Anomalous magnetoconductivity of epitaxial Nd0.7Sr0.3MnO3 and Pr0.7Sr0.3MnO3 films

G. C. Xiong, S. M. Bhagat, Q. Li, M. Domínguez, H. L. Ju, R. L. Greene, T. Venkatesan, Jeff M. Byers, Mark Rubinstein

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Abstract

In Nd0.7Sr0.3MnO3 films, ranging in peak resistivity from 1000 Ω-cm to ≤1 Ω-cm, and exhibiting large magnetoresistance effects, the zero-field resistivity above the peak temperature Tp exhibits thermally activated behavior with an activation energy of 0.115±0.005 eV. At T well below Tp, the magnetoconductivity, rather than the magnetoresistance, is linear in B and this linear dependence is observed over a wide B range even when the magnetization is essentially saturated. A cross-over from the linear relation to σ increasing as B2 is observed near and above Tp. A tentative model is proposed.

Original languageEnglish
Pages (from-to)599-604
Number of pages6
JournalSolid State Communications
Volume97
Issue number7
DOIs
Publication statusPublished - 1996 Feb

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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    Xiong, G. C., Bhagat, S. M., Li, Q., Domínguez, M., Ju, H. L., Greene, R. L., Venkatesan, T., Byers, J. M., & Rubinstein, M. (1996). Anomalous magnetoconductivity of epitaxial Nd0.7Sr0.3MnO3 and Pr0.7Sr0.3MnO3 films. Solid State Communications, 97(7), 599-604. https://doi.org/10.1016/0038-1098(95)00715-6