Ferromagnetic resonance in cobalt-modified iron-oxide particulate tapes

被引：0

作者：

Kohmoto, O

机构：

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1997年 / 36卷 / 02期

关键词：

ferromagnetic resonance; shape anisotropy; saturation magnetization; magnetic recording; demagnetization factor; acicular particle; iron oxide; cobalt;

D O I：

10.1143/JJAP.36.698

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The magnetic anisotropy field (H-a) of Co-modified-Fe3O4 acicular particles in particulate tapes was studied using ferromagnetic resonance. The value of H-a of the particles has been determined to be 3.50 kOe, assuming a saturation magnetization (M) of 0.398 kG. Since the anisotropy field due to the acicular shape anisotropy is calculated to be 2.34 kOe for the particles with an axial ratio of 10, the contribution to H-a of the Co modification on the particle surface is estimated to be 1.16 kOe.

引用

页码：698 / 699

页数：2

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