Interlayer Thickness, Transition Parameter, and Intergranular Exchange in Perpendicular Oxide Media

The effect of intergranular exchange on the transition parameter (a) in perpendicular oxide composite media was investigated. Two different methods were used to vary the amount of intergranular exchange present in the films. The inter layer (IL) thickness was varied for one series of sample, while f...

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Bibliographic Details
Published inIEEE transactions on magnetics Vol. 42; no. 10; pp. 2333 - 2335
Main Authors Supper, N., Margulies, D.T., Olson, T., Ikeda, Y., Moser, A., Lengsfield, B., Berger, A.
Format Journal Article Conference Proceeding
LanguageEnglish
Published New York, NY IEEE 01.10.2006
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Cross-disciplinary physics: materials science; rheology
Density measurement
Deposition
Disk recording
Elementary particle exchange interactions
Exact sciences and technology
Filling
Hard disks
Intergranular exchange
interlayer (IL) thickness
Interlayers
Magnetic field measurement
Magnetic heads
Magnetic recording
Magnetism
Materials science
Mathematical models
Media
Other topics in materials science
Oxides
Perpendicular magnetic recording
perpendicular oxide media
Physics
Recording
Reduction
Saturation magnetization
transition parameter
Interfacial layer
Thickness
Proceedings
perpendicular oxide media
Intergranular exchange
interlayer (IL) thickness
transition parameter
Magnetic recording
Magnetic properties
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Summary:The effect of intergranular exchange on the transition parameter (a) in perpendicular oxide composite media was investigated. Two different methods were used to vary the amount of intergranular exchange present in the films. The inter layer (IL) thickness was varied for one series of sample, while for the other, the oxygen (O 2 ) flow was changed during deposition. The transition parameter was extracted using a read-back model to fit experimental rolloff curves for both series. The exchange was quantified by calculating alpha values from the experimental (M-H) loops. It was found that increasing the intergranular exchange in the recording layer lead to a reduction of the transition parameter by up to 12% for alpha values in the range of 2.2. These results were achieved for both methods of varying exchange and lead to very similar range of alpha values
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2006.879642