Compositional Dependence of Exchange Anisotropy in PtxMn100-x/CoyFe100-y Films

研究成果: Article査読

4 被引用数 (Scopus)


Bilayer films consisting of a 15 nm thick PtxMn100-x (x = 48 or 15) layer and a 2 nm thick Coy Fe100-y (0 ≤ y ≤ 90) layer were fabricated by ultrahigh-vacuum magnetron sputtering. The Pt48Mn52 and Pt15Mn85 films consisted of face-centered tetragonal (FCT) and face-centered cubic (FCC) structures, respectively. The effect of composition of CoFe films on the unidirectional anisotropy constant (Jk) in the PtxMn100-x/CoyFe100-y bilayer films and the optimum conditions for producing large Jkwere determined. The FCT and FCC PtMn films annealed at 370 °C for 6 h both exhibited maximum Jkwhen the film composition was Co70Fe30. Blocking temperatures of the FCT and FCC PtMn films were 410 °C and 160 °C, respectively. All the bilayer films possess flat surfaces. These results indicate that the obtained Pt-Mn films-with low roughness, high exchange bias, and high blocking temperature-will be practical candidates as the antiferromagnetic layer in spintronic devices.

ジャーナルIEEE Magnetics Letters
出版ステータスPublished - 2019

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料


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