V. Oxygen intercalation, stage ordering, and phase separation in La2NiO4+ delta with 0.05 <~ delta <~ 0.11. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:6340-6351. [PMID: 9977011 DOI: 10.1103/physrevb.50.6340] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Zhou J, Chen H, Goodenough JB. Effect of pressure and quenching on superconductive La2CuO4+ delta (0< delta <0.1). PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:4168-4180. [PMID: 9976703 DOI: 10.1103/physrevb.50.4168] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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AI-Mamouri M, Edwards PP, Greaves C, Slaski M. Synthesis and superconducting properties of the strontium copper oxy-fluoride Sr2CuO2F2+δ. Nature 1994. [DOI: 10.1038/369382a0] [Citation(s) in RCA: 287] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Vaknin D, Zarestky JL, Johnston DC, Schirber JE, Fisk Z. Phase separation to antiferromagnetic and superconducting domains in oxygen-rich single-crystal La2CuO4+x: Magnetic and structural neutron-diffraction studies. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:9057-9063. [PMID: 10009685 DOI: 10.1103/physrevb.49.9057] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Radaelli PG, Jorgensen JD, Kleb R, Hunter BA, Chou FC, Johnston DC. Miscibility gap in electrochemically oxygenated La2CuO4+ delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:6239-6245. [PMID: 10011609 DOI: 10.1103/physrevb.49.6239] [Citation(s) in RCA: 118] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Hammel PC, Reyes AP, Cheong SW, Fisk Z, Schirber JE. NMR study of local structure in metallic La2CuO4+ delta. PHYSICAL REVIEW LETTERS 1993; 71:440-443. [PMID: 10055271 DOI: 10.1103/physrevlett.71.440] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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