Electron spectroscopic studies of colossal magnetoresistance material La1-xCaxMnO3

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • J. -H. Park
  • C. T. Chen
  • S.-W. Cheong
  • G. Meigs
  • V. Chakarian
  • Y. U. Idzerda

Detail(s)

Original languageEnglish
Pages (from-to)4558-4560
Journal / PublicationJournal of Applied Physics
Volume79
Issue number8
Publication statusPublished - 15 Apr 1996
Externally publishedYes

Abstract

High resolution photoemission measurements have been performed for the ferromagnetic transition of La0.67Ca0.33MnO3 and for the order-disorder transition of La0.4Ca0.6MnO3 . The band gap collapsed below the Curie temperature and the density of states at the Fermi level increases with cooling. Upon cooling through the order-disorder transition temperatures, TCO , the band gap increases by ∼50 meV. This change in the gap is consistent with the change in the activation energy above and below TCO estimated from conductivity data. We have also performed soft x-ray magnetic circular dichroism measurements at Mn L2,3 edges for ferromagnetic La0.67Ca0.33MnO3 and La0.8Ca0.2MnO3.

Citation Format(s)

Electron spectroscopic studies of colossal magnetoresistance material La1-xCaxMnO3. / Park, J. -H.; Chen, C. T.; Cheong, S.-W. et al.
In: Journal of Applied Physics, Vol. 79, No. 8, 15.04.1996, p. 4558-4560.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review