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Anomalous magnetic ordering transition and induced Raman scattering in BiFeO3 thin films

  • Manoj K Singh (a1), W Prellier (a2), H M Jang (a3) and Ram S Katiyar (a4)

Abstract

Low temperature magnetic properties and Raman spectrum of highly (111)-oriented rhombohedral BiFeO3 (BFO) thin films epitaxially grown on (111) SrTiO3 substrates by pulsed laser deposition have been studied. Zero field cooled (ZFC) and field cooled (FC) magnetization curves display divergence at characteristic temperature Tirr (H), which are magnetic field dependent, suggesting a spin-glass like behavior of the film. The change in magnetic ordering results in anomalous phonon behavior such as the extraordinary enhancement and appearance of new Raman modes due to Brillouin zone folding below ∼200 K.

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Anomalous magnetic ordering transition and induced Raman scattering in BiFeO3 thin films

  • Manoj K Singh (a1), W Prellier (a2), H M Jang (a3) and Ram S Katiyar (a4)

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