| 摘要 |
A nonmagnetic foundation layer 2 is made to have a body-centered cubic crystal structure with a preferred crystal orientation plane being the bcc (110) plane, and between the foundation layer 2 and a granular magnetic layer 4 is provided a nonmagnetic intermediate layer 3 that has a hexagonal close- packed structure with the hcp (100) plane or the hcp (200) plane being the preferred orientation plane. Furthermore, the crystal lattice misfit amount between the nonmagnetic intermediate layer 3 and the granular magnetic layer 4 is made to be not more than 10% for each of an axis and a c-axis. As a result, epitaxial growth of ferromagnetic crystals in the granular magnetic layer 4, which has an hcp structure, is promoted, and hence the crystallinity of the magnetic layer is increased, and thus it becomes possible to simultaneously realize an increase in coercivity and a reduction in noise. Selected Drawing
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