Cu doping effect on Mn sites of La2/3Ca1/3 MnO3 system

被引：2

作者：

Sun, X ^{[1
]}

Tang, P ^{[1
]}

Chen, Y ^{[1
]}

Huang, Z ^{[1
]}

Li, G ^{[1
]}

Liu, ZM ^{[1
]}

Chen, ZY ^{[1
]}

Wang, S ^{[1
]}

Yuan, SL ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Plasma Phys, High Field Magnet Lab, Hefei 230031, Peoples R China

来源：

CHINESE SCIENCE BULLETIN | 1998年 / 43卷 / 17期

关键词：

colossal magnetoresistance; Cu doping; transfer behavior; charge transfer;

D O I：

10.1007/BF02884121

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The temperature dependence of resistance and magnetoresistance at 77 K for Cu-doped La2/3Ca1/3Mn1-xCuxO3 have been investigated. Besides the transition similar to the Cu-free sample at similar to 260 K, a new transition at lower temperature appears for Cu-doped samples. The new transition moves toward low temperature with increasing of Cu content. A new conductive proceeding related to Cu ion may exist. Magnetoresistance at liquid nitrogen shows that MR increased three orders when x is changed from 0 to 0.15. Moreover, the main variation of magnetoresistance is below the field of 1 T.

引用

页码：1442 / 1447

页数：6

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