The evidence of phase separation in perovskite manganites aboveTc

A series of bulk ceramic samples of La1−x CaxMn03 and Y1−x CaxMnO3 was prepared by the conventional solid state reaction method, and the samples of x = 1/3 were investigated particularly. The colossal magnetoresistance phenomenon and the properties of magnetic and transport were studied in detail by...

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Bibliographic Details
Published in:Journal of Wuhan University of Technology. Materials science edition 2004-01, Vol.19 (2), p.62-63
Main Authors: Hong-wei, Tian, Jian-Feng, Zang, Ding, Tao, Wei-tao, Zheng, Wang, Xin
Format: Article
Language:English
Subjects:
Colossal magnetoresistance
Inhomogeneity
Low temperature resistance
Magnetic permeability
Magnetic properties
Magnetoresistivity
Perovskites
Phase separation
Room temperature
X-ray scattering
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Summary:A series of bulk ceramic samples of La1−x CaxMn03 and Y1−x CaxMnO3 was prepared by the conventional solid state reaction method, and the samples of x = 1/3 were investigated particularly. The colossal magnetoresistance phenomenon and the properties of magnetic and transport were studied in detail by the experiments of magnetic susceptibility and low temperature resistance. Small angle X-ray scattering (SAXS) was used to investigate the charge inhomogeneities in our samples at room temperature for the first time, and phase separation and colossal magnetoresistance phenomena induced by charge inhomogeneities above Tc were discovered.
ISSN:1000-2413
1993-0437
DOI:10.1007/BF03000171