Hard bias effect on magnetic noise in different types of tunnel magnetoresistive heads

G. C. Han, B. Y. Zong, P. Luo, L. Wang, Zaibing Guo, S. N. Mao

    Research output: Contribution to journalArticlepeer-review

    2 Scopus citations

    Abstract

    Hard bias effect on thermally activated magnetic noise has been investigated through changing the biasing direction in three types of tunnel magnetoresistive (TMR) heads with different head structures and sensor widths. It is found that characteristic variation in the noise spectra is different for different TMR heads. The results can be explained through stiffness field difference in different TMR heads. No additional ferromagnetic resonance (FMR) was observed in accompanying with the hard bias weakness. The resonant frequency as a function of field at different bias angles can be qualitatively accounted for by relevant stiffness field variations. 0

    Original languageEnglish (US)
    Pages (from-to)3597-3600
    Number of pages4
    JournalIEEE Transactions on Magnetics
    Volume44
    Issue number11 PART 2
    DOIs
    StatePublished - Nov 1 2008

    Keywords

    • FMR
    • Hard bias
    • Magnetic noise
    • TMR heads

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Electrical and Electronic Engineering

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