Nonlinear behavior of magnetoresistive heads

Author

Amoldussen, T.C. ; Zhu, Jian-Gang

Author_Institution

IBM Corp., San Jose, CA, USA

Volume

34

Issue

1

fYear

1998

fDate

1/1/1998 12:00:00 AM

Firstpage

36

Lastpage

39

Abstract

Anisotropic magnetoresistive heads for magnetic recording are nonlinear transducers, unlike inductive read heads. The associated transfer characteristics are often represented by a 3rd order polynomial. Any nonlinearity in either the recording process or the read process can compromise detection schemes that rely on linear superposition for proper signal equalization. In this paper, the effects of nonlinear MR head transfer characteristics are studied in isolation from other effects by employing micromagnetic modeling of the head and read process. Effects of head saturation on equalization are illustrated

Keywords

magnetic anisotropy; magnetic heads; magnetoresistive devices; polynomials; anisotropic magnetoresistive head; detection; linear superposition; magnetic recording; micromagnetic model; nonlinear transducer; read process; saturation; signal equalization; third order polynomial; transfer characteristics; Frequency; Least squares approximation; Linear approximation; Magnetic heads; Magnetoresistance; Random sequences; Scattering; Signal analysis; Transfer functions; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.663434

Filename

663434