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Martínez de Irujo-Labalde X, Page JE, Morgan HW, McGrady JE, Hayward MA. Crystal and magnetic structures of the Ir(V) JeffIr = 0 double perovskite LaSrNiIrO6. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Chin CM, Cassidy SJ, Hunter EC, Battle PD. Composition-dependent transition from spin glass to ferrimagnet in CaLa2Ni2-Cu WO9 (0 ≤ x ≤ 0.5). J SOLID STATE CHEM 2020. [DOI: 10.1016/j.jssc.2020.121388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Chin C, Battle PD, Hunter EC, Avdeev M, Hendrickx M, Hadermann J. Magnetic properties of La3Ni2Sb Ta Nb1––O9; from relaxor to spin glass. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.02.044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Hunter EC, Battle PD, Suard E, Manuel P. Structure and magnetic properties of cation-disordered perovskites SrLaCrSnO6 and Ca2CeCr2TiO9. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2018.10.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Tang Y, Hunter EC, Battle PD, Hendrickx M, Hadermann J, Cadogan JM. Ferrimagnetism as a Consequence of Unusual Cation Ordering in the Perovskite SrLa 2FeCoSbO 9. Inorg Chem 2018; 57:7438-7445. [PMID: 29808998 DOI: 10.1021/acs.inorgchem.8b01012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A polycrystalline sample of SrLa2FeCoSbO9 has been prepared in a solid-state reaction and studied by a combination of electron microscopy, magnetometry, Mössbauer spectroscopy, X-ray diffraction, and neutron diffraction. The compound adopts a monoclinic (space group P21/ n; a = 5.6218(6), b = 5.6221(6), c = 7.9440(8) Å, β = 90.050(7)° at 300 K) perovskite-like crystal structure with two crystallographically distinct six-coordinate sites. One of these sites is occupied by 2/3 Co2+, 1/3 Fe3+ and the other by 2/3 Sb5+, 1/3 Fe3+. This pattern of cation ordering results in a transition to a ferrimagnetic phase at 215 K. The magnetic moments on nearest-neighbor, six-coordinate cations align in an antiparallel manner, and the presence of diamagnetic Sb5+ on only one of the two sites results in a nonzero remanent magnetization of ∼1 μB per formula unit at 5 K.
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Affiliation(s)
- Yawei Tang
- Inorganic Chemistry Laboratory , University of Oxford , South Parks Road , Oxford OX1 3QR , U.K
| | - Emily C Hunter
- Inorganic Chemistry Laboratory , University of Oxford , South Parks Road , Oxford OX1 3QR , U.K
| | - Peter D Battle
- Inorganic Chemistry Laboratory , University of Oxford , South Parks Road , Oxford OX1 3QR , U.K
| | - Mylène Hendrickx
- EMAT , University of Antwerp , Groenenborgerlaan 171 , 2020 Antwerp , Belgium
| | - Joke Hadermann
- EMAT , University of Antwerp , Groenenborgerlaan 171 , 2020 Antwerp , Belgium
| | - J M Cadogan
- School of Physical, Environmental and Mathematical Sciences , UNSW Canberra at the Australian Defence Force Academy , Canberra , BC 2610 , Australia
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Orayech B, Ortega-San-Martín L, Urcelay-Olabarria I, Lezama L, Rojo T, Arriortua MI, Igartua JM. The effect of partial substitution of Ni by Mg on the structural, magnetic and spectroscopic properties of the double perovskite Sr2NiTeO6. Dalton Trans 2016; 45:14378-93. [PMID: 27546023 DOI: 10.1039/c6dt02473d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this report, the structural, magnetic and spectroscopic properties of the freeze-drying synthesized Sr2Ni1-xMgxTeO6 (x = 0.0, 0.1, 0.2, 0.3 and 0.5) oxides are analyzed by means of X-ray powder diffraction (XRPD) and neutron powder diffraction (NPD), electron paramagnetic resonance, diffuse reflectance and magnetic susceptibility. The XRPD and NPD data analysis using the mode-crystallography approach have revealed that at room temperature (RT), all the compositions are monoclinically distorted with the space group I2/m. The high and low temperature analyses have shown that these materials suffer a series of three structural phase transitions. The EPR results have shown that the spectra of all the compositions are centred at g≈ 2.28, indicating a slightly distorted octahedral environment of Ni(2+), which is in agreement with the crystal structure analysis. The increase of the Mg(2+) content in Sr2Ni1-xMgxTeO6, provokes a decrease of the dipolar interaction effects and thus, the resonance becomes narrower. This resonance does not completely disappear which leads to the idea that the long-range magnetic order is not completely established when x≥ 0.3. The substitution of the Ni(2+) (S = 1) ions by Mg(2+) (S = 0) ions, also induces a weakening of the antiferromagnetic interactions, which is reflected in the diminishing of the absolute value of θ and the Néel temperature TN. The magnetic structure determination revealed the existence of an antiferromagnetic coupling for x- and z-spin components of the nickel atoms.
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Affiliation(s)
- B Orayech
- CICenergigune, Albert Einstein 48, 01510 Miñano, Alava, Spain.
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Jiang P, Zhou Z, Gao W, Cong R, Yang T. B-site ordered double perovskite LaBa1-xSrxZnSbO6 (0 ≤ x ≤ 1): Sr(2+)-doping-induced symmetry evolution and structure-luminescence correlations. Dalton Trans 2016; 45:3949-57. [PMID: 26830374 DOI: 10.1039/c5dt04150c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The study of perovskites has been active for a long time. Here, we rationally designed and prepared a double perovskite, LaBaZnSbO6, by selecting Zn(2+) and Sb(5+) with large size and charge differences, and, indeed, complete B-site ordering can be achieved. Careful study using powder X-ray diffraction data pinpointed its space group to be I2/m, which has rarely been seen in double perovskites. Thereafter, an interesting observation of Sr(2+)-doping-induced symmetry evolution from I2/m to P21/n was confirmed in the complete solid solutions LaBa1-xSrxZnSbO6, where the tilting system also transferred from a(-)a(-)c(0) to a(-)a(-)c(+). The transition boundary is around x = 0.4. It can also be visualized by the variation of θ (defined as c/[(a + b)/2]), which is associated with the anisotropic shrinkage of the unit cell lattice and indeed shows a minimum at x = 0.4. Such a successive modulation of both the structural symmetry and the average La/Ba/Sr-O bond distances (revealed by Rietveld refinements) motivated us to study the Eu(3+) luminescence in La0.95Eu0.05Ba1-xSrxZnSbO6. Interestingly, the maximum of charge transfer absorption of Eu(3+) shows a precise changing tendency with the A-O bond distances along with the Sr(2+) doping, clearly revealing the structure-luminescence correlations.
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Affiliation(s)
- Pengfei Jiang
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, P. R. China.
| | - Zhengyang Zhou
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, P. R. China.
| | - Wenliang Gao
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, P. R. China.
| | - Rihong Cong
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, P. R. China.
| | - Tao Yang
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, P. R. China.
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Tsvetkov N, Lu Q, Chen Y, Yildiz B. Accelerated oxygen exchange kinetics on Nd2NiO(4+δ) thin films with tensile strain along c-axis. ACS NANO 2015; 9:1613-1621. [PMID: 25651454 DOI: 10.1021/nn506279h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The influence of the lattice strain on the kinetics of the oxygen reduction reaction (ORR) was investigated at the surface of Nd2NiO4+δ (NNO). Nanoscale dense NNO thin films with tensile, compressive and no strain along the c-axis were fabricated by pulsed laser deposition on single-crystalline Y0.08Zr0.92O2 substrates. The ORR kinetics on the NNO thin film cathodes was investigated by electrochemical impedance spectroscopy at 360-420 °C in air. The oxygen exchange kinetics on the NNO films with tensile strain along the c-axis was found to be 2-10 times faster than that on the films with compressive strain along the c-axis. A larger concentration of oxygen interstitials (δ) is found in the tensile NNO films compared to the films with no strain or compressive strain, deduced from the measured chemical capacitance. This is consistent with the increase in the distance between the NdO rock-salt layers observed by transmission electron microscopy. The surface structure of the nonstrained and tensile strained films remained stable upon annealing in air at 500 °C, while a significant morphology change accompanied by the enrichment of Nd was found at the surface of the films with compressive strain. The faster ORR kinetics on the tensile strained NNO films was attributed to the ability of these films to incorporate oxygen interstitials more easily, and to the better stability of the surface chemistry in comparison to the nonstrained or compressively strained films.
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Affiliation(s)
- Nikolai Tsvetkov
- Laboratory for Electrochemical Interfaces, ‡Department of Nuclear Science and Engineering, §Department of Materials Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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Abstract
A polycrystalline sample of La3Ni2SbO9 has been synthesized using a standard ceramic method and characterized by neutron diffraction and magnetometry. The compound adopts a monoclinic, perovskite-like structure with space group P2(1)/n and unit cell parameters a = 5.0675(1), b = 5.6380(1), c = 7.9379(2) Å, β = 89.999(6)° at room temperature. The two crystallographically distinct six-coordinate sites are occupied by Ni(2+) and a disordered distribution of Ni(2+)/Sb(5+), respectively; the Ni(2+) and Sb(5+) cations occupy the disordered site in a 1:2 ratio. Both ac and dc magnetometry indicate the presence of a spontaneous magnetization below 105 K. A magnetization of 1.5 μB per formula unit was measured at 2 K in a field of 40 kOe. However, no magnetic scattering was observed in neutron diffraction data collected at 5 K. It is proposed that, as a consequence of the cation disorder, La3Ni2SbO9 behaves as a relaxor ferromagnet, analogous to a relaxor ferroelectric, with magnetic domains too small to be detected by neutron diffraction forming below 105 K.
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Affiliation(s)
- Peter D Battle
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK.
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Muñoz-García AB, Bugaris DE, Pavone M, Hodges JP, Huq A, Chen F, zur Loye HC, Carter EA. Unveiling Structure–Property Relationships in Sr2Fe1.5Mo0.5O6−δ, an Electrode Material for Symmetric Solid Oxide Fuel Cells. J Am Chem Soc 2012; 134:6826-33. [DOI: 10.1021/ja300831k] [Citation(s) in RCA: 138] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ana B. Muñoz-García
- Department of Mechanical and
Aerospace Engineering, Program in Applied and Computational Mathematics,
and Gerhard R. Andlinger Center for Energy and the Environment, Princeton University, Princeton, New Jersey 08544,
United States
| | - Daniel E. Bugaris
- Department
of Chemistry and
Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Michele Pavone
- Department of Mechanical and
Aerospace Engineering, Program in Applied and Computational Mathematics,
and Gerhard R. Andlinger Center for Energy and the Environment, Princeton University, Princeton, New Jersey 08544,
United States
| | - Jason P. Hodges
- Neutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee
37831, United States
| | - Ashfia Huq
- Neutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee
37831, United States
| | - Fanglin Chen
- Department
of Mechanical Engineering, University of South Carolina, Columbia, South Carolina
29208, United States
| | - Hans-Conrad zur Loye
- Department
of Chemistry and
Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Emily A. Carter
- Department of Mechanical and
Aerospace Engineering, Program in Applied and Computational Mathematics,
and Gerhard R. Andlinger Center for Energy and the Environment, Princeton University, Princeton, New Jersey 08544,
United States
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Martín LOS, Chapman JP, Cuello G, González-Calbet J, Arriortua MI, Rojo T. Crystal Structure of the Ordered Double Perovskite, Sr2NiTeO6. Z Anorg Allg Chem 2005. [DOI: 10.1002/zaac.200570028] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Rodríguez E, López ML, Campo J, Veiga ML, Pico C. Crystal and magnetic structure of the perovskites La2MTiO6(M = Co, Ni). ACTA ACUST UNITED AC 2002. [DOI: 10.1039/b202504n] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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The Phase Diagram CaO–Al2O3–Ta2O5and the Crystal Structures of Ca2AlTaO6and CaAlTaO5. J SOLID STATE CHEM 1999. [DOI: 10.1006/jssc.1998.8079] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Battle PD, Frost JR, Kim SH. Magnetic properties of La2CuTi1–xRuxO6and La2ZnRuO6. ACTA ACUST UNITED AC 1995. [DOI: 10.1039/jm9950501003] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Gibb TC, Herod AJ, Peng N. Spin-glass behaviour in Sr2FeSnO6–y, studied by Mössbauer spectroscopy. ACTA ACUST UNITED AC 1995. [DOI: 10.1039/jm9950500091] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Battle PD, Gibb TC, Herod AJ, Hodges JP. Sol–gel synthesis of the magnetically frustrated oxides Sr2FeSbO6and SrLaFeSnO6. ACTA ACUST UNITED AC 1995. [DOI: 10.1039/jm9950500075] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Battle PD, Gibb TC, Herod AJ, Kim SH, Munns PH. Investigation of magnetic frustration in A2FeMO6(A Ca, Sr, Ba; M Nb, Ta, Sb) by magnetometry and Mössbauer spectroscopy. ACTA ACUST UNITED AC 1995. [DOI: 10.1039/jm9950500865] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Gibb TC. Investigation of the spin-glass Sr2FeNbO6by extended X-ray absorption fine structure and Mössbauer spectroscopy. ACTA ACUST UNITED AC 1993. [DOI: 10.1039/jm9930300441] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Gibb TC, Whitehead RJ. Order–disorder and magnetic clusters in some mixed-metal perovskites. ACTA ACUST UNITED AC 1993. [DOI: 10.1039/jm9930300591] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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