X-ray diffuse scattering study on charge-localized states of Pr1-xCaxMnO3 (x=0.35,0.4,0.5)

被引：34

作者：

Shimomura, S

Tonegawa, T

Tajima, K

Wakabayashi, N

Ikeda, N

Shobu, T

Noda, Y

Tamioka, Y

Tokura, Y

机构：

[1] Keio Univ, Fac Sci & Technol, Dept Phys, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan

[2] Japan Synchrotron Res Inst, Mikazuki, Hyogo 6975198, Japan

[3] Chiba Univ, Dept Phys, Chiba 2638522, Japan

[4] Tohoku Univ, Res Inst Sci Measurements, Aoba Ku, Sendai, Miyagi 9808577, Japan

[5] JRCAT, Tsukuba, Ibaraki 3058562, Japan

[6] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.62.3875

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

X-ray scattering measurements on Pr1-xCaxMnO3 (x=0.35,0.40,0.50) have revealed the existence of diffuse scattering above the charge and orbital ordering transition temperature (T-CO). The diffuse scattering has local intensity maxima at incommensurate positions (0,+/- zeta,0). With decreasing temperature, zeta increases from about 0.4, and it discontinuously changes to 0.5 at T-CO. Characteristic patterns of diffuse intensity distributions can be qualitatively interpreted by calculations based on distortion fields associated with the Jahn-Teller effect. The observed patterns are similar to those observed above the ferromagnetic insulator-metal transition temperature in (Nd0.125Sm0.875)(0.52)Sr0.48MnO3 reported previously.

引用

页码：3875 / 3878

页数：4

共 17 条

[1] CONSIDERATIONS ON DOUBLE EXCHANGE [J].