Sol–gel epitaxial growth of La1−xCaxMnO3 with colossal magnetoresistance effect
- 1 July 1996
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 69 (1) , 121-123
- https://doi.org/10.1063/1.118095
Abstract
The successful sol–gel growth of colossal magnetoresistive La‐Ca‐Mn‐O powder and epitaxial thin film is reported. Homogeneous powders were prepared at a temperature of 315 °C and epitaxial thin films were obtained on MgO(100) and LaAlO3(100) through heat treatment at 700–950 °C. A transition from semiconductor (negative dρ/dT) to metal (positive dρ/dT) was observed at 225 K, which was located in proximity to the magnetic transition temperature (Tc) of 228 K. A peak magnetoresistance ratio of ∼900% occurred at 220 K.Keywords
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