High-pressure structural analysis of (Nd,Sm)1/2Sr1/2MnO3:: Origin for pressure-induced charge ordering -: art. no. 113105

被引：9

作者：

Kuriki, A

Moritomo, Y ^{[1
]}

Machida, A

Nishibori, E

Takata, M

Sakata, M

Ohishi, Y

Shimomura, O

Nakamura, A

机构：

[1] Nagoya Univ, Ctr Integrated Res Sci & Engn, Nagoya, Aichi 4648601, Japan

[2] Nagoya Univ, Dept Crystalline Mat Sci, Nagoya, Aichi 4648603, Japan

[3] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan

[4] JASRI, SPring 8, Mikazuki, Hyogo 6795198, Japan

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.65.113105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pressure effects on the structural parameters are investigated in a half-doped manganites (Nd0.125Sm0.875)(1/2)Sr1/2MnO3, by means of the synchrotron-radiation x-ray powder diffraction measurement. The compound shows a pressure-induced metal-insulator transition due to the subtle competition between the double-exchange interaction and the charge-ordering instability [Y. Tokura et al., Phys. Rev. Lett. 76, 3184 (1996)]. We have found that application of pressure induces the four-long and two-short deformation of the MnO6 octahedra. We present a possible scenario for the pressure-induced charge-ordering.

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页码：1 / 4

页数：4

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