Giant 1/f noise in perovskite manganites:: Evidence of the percolation threshold

被引：102
|
作者：
Podzorov, V
Uehara, M
Gershenson, ME
Koo, TY
Cheong, SW
机构：
[1] Rutgers State Univ, Serin Phys Lab, Piscataway, NJ 08854 USA
[2] Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA
来源：
PHYSICAL REVIEW B | 2000年 / 61卷 / 06期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevB.61.R3784
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We discovered an unprecedented magnitude of the 1/f noise near the Curie temperature (T-c) in low-T-c manganites. The scaling behavior of the 1/f noise and resistance provides strong evidence of the percolation nature of the ferromagnetic transition in the polycrystalline samples. The steplike changes of the resistance with temperature, observed for single crystals, suggest that the size of the ferromagnet ic domains depends on the size of crystallites.
引用
收藏
页码：R3784 / R3787
页数：4
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