エピタキシャルYFeO_3反強磁性層を用いたスピンバルブ膜の方位依存性

概要

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Spin-valves using epitaxial orthoferrite (YFeO_3) as an antiferromagnetic layer were pepared on SrTiO_3(100) , (110) , and (111) substrates, and their properties were investigated. Each spin-valve showed a markedly different MR property according to the plane of the SrTiO_3 substrate. The highest MR ratio was observed in a spin-valve with a-axis-oriented epitaxial YFeO_3 on the SrTiO_3 substrate with a (110) plane, while a trace amount of MR was visible in a spin-valve with c-axis-oriented YFeO_3 on (100) SrTiO_3. The MR properties of the spin-valve on (110) SrTiO_3 exhibited strong angular dependence under an in-plane magnetic field. The exchange coupling in these spin-valves seems to have some relation with the direction of parasitic ferromagnetism in the antiferromagnetic epitaxial YFeO_3 layer.
社団法人日本磁気学会の論文
2000-04-15