Ultrasonic study of perovskite manganites La1-xSrxMnO3

被引：15
|
作者：
Hazama, H
Nemoto, Y
Goto, T
Asamitsu, A
Tokura, Y
机构：
[1] Niigata Univ, Grad Sch Sci & Technol, Niigata 9502181, Japan
[2] Univ Tokyo, Cryogen Ctr, Tokyo 1130032, Japan
[3] Univ Tokyo, Dept Appl Phys, Tokyo 1138156, Japan
[4] JRCAT, Tsukuba, Ibaraki 3050046, Japan
来源：
PHYSICA B | 2000年 / 281卷
关键词：
(La; Sr); MnO3; Jahn-Teller effect; elastic constants;
D O I：
10.1016/S0921-4526(99)01127-8
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
In order to examine the electron-lattice interaction of perovskite manganites with orbital degrees of freedom, we have made the ultrasonic measurements on the hole-doped compounds of La1-xSrxMnO3 (x = 0.12, 0.165). The transverse elastic mode (C-11-C-12)/2 with e(g) symmetry for both x = 0.12 and 0.165 exhibits remarkable softening around the structural phase transition point T-S. This result is ascribed to the Jahn-Teller effect of the e(g) doublet, d(3z(2) - r(2)) and d(x(2) - y(2)), of Mn3+ ions. The elastic softening associated with the charge ordering of the doped Mn4+ in a sea of Mn3+ ions is also presented. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：487 / 488
页数：2
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