Influence of spacer thickness reduction on bias level and peak asymmetry in SAL-biased MR heads

The peak asymmetry relates to the bias level of a magnetoresistive sensor. However, the peak asymmetry is affected not only by bias level but also by the shape of the transfer curve. Measured MR bias level and peak asymmetry are less sensitive to bias current variation when the spacer thickness betw...

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Bibliographic Details
Published inIEEE transactions on magnetics Vol. 31; no. 6; pp. 2630 - 2632
Main Authors Mitsumata, C., Kobayashi, T., Liao, S.H.
Format Journal Article Conference Proceeding
LanguageEnglish
Published New York, NY IEEE 01.11.1995
Institute of Electrical and Electronics Engineers
Subjects
Applied sciences
Coercive force
Current density
Demagnetization
Electronics
Exact sciences and technology
Magnetic devices
Magnetic field measurement
Magnetic heads
Magnetic thin film devices: magnetic heads (magnetoresistive, inductive, etc.); domain-motion devices, etc
Magnetization
Pulse measurements
Rough surfaces
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Surface roughness
Testing
Thin films
Magnetoresistive device
Thickness
Thin film device
Magnetization
Bias voltage
Recording head
Magnetic head
Sensors
Experimental study
Magnetic device
Magnetic recording
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Summary:The peak asymmetry relates to the bias level of a magnetoresistive sensor. However, the peak asymmetry is affected not only by bias level but also by the shape of the transfer curve. Measured MR bias level and peak asymmetry are less sensitive to bias current variation when the spacer thickness between MR and SAL is reduced. The numerical calculation shows that the magnetization distribution in the MR film becomes more uniform when a thinner spacer is used, indicating stronger magnetostatic coupling between layers. Calculated results of the peak asymmetry and the bias level versus bias current are in good agreement with the experimental data.
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ISSN:0018-9464
1941-0069
DOI:10.1109/20.490075