Anomalous magnetization reversal due to proximity effect of antiphase boundaries

R. G S Sofin, Han Chun Wu, I. V. Shvets

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15 Citations (Scopus)

Abstract

Here we report anomalous double switching hysteresis loop and high coercivity (∼0.1 T) in Fe 3O 4(110) thin films. Our analytical model based on spin chains confined within small antiphase boundary domains (APBDs) suggests a significant proximity effect of antiferromagnetic antiphase boundaries (APBs). Furthermore, the calculated domain size (D) follows the well-known scaling relation D=C√t. The results suggest that the interface exchange coupling between neighboring magnetic domains through antiferromagnetic APBs is responsible for the double switching hysteresis. Our findings could help advance the studies of anomalous properties of magnetic materials originating from growth defects. This effect can be utilized for the tunability of exchange bias in devices.

Original languageEnglish
Article number212403
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number21
DOIs
Publication statusPublished - Dec 8 2011

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ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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