1/f noise properties of a La1-xCaxMnO3 thin film

被引：10

作者：

Arora, SK ^{[1
]}

Kumar, R

Kanjilal, D

Bathe, R

Patil, SI

Ogale, SB

Mehta, GK

机构：

[1] Ctr Nucl Sci, New Delhi 100067, India

[2] Univ Poona, Dept Phys, Poona 411007, Maharashtra, India

[3] Univ Maryland, Dept Phys, Ctr Superconduct Res, College Pk, MD 20742 USA

来源：

SOLID STATE COMMUNICATIONS | 1998年 / 108卷 / 12期

关键词：

thin films; magnetically ordered materials; electronic transport;

D O I：

10.1016/S0038-1098(98)00484-0

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Voltage noise studies of the La0.75Ca0.25MnO3 (LCMO) thin film in the low frequency region are presented. The observed noise arises due to the resistance fluctuations and its magnitude fellows a power law of the 1/f form. The magnitude of the 1/f noise and the value of the Hooge's parameter in the paramagnetic (PM) and ferromagnetic metallic states (FMM) are found to be much larger than that of metals and semiconductors. The large magnitude of the 1/f noise observed in the FMM state suggests that the contribution of strong Jahn-Teller distortions is significant. Temperature dependence of the normalized noise shows a phase transformation from the PM state to FMM state. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：959 / 963

页数：5

共 25 条

[1] 1/f resistance noise in the large magnetoresistance manganites [J].