Reduction in conduction noise of La-Ca-Mn-O polycrystalline films due to Ag addition

被引：13

作者：

Khare, N

Moharil, UP

Gupta, AK

Singh, HK

Srivastava, ON

机构：

[1] Natl Phys Lab, New Delhi 110012, India

[2] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India

来源：

JOURNAL OF APPLIED PHYSICS | 2001年 / 89卷 / 06期

关键词：

D O I：

10.1063/1.1342187

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ag-added La0.67Ca0.33MnO3(Ag-LCMO) polycrystalline films have been prepared on SrTiO3 substrates by the ultrasonic spray pyrolysis technique and their properties are compared with the La0.67Ca0.33MnO3(LCMO) films prepared under similar conditions. Addition of Ag in LCMO films improves their surface morphology and reduces their lattice constant. During the synthesis process, Ag in Ag-LCMO film melts and segregates to grain boundaries. In the Ag-LCMO film, normalized voltage noise reduces by more than one order of magnitude, and peak temperature (T-p) and ferromagnetic transition temperature (T-c) increase by 10 and 20 K, respectively. Improvement in surface morphology and better oxygenation of the film due to the presence of Ag leads to reduction in conduction noise of the LCMO film. (C) 2001 American Institute of Physics.

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页码：3532 / 3534

页数：3

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