Magnetically correlated internal friction and Young's modulus in La(Y)-Ca-Mn-O perovskites

被引：31
|
作者：
Li, KB
Li, XJ
Liu, CS
Zhu, ZG
Du, JJ
Hou, DL
Nie, XF
Zhu, JS
Zhang, YH
机构：
[1] UNIV SCI & TECHNOL CHINA,STRUCT RES LAB,HEFEI 230026,PEOPLES R CHINA
[2] HEBEI TEACHERS COLL,DEPT PHYS,SHIJIAZHUANG,PEOPLES R CHINA
来源：
PHYSICAL REVIEW B | 1997年 / 56卷 / 21期
关键词：
D O I：
10.1103/PhysRevB.56.13662
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Internal friction (Q(-1)) and Young's modulus have been studied on a series of La1-xCaxMnO3-delta and La0.6Y0.07Ca0.33MnO3-delta polycrystals. A Q(-1) peak originating from the changes of the magnetic entropy is observed. The Q(-1) peak for x in the range of 0<x<0.5 can be correlated with a transition from a paramagnetic (PM) disordered state to a ferromagnetic (FM) ordered state accompanied by a cooperative Jahn-Teller lattice distortion; from a PM insulator to a spin-glass insulator and accompanied with a large loss of modulus for 0.5<x<1.0; and the Q(-1) peak is ascribed to a transition from a PM to an AFM insulator for x=1.0.
引用
收藏
页码：13662 / 13665
页数：4
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