| 摘要 |
<p>PROBLEM TO BE SOLVED: To lower a critical current density for maintaining high frequency magnetic field and starting oscillation of an oscillation layer.SOLUTION: A magnetic head of an embodiment includes a spin torque oscillator arranged between a main magnetic pole and an auxiliary magnetic pole. The spin torque oscillator includes a down-spin injection layer, a first intermediate layer, an oscillation layer, a second intermediate layer, and an up-spin injection layer. The down-spin injection layer includes a first perpendicular magnetization film and a first interface magnetic layer, which are formed on one of the main magnetic pole and the auxiliary magnetic pole. The first interface magnetic layer used in a first embodiment includes: one element being at least one of Fe, Co, and Ni; and at least one element selected from a group consisting of Cr, V, Mn, Ti, and Se. The up-spin injection layer includes a second perpendicular magnetization film.</p> |
