Tuning of colossal magnetoresistance via grain size change in La0.67Ca0.33MnO3
- 1 October 1999
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 86 (7) , 3881-3884
- https://doi.org/10.1063/1.371303
Abstract
In this article, we show how colossal magnetoresistanceeffect(CMR) can be tuned in polycrystalline mixed valence manganite La 0.67 Ca 0.33 MnO 3 via changing grain size by means of a sol-gel method. Below a critical diameter (150 nm), CMR disappears, but large intergrain MR remains even well above T c (1.2T c for ≈95 nm particles). Possible explanation for this effect involves single magnetic domain behavior in samples annealed at low temperature.This publication has 20 references indexed in Scilit:
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