Recording performance and magnetization switching of CoTb/CoCrPt composite perpendicular media
Recording performance and magnetization switching of CoTb/CoCrPt composite perpendicular media
复制标题
DOI：
10.1063/1.1452273
复制
发表时间：
2002-05
影响因子：
3.2
通讯作者：
H. Uwazumi;T. Shimatsu;Y. Sakai;K. Enomoto;S. Takenoiri;S. Watanabe;H. Muraoka;Y. Nakamura
中科院分区：
文献类型：
--
作者：
H. Uwazumi;T. Shimatsu;Y. Sakai;K. Enomoto;S. Takenoiri;S. Watanabe;H. Muraoka;Y. Nakamura
讨论了CoTb非晶/CoCrPT颗粒复合介质的磁性能、记录性能和热稳定性。添加CoCrPtB的复合介质在低记录密度下的热稳定性随着CoTb厚度的增加而显著提高，与环方形度的增加相一致，当CoTb厚度大于6 nm时，介质的信号几乎没有衰减。此外，当CoTb厚度增加到6 nm时，信噪比也随之提高。在本实验条件下，CoTb(6 Nm)/CoCrPtB(20 Nm)介质具有最好的信噪比性能，且没有热衰减。含钴铬铂复合介质的介质噪声从CoTb300kfci开始呈超线性增加，这是由于记录比特的渗流引起的，可能是由于CoTb层中的强交换耦合引起的。添加CoCrPtB的介质噪声小于添加CoCrPtB的介质噪声，这种介质噪声的超线性增长始于∼400kfci，高于添加CoCrPtB的介质的噪声。
Magnetic properties, recording performance, and thermal stability of CoTb amorphous/CoCrPt granular composite media are discussed. Thermal stability at low recording density of the composite media with CoCrPtB improves significantly as CoTb thickness increases, in accord with the increase of loop squareness, Mr/Ms. The media having CoTb thickness of more than 6 nm show almost no signal decay. Moreover, the signal-to-medium-noise ratio, SNR, improves with increasing CoTb thickness up to 6 nm. CoTb(6 nm)/CoCrPtB(20 nm) medium shows the best SNR performance under the present experimental conditions with no thermal decay. Media noise of the composite media with CoCrPt increases super linearly from ∼300 kfci, which is caused by the percolation of the recorded bits, probably due to the strong exchange coupling in the CoTb layer. The media with CoCrPtB shows less media noise than that with CoCrPt, and the super-linear increase of this media noise starts at ∼400 kfci which is higher than that of the media with Co...