Charge and structural ordering in the brownmillerite phases:: La1-xSrxMnO2.5 (0.2<x<0.4)

被引：25

作者：

Casey, Peter S. ^{[1
]}

Barker, Daniel ^{[1
]}

Hayward, Michael A. ^{[1
]}

机构：

[1] Univ Oxford, Inorgan Chem Lab, Dept Chem, Oxford OX1 3QR, England

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2006年 / 179卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

brownmillerite; topotactic reduction; manganese;

D O I：

10.1016/j.jssc.2006.01.049

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The topotactic reduction of La1-xSrxMnO3 (0.2<x<0.4) perovskite phases to the corresponding, La1-xSrxMnO2.5 brownmillerite phases with NaH is described. Neutron and electron diffraction data show the x = 0.25 and 0.2 phases adopt structures with an unusual ordered L-R-L-R alternation of twisted chains of Mn(II) tetrahedra within each anion-deficient layer. This is accompanied by Mn(II)/ (III) charge ordering within the remaining MnO6 octahedral layers. In contrast. the x = 0.4 phase adopts a structure in which the twisted chains of tetrahedra are disordered. (C) 2006 Elsevier Inc. All rights reserved.

引用

页码：1375 / 1382

页数：8

共 22 条

[1] Compositionally induced phase transition in the Ca2MnGa1-xAlxO5 solid solutions:: Ordering of tetrahedral chains in brownmillerite structure [J].

Abakumov, AM ;

Kalyuzhnaya, AS ;

Rozova, MG ;

Antipov, EV ;

Hadermann, J ;

Van Tendeloo, G .

SOLID STATE SCIENCES, 2005, 7 (07) :801-811

[2] Ordering of tetrahedral chains in the Sr2MnGaO5 brownmillerite [J].

Abakumov, AM ;

Alekseeva, AM ;

Rozova, MG ;

Antipov, EV ;

Lebedev, OI ;

Van Tendeloo, G .

JOURNAL OF SOLID STATE CHEMISTRY, 2003, 174 (02) :319-328

[3] Synthesis, crystal structure, and magnetic properties of a novel layered manganese oxide Sr2MnGaO5+δ [J].

Abakumov, AM ;

Rozova, MG ;

Pavlyuk, BP ;

Lobanov, MV ;

Antipov, EV .

JOURNAL OF SOLID STATE CHEMISTRY, 2001, 160 (02) :353-361

[4] Synthesis and crystal structure of novel layered manganese oxide Ca2MnGaO5+δ [J].

Abakumov, AM ;

Rozova, MG ;

Pavlyuk, BP ;

Lobanov, MV ;

Antipov, EV ;

Lebedev, OI ;

Van Tendeloo, G ;

Sheptyakov, DV ;

Balagurov, AM ;

Bourée, F .

JOURNAL OF SOLID STATE CHEMISTRY, 2001, 158 (01) :100-111

[5] DETERMINATION OF STOICHIOMETRY IN LANTHANUM STRONTIUM MANGANATES(III)(IV) BY WET CHEMICAL METHODS [J].

ANDERSEN, IGK ;

ANDERSEN, EK ;

NORBY, P ;

SKOU, E .

JOURNAL OF SOLID STATE CHEMISTRY, 1994, 113 (02) :320-326

[6] Crystal structure and magnetic properties of SrCaMnGaO5+δ [J].

Battle, PD ;

Bell, AMT ;

Blundell, SJ ;

Coldea, AI ;

Gallon, DJ ;

Pratt, FL ;

Rosseinsky, MJ ;

Steer, CA .

JOURNAL OF SOLID STATE CHEMISTRY, 2002, 167 (01) :188-195

[7] BOND-VALENCE PARAMETERS FOR SOLIDS [J].

BRESE, NE ;

OKEEFFE, M .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1991, 47 :192-197

[8] 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

[9] MAGNETORESISTANCE IN MAGNETIC MANGANESE OXIDE WITH INTRINSIC ANTIFERROMAGNETIC SPIN STRUCTURE [J].

CHAHARA, K ;

OHNO, T ;

KASAI, M ;

KOZONO, Y .

APPLIED PHYSICS LETTERS, 1993, 63 (14) :1990-1992

[10] Synthesis and characterization of the reduced double-layer manganite Sr3Mn2O6+x [J].

Gillie, LJ ;

Wright, AJ ;

Hadermann, J ;

Van Tendeloo, G ;

Greaves, C .

JOURNAL OF SOLID STATE CHEMISTRY, 2003, 175 (02) :188-196

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Charge and structural ordering in the brownmillerite phases:: La1-xSrxMnO2.5 (0.2&lt;x&lt;0.4)

Charge and structural ordering in the brownmillerite phases:: La1-xSrxMnO2.5 (0.2<x<0.4)