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Magnetization reversal in bulk and thin films of the ferrimagnetic ErCo0.50Mn0.50O3perovskite

Authors
Journal
Journal of Magnetism and Magnetic Materials
0304-8853
Publisher
Elsevier
Publication Date
Volume
321
Issue
11
Identifiers
DOI: 10.1016/j.jmmm.2009.02.022
Keywords
  • Thin Film
  • Spin Reversal
  • Exchange Interaction
  • Magnetic Oxide

Abstract

Abstract We present herein a comparison of the magnetic properties of bulk ceramics and thin films of the ferrimagnetic ErCo 0.50Mn 0.50O 3 compound. Epitaxial thin films were deposited onto (1 0 0) SrTiO 3 substrates by pulsed-laser ablation while bulk ceramics were prepared by solid state reaction. When cooling under low applied fields, a spin reversal is observed in both thin film and bulk due to the competition between two magnetic sublattices (Co/Mn and Er) coupled by a negative exchange interaction. Original features are observed in the M( H) loops for bulk materials: abrupt jumps at 4 T due to a reorientation of domains, while in the low field region, the increasing and decreasing branches of the magnetization intersect each other. In the thin film, the ordering temperature increased from 69 to 75 K, and the ZFC anomaly (AF transition) became sharper, compared to the bulk specimen. The oxygen content and the microstructure are crucial to observe the intersection of the magnetization branches.

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