Thermal and electronic transport properties and two-phase mixtures in La5/8-xPrxCa3/8MnO3

被引：173
|
作者：
Kim, KH
Uehara, M
Hess, C
Sharma, PA
Cheong, SW
机构：
[1] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA
[2] Lucent Technol, Bell Labs, Murray Hill, NJ 07974 USA
来源：
PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 13期
关键词：
D O I：
10.1103/PhysRevLett.84.2961
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We measured thermal conductivity kappa, thermoelectric power S, ana electric conductivity a of La5/8-xPrxCa3/8MnO3, showing an intricate interplay between metallic ferromagnetism (FM) and charge ordering (CO) instability. The change of kappa, S, and sigma with temperature (T) and x agrees well with the effective medium theories for binary metal-insulator mixtures. This agreement clearly demonstrates that with the variation of T as well as x, the relative volumes of FM and CO phases drastically change and percolative metal-insulator transition occurs in the mixture of FM and CO domains.
引用
收藏
页码：2961 / 2964
页数：4
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