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

页码：13662 / 13665

页数：4

共 26 条

[1] PRESSURE EFFECT ON YTTRIUM DOPED LA0.60Y0.07CA0.33MNO3 COMPOUND [J].