Enhancement of exchange bias by ultra-thin Mn layer insertion at the interface of Mn-Ir/Co-Fe bilayers

M. Tsunoda, S. Yoshitaki, Y. Ashizawa, D. Y. Kim, C. Mitsumata, Migaku Takahashi

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Effects of ultra-thin Mn, Ru, Pd, Ta, Gd, and Tb layer insertion at the interface on the exchange bias of Mn75Ir25ZCo 70Fe30 bilayers were investigated. Unidirectional anisotropy constant, JK, of the bilayer was significantly enhanced from 0.46 erg/cm2 to 0.84 erg/cm2 with the insertion of 0.5-nm-thick Mn layer, while it was reduced with increasing the inserted layer thickness for the other materials. The value of 0.84 erg/cm2 was not obtained in the variation of JK with respect to the chemical composition of Mn-Ir layer in a range of Ir content of 0 - 40 at.%. The cause of the enhancement of JK with ultra-thin Mn insertion might be due to the modification of antiferromagnetic spin structure at the interface.

Original languageEnglish
Pages (from-to)4470-4473
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume244
Issue number12
DOIs
Publication statusPublished - 2007 Dec 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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