Anomalous lattice distortion in Pr-substituted double-layered perovskite manganite La1.2Sr1.8Mn2O7 single crystals:: II

被引：6

作者：

Matsukawa, M ^{[1
]}

Ogasawara, H

Sasaki, T

Yoshizawa, M

Apostu, M

Suryanarayanan, R

Revcolevschi, A

Itoh, K

Kobayashi, N

机构：

[1] Iwate Univ, Dept Mat Sci & Technol, Morioka, Iwate 0208551, Japan

[2] Univ Paris 11, CNRS, UMR 8648, Lab Phys Chim Etat Solide, F-91405 Orsay, France

[3] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050003, Japan

[4] Tohoku Univ, Inst Mat Sci, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2002年 / 71卷 / 06期

关键词：

double-layered perovskite manganite; colossal magnetoresistance; giant magnetostriction; Pr substitution;

D O I：

10.1143/JPSJ.71.1475

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Thermal expansion and magnetostriction both in the ab-plane and along the c-axis of double-layered perovskite manganite (La1-zPr2)(1.2)Sr1.8Mn2O7 (z = 0, 0.2, 0.4 and 0.6) single crystals have been measured as a function of temperature and magnetic field. The anomalous lattice distortion and the giant magnetostriction associated with the CMR were observed near the PI to FM transition temperature T-c These findings indicate that the PI to FM transition and the CMR near T-c are not associated with the anisotropic lattice striction. concerning the static John-Teller effect but with the negative volume striction related to the delocalization of polarons to itinerant carriers.

引用

页码：1475 / 1480

页数：6

共 22 条

[1] First-order field-induced transition, magnetoresistance, and giant magnetostriction in single crystals of (La0.4Pr0.6)1.2Sr1.8Mn2O7 -: art. no. 012407 [J].