Optical and magnetic properties of CuMnO2 epitaxial thin films with a delafossite-derivative structure

H. Hiraga, T. Fukumura, A. Ohtomo, T. Makino, A. Ohkubo, H. Kimura, M. Kawasaki

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24 Citations (Scopus)

Abstract

A distorted delafossite CuMnO2, called crednerite, was formed into epitaxial thin films on MgAl2 O4 (111) substrates by pulsed laser deposition method. X-ray diffraction revealed that the films had high crystalline quality with epitaxial relationship of CuMnO2 (001) // MgAl2 O4 (111) and CuMnO2 [100] // MgAl 2 O4 〈11-2〉. The ultraviolet-visible optical response revealed a distinct absorption peak at 4.5 eV presumably with excitonic nature and broad peaks at 3.0 and 3.7 eV assignable to O 2p-Mn 3d charge transfer excitation. Small magnetic hysteresis with remanent magnetization of 0.04 μB/Mn was observed below 20 K, representing canted antiferromagnetic spin ordering.

Original languageEnglish
Article number032109
JournalApplied Physics Letters
Volume95
Issue number3
DOIs
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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