Relaxation between charge order and ferromagnetism in manganites: Indication of structural phase separation

被引：92
作者：
Uehara, M
Cheong, SW
机构：
[1] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA
[2] Yokohama Natl Univ, Fac Engn, Dept Phys, Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan
[3] Lucent Technol, Bell Labs, Murray Hill, NJ 07974 USA
来源：
EUROPHYSICS LETTERS | 2000年 / 52卷 / 06期
关键词：
D O I：
10.1209/epl/i2000-00491-5
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have investigated two regions of manganite phase space; one where ferromagnetic (FM), metallic and charge-ordered (CO), insulating phases become the ground and high-temperature states, respectively, and the other with the reversed order. We found that the coexistence of FM and CO phases in broad temperature ranges carl be drastically influenced by cooling rate and also aging, showing the presence of slow relaxation. Our results can be understood in terms with free energy analysis combined with long-range, anisotropic strain consideration, indicating that the coexistence of the distinct electronic phases is structural in origin.
引用
收藏
页码：674 / 680
页数：7
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