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arxiv: cond-mat/0603660 · v1 · submitted 2006-03-24 · ❄️ cond-mat.str-el

Magnetic field-dependent dielectric constant in La2/3Ca1/3MnO3

J. Rivas , J. Mira , B. Rivas-Murias , A. Fondado , J. Dec , W. Kleemann , M. A. Senaris Rodriguez This is my paper
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keywords abovedielectricmagneticmno3aroundattributeconstantcurie
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We report a rather high dependence of the dielectric permittivity on the magnetic field in La2/3Ca1/3MnO3. The variation is maximum at around 270 K, little above the Curie temperature, TC, and it reaches a 30% under only 0.5 T. We attribute this phenomenon to the space-charge or interfacial polarization produced between the insulator and the metallic regions segregated intrinsically in the material above TC.

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