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

Strongly Correlated Electrons 2009-11-11 v1
Authors: J. Rivas , J. Mira , B. Rivas-Murias , A. Fondado , J. Dec , W. Kleemann , M. A. Senaris Rodriguez
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Abstract

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.

Keywords

La2/3Ca1/3MnO3 dielectric constant magnetic field dependence space-charge polarization interfacial polarization Curie temperature

Cite

@article{arxiv.cond-mat/0603660,
  title  = {Magnetic field-dependent dielectric constant in La2/3Ca1/3MnO3},
  author = {J. Rivas and J. Mira and B. Rivas-Murias and A. Fondado and J. Dec and W. Kleemann and M. A. Senaris Rodriguez},
  journal= {arXiv preprint arXiv:cond-mat/0603660},
  year   = {2009}
}

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