Cation, Vacancy, and Spin Ordered 15R-Superstructures in Sr(Cr1-xFex)O3-y (0.4 ≤ x ≤ 0.6) Perovskites

被引：12

作者：

Arevalo-Lopez, Angel M. ^{[1
]}

Sher, Falak

Farnham, James ^{[1
]}

Watson, Adam J. ^{[1
]}

Attfield, J. Paul ^{[1
]}

机构：

[1] Univ Edinburgh, CSEC, Edinburgh EH9 3JZ, Midlothian, Scotland

来源：

CHEMISTRY OF MATERIALS | 2013年 / 25卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

perovskite oxides; magnetic structure; solid oxide fuel cells; CRYSTAL-STRUCTURE; OXIDE;

D O I：

10.1021/cm401062u

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

15-layer rhombohedral (15R) SrCrO2.8-type superstructures have been discovered in Sr(Cr1-xFex)O3-y perovskites (0.4 <= x <= 0.6; space group R (3) over barm; a approximate to 5.56 and c approximate to 34.6 angstrom). Cr/Fe cations are segregated between layers of tetrahedrally and octahedrally coordinated sites. The 15R-Sr(Cr1-xFex)O3-y materials are semiconducting and order ferrimagnetically below 225-342 K. The magnetic structure of an x = 0.5 sample shows spin canting consistent with a simple spin disorder model. Samples with x >= 0.7 have a disordered cubic perovskite structure, and we propose that locally reconstructed (111) planes like those in the 15R materials facilitate oxide ion migration in Cr-based perovskite mixed conductors used in solid oxide fuel cells.

引用

页码：2346 / 2351

页数：6

共 23 条

[1] BaMnO3-x revisited:: A structural and magnetic study [J].

Adkin, Josephine J. ;

Hayward, Michael A. .

CHEMISTRY OF MATERIALS, 2007, 19 (04) :755-762

[2] "Hard-Soft" Synthesis of SrCrO3-d Superstructure Phases [J].

Arevalo-Lopez, Angel M. ;

Rodgers, Jennifer A. ;

Senn, Mark S. ;

Sher, Falak ;

Farnham, James ;

Gibbs, William ;

Attfield, J. Paul .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2012, 51 (43) :10791-10794

[3] Charge ordering in transition metal oxides [J].

Attfield, J. Paul .

SOLID STATE SCIENCES, 2006, 8 (08) :861-867

[4] PREPARATION AND CRYSTAL-STRUCTURES OF LA2CU1-XLIXO4 SOLID-SOLUTIONS AND EVIDENCE FOR A NEW OXIDE WITH A DEFECT K2NIF4 STRUCTURE - LA4LI2O7 [J].

ATTFIELD, JP ;

FEREY, G .

JOURNAL OF SOLID STATE CHEMISTRY, 1989, 80 (01) :112-119

[5] Electrosynthesis and crystal structure of the new 15R hexagonal perovskite Ba5MnNa2V2O13 [J].

Bendraoua, A ;

Quarez, E ;

Abraham, F ;

Mentré, O .

JOURNAL OF SOLID STATE CHEMISTRY, 2004, 177 (4-5) :1416-1424

[6] BOND-VALENCE PARAMETERS OBTAINED FROM A SYSTEMATIC ANALYSIS OF THE INORGANIC CRYSTAL-STRUCTURE DATABASE [J].

BROWN, ID ;

ALTERMATT, D .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1985, 41 (AUG) :244-247

[7] Recent Progress in the Development of Anode Materials for Solid Oxide Fuel Cells [J].

Cowin, Peter I. ;

Petit, Christophe T. G. ;

Lan, Rong ;

Irvine, John T. S. ;

Tao, Shanwen .

ADVANCED ENERGY MATERIALS, 2011, 1 (03) :314-332

[8] 15R SrMn1-xFexO3-δ (x≈0.1);: A new perovskite stacking sequence [J].

Cussen, EJ ;

Sloan, J ;

Vente, JP ;

Battle, PD ;

Gibb, TC .

INORGANIC CHEMISTRY, 1998, 37 (23) :6071-6077

[9] DETERMINATION OF COORDINATION NUMBERS AND OXIDATION-STATES IN CHROMIUM OXIDES BY EXTENDED X-RAY ABSORPTION FINE-STRUCTURE SPECTROSCOPY [J].

GIBB, TC .

JOURNAL OF MATERIALS CHEMISTRY, 1992, 2 (01) :57-64

[10] INVESTIGATION OF DEFECT ORDERING IN THE PEROVSKITE SYSTEM SRCR0.1FE0.9O3-Y BY MOSSBAUER-SPECTROSCOPY [J].

GIBB, TC .

JOURNAL OF MATERIALS CHEMISTRY, 1991, 1 (01) :23-28

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