nd掺杂LaCaMnO3多晶陶瓷的巨磁阻

IF 0.9 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Processing and Application of Ceramics Pub Date : 2021-01-01 DOI:10.2298/PAC2101095R

Sam Rajan, K. V. A. Kumar, Jayakumari Isac

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引用次数: 1

摘要

采用常规固相反应法制备了阳离子掺杂多晶化合物La0.5Nd0.15Ca0.35MnO3。粉末XRD的Rietveld分析显示复合材料具有Pbnm空间群对称的正交结构。单元格参数为a = 5.4505 ?， b = 5.4457 ?c = 7.6876?交流磁化研究表明，在低于居里温度TC的温度下，半导体顺磁性转变为金属铁磁性，温度为206.3 3k。还观察到金属到半导体的转变温度TMS非常接近TC。该样品还具有高磁阻，这是在磁共振研究中发现的。

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Colossal magnetoresistance of Nd-doped LaCaMnO3 polycrystalline ceramics

The cation doped polycrystalline compound La0.5Nd0.15Ca0.35MnO3 has been synthesized by a conventional solid state reaction method. The Rietveld analysis of the powder XRD of the composites reveals an orthorhombic structure with Pbnm space group symmetry. The cell parameters are a = 5.4505 ?, b = 5.4457 ? and c = 7.6876?. The AC magnetization studies show a semiconducting paramagnetic to metallic ferromagnetic transition at a temperature below the Curie temperature TC which is found to be 206.3K. It is also observed that metal to semiconductor transition temperature TMS is very close to TC. The sample also possesses high magnetoresistance, which is revealed in MR studies.

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来源期刊

Processing and Application of Ceramics MATERIALS SCIENCE, CERAMICS-

CiteScore

1.90

自引率

9.10%

发文量

审稿时长

10 weeks

期刊介绍： Information not localized