公开(公告)号：US20040229084A1

公开(公告)日：2004-11-18

申请号：US10764813

申请日：2004-01-26

Applicant: Fuji Electric Device Technology Co., Ltd.

Inventor： Tadaaki Oikawa ,  Takahiro Shimizu ,  Hiroyuki Uwazumi ,  Naoki Takizawa

IPC: G11B005/66

CPC classification number: G11B5/7325 ,  G11B5/65 ,  G11B5/656 ,  G11B5/8404

Abstract: A nonmagnetic foundation layer is made to have a body-centered cubic crystal structure with a preferred crystal orientation plane being the bcc (110) plane. A nonmagnetic intermediate layer, provided between the foundation layer and a granular magnetic layer, 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 is made to be not more than 10% for each of an a-axis and a c-axis. As a result, epitaxial growth of ferromagnetic crystals in the granular magnetic layer, 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. Depositing the layers on an unheated substrate yields reduces manufacturing costs.

Abstract translation: 将非磁性基底层制成具有体心立方晶体结构，优选的晶体取向平面是bcc（110）面。 设置在基础层和粒状磁性层之间的非磁性中间层具有hcp（100）面或hcp（200）面为优选取向面的六方密堆积结构。 此外，非磁性中间层3和粒状磁性层之间的晶格失配量对于a轴和c轴分别为10％以下。 结果，促进了具有hcp结构的粒状磁性层中的铁磁晶体的外延生长，因此磁性层的结晶度增加，因此可以同时实现矫顽力的提高和还原 在噪音 将层沉积在未加热的基底上会降低制造成本。