Magnetic and noise properties of as-deposited and annealed soft underlayer
- 作者：Seong Yong Yoon ; Hoo San Lee ; Sok Hyun Kong ; Hoon Sang Oh
- 关键词：Noise properties ; Soft underlayer ; IrMn ; Magnetic filed annealing ; Complex or multidomain patterns
- 刊名：Journal of Magnetism and Magnetic Materials
- 出版年：2007
- 期刊代码：31_03048853
- 类别：ph
- 出版时间：April 2007
- 卷：311
- 期：2
- 页码：671-674
- 文件大小：696 K
摘要
We studied the magnetic and noise properties with various soft underlayer (SUL) types. For an as-deposited SUL, the results of spectrum, oscilloscope waveform and MFM indicated that the SUL types with IrMn pinning layer have more noise level than that of SUL types without IrMn pinning layer. And, after magnetic filed annealing along radial direction of disk, the exchange bias field increased and the noise level of type B (exchange bias type) decreased. These results reveal that incomplete or partial coupling may be generated at the interface between IrMn and ferromagnetic layer in as-deposited SUL. This incomplete coupling may result in complex or multidomain patterns in ferromagnetic layer.