スピンフィルタースピンバルブヘッドの数値解析

抄録

Spin-filter spin-valve (SFSV) is one of the key technologies for achieving high amplitude and controlling amplitude asymmetry at higher areal densities. In SFSV, the free layer is located between the Cu layer and the additional high- conductivity layer (back layer). This back layer improves the current distribution even in a thin free layer and keeps the MR ratio. It also decreases the magnetic field in the free layer from the bias current, and reduces the asymmetry sensitivity of the bias current and stripe height.
In this paper, we describe a simulator that we developed by using micromagnetics and the Boltzmann equation, and discuss the design optimization of SFSV.