Magnetic force microscopy study of perpendicular media: Signal-to-noise determination and transition noise analysis

Erik B. Svedberg, Sakhrat Khizroev, Dmitri Litvinov

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Signal-to-noise ratio (SNR) from a limited bit sequence has been extracted from magnetic force microscopy (MFM) images by two different methods and compared. The autocorrelation SNR properties extracted from the MFM image data are in better agreement with spinstand data than "normal" Fourier extracted SNR values. Transition noise data were also extracted and analyzed, "Squeezing" of the noise was measured as the periodicity of the recorded bit pattern became smaller than 250 nm and subsequently a relaxation at ∼200 nm occurred. MFM analysis based SNR data for two media types (CoCrPtTa alloy and CoB/Pd multilayer based) are compared. Ni 45Fe 55 alloy was used for the soft underlayer material.

Original languageEnglish (US)
Pages (from-to)5365-5370
Number of pages6
JournalJournal of Applied Physics
Volume91
Issue number8
DOIs
StatePublished - Apr 15 2002
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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