Charge/orbital ordering structure in ordered perovskite SM1/2Ba1/2MnO3

被引:30
作者
Uchida, M [1 ]
Akahoshi, D
Kumai, R
Tomioka, Y
Arima, T
Tokura, Y
Matsui, Y
机构
[1] Natl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan
[2] Natl Inst Adv Ind Sci & Technol, Correlated Electron Res Ctr, AIST, Tsukuba, Ibaraki 3058562, Japan
[3] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan
[4] Natl Inst Adv Ind Sci & Technol, ERATO, Spin Superstruct Project, JST,AIST, Tsukuba, Ibaraki 3058562, Japan
[5] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan
关键词
Sm1/2Ba1/2MnO3; perovskite manganites; charge ordering; orbital ordering; electron diffraction; resonant X-ray scattering;
D O I
10.1143/JPSJ.71.2605
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In an A-site ordered perovskite marganite Sm1/2Ba1/2MnO3, a new charge/orbital ordering pattern was found at room temperature. Electron diffraction studies revealed a series of superlattice reflections with modulation vectors at q(2) = (1/2, 1/2, 1/2) as well as at q(1) = (1/4, 1/4, 0) in the tetragonal setting (a(p) x a(p) x 2a(p), a(p) being the cubic perovskite lattice parameter). Together with the results of the resonant X-ray scattering and the charge-transport and magnetization measurements, a new model for the three-dimensional charge/orbital ordering in the ordered perovskite is proposed.
引用
收藏
页码:2605 / 2608
页数:4
相关论文
共 10 条
[1]  
AKAHOSHI D, UNPUB
[2]  
ARIMA T, UNPUB
[3]   Commensurate to incommensurate charge ordering and its real-space images in La0.5Ca0.5MnO3 [J].
Chen, CH ;
Cheong, SW .
PHYSICAL REVIEW LETTERS, 1996, 76 (21) :4042-4045
[4]   Colossal magnetoresistant materials: The key role of phase separation [J].
Dagotto, E ;
Hotta, T ;
Moreo, A .
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2001, 344 (1-3) :1-153
[5]   Order-disorder phenomena in new LaBaMn2O6-x CMR perovskites.: Crystal and magnetic structure [J].
Millange, F ;
Caignaert, V ;
Domenges, B ;
Raveau, B ;
Suard, E .
CHEMISTRY OF MATERIALS, 1998, 10 (07) :1974-1983
[6]   Successive phase transitions in a metal-ordered manganite perovskite YBaMn2O6 [J].
Nakajima, T ;
Kageyama, H ;
Ueda, Y .
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2002, 63 (6-8) :913-916
[7]   The route to CMR manganites: what about charge ordering and phase separation? [J].
Raveau, B ;
Hervieu, M ;
Maignan, A ;
Martin, C .
JOURNAL OF MATERIALS CHEMISTRY, 2001, 11 (01) :29-36
[8]   Colossal magnetoresistive manganites [J].
Tokura, Y ;
Tomioka, Y .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 200 (1-3) :1-23
[9]   The structure of approximant μ-Al4Mn interpreted as a modulated crystal [J].
Uchida, M ;
Horiuchi, S .
JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1999, 32 :417-420
[10]   CHARGE-DENSITY WAVES AND SUPERLATTICES IN METALLIC LAYERED TRANSITION-METAL DICHALCOGENIDES [J].
WILSON, JA ;
DISALVO, FJ ;
MAHAJAN, S .
ADVANCES IN PHYSICS, 1975, 24 (02) :117-201