Sandwich films - Properties of a new soft magnetic material
Sandwich films - Properties of a new soft magnetic material
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DOI：
10.1038/35025142
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发表时间：
2000-09-14
期刊：
影响因子：
64.8
通讯作者：
Yabukami, S
中科院分区：
文献类型：
--
作者：
Wang, SX;Sun, NX;Yabukami, S
先进的电磁装置的发展受到缺乏具有适当高的饱和磁化强度（超过20千高斯）和大的磁导率滚降频率（大于1千兆赫兹）的软磁材料的限制。例如，磁性硬盘驱动器技术正在迅速接近感知的超顺磁性极限，在该极限下，存储的比特变得热不稳定-具有较高各向异性的磁盘更稳定，但由于磁性写入磁头变得饱和而无法使用。在这里，我们描述了一种新的软磁材料，其饱和磁化强度为24千高斯，在高达约1.2千兆赫兹的宽频率范围内具有1，000 - 1，400的大磁导率。这种新材料有望在磁记录头和集成电感器等器件中得到广泛应用。
The development of advanced electromagnetic devices has been constrained by a lack of soft magnetic materials with a suitably high saturation magnetization (over 20 kilogauss) and a large permeability roll-off frequency (greater than 1 gigaherz). For example, magnetic hard-disk-drive technology is rapidly approaching the perceived superparamagnetic limit at which the stored bits become thermally unstable — disks with higher anisotropy are more stable but are not usable because magnetic write heads become saturated. Here we describe a new soft magnetic material with a saturation magnetization of 24 kilogauss and a large permeability of 1,000–1,400 in a wide frequency range of up to about 1.2 gigaherz. This new material promises to have wide application in devices such as magnetic recording heads and integrated inductors.