Preparation of Co–Fe–P amorphous fine needles with anodization technique and measurement of demagnetizing factor
Preparation of Co–Fe–P amorphous fine needles with anodization technique and measurement of demagnetizing factor
复制标题
阳极氧化技术制备Co-Fe-P非晶细针及退磁系数测定
DOI：
10.1063/1.362138
复制
发表时间：
1996
影响因子：
3.2
通讯作者：
J. Yamasaki
中科院分区：
文献类型：
--
作者：
A. Tayaoka;E. Tayaoka;J. Yamasaki
采用直流电沉积阳极氧化技术成功制备了直径0.1 ~ 0.2 μm长径比大于100的非晶Co - fe - p和结晶Co细针，并测量了它们的退磁系数。研究发现，带针薄膜的退磁系数随长径比的增大而减小，在0.07 ~ 0.08左右趋于低恒定值。为了利用针的形状各向异性获得低的退磁系数，估计需要大于100的纵横比。对于直径为0.1 μm的Co-Fe-P非晶针，以达到饱和所需的磁场与平均磁通密度之比定义的等效退磁因子约为0.6。
The amorphous Co–Fe–P and crystalline Co fine needles with diameter 0.1–0.2 μm aspect ratio more than 100 were prepared successfully by applying the dc electrodeposition to the anodization technique and their demagnetizing factors were measured. It was found that the demagnetizing factor of film with needles decreases with increasing aspect ratio and tends to take low constant values around 0.07–0.08. To obtain the low demagnetizing factor by using the shape anisotropy of needle, it was estimated that the aspect ratio more than 100 is needed. The equivalent demagnetizing factor defined by a ratio of a field needed to achieve saturation to the averaged flux density is estimated around 0.6 for the film with Co–Fe–P amorphous needles with 0.1 μm diameter.