Uncompensated antiferromagnetic spins at the interface in Mn-Ir based exchange biased bilayers

M. Tsunoda, S. Yoshitaki, Y. Ashizawa, C. Mitsumata, T. Nakamura, H. Osawa, T. Hirono, D. Y. Kim, Migaku Takahashi

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


The microscopic origin of the uncompensated antiferromagnetic (AFM) spins was investigated by means of the x-ray magnetic circular dichroism (XMCD) spectroscopy with transmission mode for Mn-Ir/ferromagnetic (FM) bilayers. As the AFM layer thickness increases, resonant absorption magnitude of Mn L edge naturally increases, but the XMCD magnitude does not change so much. When the FM layer material is modified, the XMCD signal of Mn L edge drastically changes not only in its magnitude but also in its sign. The XMCD signal vanishes without the FM layer. These facts clearly mean that the uncompensated Mn components are induced through the exchange interaction between the FM and the AFM layers and are localized at the very interface. Micromagnetic simulation within the framework of the classical Heisenberg model well supported the above conclusion.

Original languageEnglish
Article number09E510
JournalJournal of Applied Physics
Issue number9
Publication statusPublished - 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)


Dive into the research topics of 'Uncompensated antiferromagnetic spins at the interface in Mn-Ir based exchange biased bilayers'. Together they form a unique fingerprint.

Cite this