Readback signal comparison between DSMR & SAL/MR heads

Author

Guo, Yimin ; Ju, Kochan

Author_Institution

Headway Technol. Inc., Milpitas, CA, USA

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

3437

Lastpage

3439

Abstract

In this work, we present a comparison study of read-back signals between DSMR and SAL/MR heads. Using the reciprocity principle and the boundary-element method, we studied read-back signals, including voltage amplitudes, spectra and roll-off curves. Results show, if we allow the same temperature rise above ambient, the peak voltage produced by the DSMR head is about 1.4 to 2.0 times as large as that by the SAL/MR head. The high signal amplitude is attributed to the absence of current shunting and more magnetic flux entering the DSMR head. Results also show that both DSMR and SAL/MR heads have exactly the same characteristic behavior in square-wave spectra within normal application regime, although the spectrum of a DSMR head has a gap null at a very high linear density

Keywords

boundary-elements methods; magnetic heads; magnetic multilayers; magnetoresistive devices; soft magnetic materials; DSMR head; SAL/MR head; boundary-element method; current shunting; linear density; magnetic flux; readback signal; reciprocity principle; roll-off curve; square-wave spectra; temperature rise; voltage amplitude; Harmonics suppression; Magnetic analysis; Magnetic flux; Magnetic heads; Magnetic noise; Magnetic recording; Magnetic shielding; Saturation magnetization; Temperature; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.538649

Filename

538649