Two Types of Charge Ordering in the Half-Doped Manganites of Bi0.5(Ca,Sr)0.5MnO3

被引：9

作者：

Horibe, Yoichi ^{[1
,2
]}

Ahn, Jai-Seok ^{[1
,2
,3
,4
]}

Sharma, Peter A. ^{[1
,2
]}

Mori, Shigeo ^{[5
]}

Chen, Cheng-Hsuan ^{[6
]}

Oh, Se-Jung ^{[3
,4
]}

Cheong, Sang-Wook ^{[1
,2
]}

机构：

[1] Rutgers State Univ, Rutgers Ctr Emergent Mat, Piscataway, NJ 08854 USA

[2] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[3] Seoul Natl Univ, Sch Phys, Seoul 151742, South Korea

[4] Seoul Natl Univ, Ctr Strongly Correlated Mat Res, Seoul 151742, South Korea

[5] Osaka Prefecture Univ, Dept Mat Sci, Osaka 5998531, Japan

[6] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 101, Taiwan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2009年 / 78卷 / 04期

关键词：

half-doped manganites; charge ordering; bicritical nature; ROOM-TEMPERATURE; STRIPES; LA0.5CA0.5MNO3; PHASE;

D O I：

10.1143/JPSJ.78.044704

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

From our study of the evolution of charge ordering in Bi0.5Ca0.5-xSrxMnO3 (x = 0-0.5) with chemical pressure, we Found the detailed nature of two distinct char-c ordering schemes, associated with the structural change from Pnma- to Imma-type symmetry at x = 0.2-0.25. Charge ordering for x = 0-0.2 (Pnma) is Consistent with the checkerboard-type pattern. commonly observed in half-doped manganites. On the other hand, a large tolerance factor for x = 0.25-0.5 (Imma) stabilizes a double-stripe charge ordering scheme. These findings indicate the bicritical nature of two competing charge ordered states and provide further insight towards understanding the dominant charge ordering mechanism in half-doped manganites.

引用

页数：3

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