Equilibrium surface magnetization of α-Cr2O3 studied through interfacial chromium magnetization in Co/α-Cr2O3 layered structures

Kentaro Toyoki, Yu Shiratsuchi, Tetsuya Nakamura, Chiharu Mitsumata, Shotaro Harimoto, Yuichiro Takechi, Takashi Nishimura, Hikaru Nomura, Ryoichi Nakatani

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29 Citations (Scopus)

Abstract

We show experimental evidence of the equilibrium surface magnetization of α-Cr2O3(0001) by studying chromium magnetization at the Co(111)/ α-Cr2O3(0001) interface. The soft X-ray magnetic circular dichroism intensity from uncompensated Cr spins was found to be almost independent of the interface roughness and exchange anisotropy energy. Moreover, no exchange bias training effect was found, except in the transition temperature regime, suggesting that the antiferromagnetic spin structure, including the interface spin arrangement, is in equilibrium. Furthermore, the exchange bias polarity was switched by magnetoelectric field cooling, which is also a salient feature of the surface magnetization of α-Cr2O3(0001).

Original languageEnglish
Pages (from-to)114201
Number of pages1
JournalApplied Physics Express
Volume7
Issue number11
DOIs
Publication statusPublished - 2014 Nov 1
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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