γ‐Mn‐Ir/Fe‐Co‐Ni積層膜の交換磁気異方性と強磁性層結晶構造との相関

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タイトル別名
  • Correlation between Exchange Anisotropy and Crystal Structure of Ferromagnetic Layer in .GAMMA.-Mn-Ir/Fe-Co-Ni Bilayers
  • γ-Mn-Ir/Fe-Co-Ni積層膜の交換磁気異方性と強磁性層結晶構造との相関
  • g Mn Ir Fe Co Ni セキソウ マク ノ コウカン ジキ イホウセイ ト キョウジセイソウ ケッショウ コウゾウ ト ノ ソウカン
  • Correlation between Exchange Anisotropy and Crystal Structure of Ferromagnetic Layer in γ-Mn-Ir/Fe-Co-Ni Bilayers

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  The unidirectional anisotropy constant, JK, of γ-Mn-Ir / FM (FM = Fe-Co-Ni) bilayers was investigated by systematically changing the composition of the Fe-Co-Ni layers. The FM layers were grown in the crystal structures corresponding to their composition on the (111)-oriented face centered cubic (fcc) Mn-Ir layer. JK was significantly changed around the phase boundary of the FM layer between the body-centered cubic (bcc) phase and fcc-phase. The experimental results revealed a general feature where bcc-structured FM layers were more likely to induce stronger exchange anisotropy than fcc-structured FM layers. The JK values and the lattice mismatch between the Mn-Ir layer and the FM layer were increased with increasing Co concentration in the bcc-FM region. The dependence of JK on FM composition have been explained qualitatively with lattice distortion at the interface between the Mn-Ir and FM layers.

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