Exchange Anisotropy in PtMn/Ni80 Fe20 (110) Quad-Crystal Films

Chin Chung Yu, Jung Chun Andrew Huang, Yeong Der Yao

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Exchange anisotropy for an ordered tetragonal PtMn/Ni80Fe 20 (110) quad-crystal film grown on an Mo(001) step surface was studied. The PtMn/Ni80Fe20 bilayers grown at 300 °C show a unidirectional exchange anisotropy with the easy axis parallel to the underlying Mo step-edge direction. The azimuthal distribution of the coercive fields displays a fourfold symmetry. The azimuthal distribution of the coercive fields can be explained by the fourfold crystalline-induced interfacial strain between Ni80Fe20 and Mo. The azimuthal distribution of the exchange fields was mainly attributed to the step-induced unidirectional anisotropy and the biquadratic coupling between antiferromagnetic-ferromagnetic interface.

Original languageEnglish
Pages (from-to)2741-2743
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number5 II
Publication statusPublished - 2003 Sep

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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