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SEM observations of domain configurations in thin‐film head pole structures

 

作者: Peter B. Mee,  

 

期刊: Journal of Applied Physics  (AIP Available online 1980)
卷期: Volume 51, issue 2  

页码: 861-866

 

ISSN:0021-8979

 

年代: 1980

 

DOI:10.1063/1.327659

 

出版商: AIP

 

数据来源: AIP

 

摘要:

An investigation was made of the domain configurations in uniaxial anisotropic permalloy pole structures for integrated thin‐film heads utilizing the SEM type‐II magnetic contrast mode. The technique was compared with other viable methods including Kerr magneto‐optics and the ferrofluid colloid. Type II was found to be superior for dynamic and high‐magnification studies. ac demagnetized, partially saturated, and remanent configurations were observed in poles of different geometries, after magnetization in both easy and hard directions. A comparison was made with the domain configuration in double‐layer permalloy structures. In the study of complete integrated heads, only the top pole domain configuration was observable using the ferrofluid colloid method, while with 200‐keV type II, the complete magnetic circuit domain structure was imaged. The effect of subsequent head processing on easy axis alignment was found to be minimal.

 

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