Title :
Correlations of magnetic microstructure and anisotropy with noise spectra for CoNi and CoCrTa thin film media
Author :
Khan, Mahbub R. ; Lee, S.Y. ; Pressesky, J.L. ; Williams, D. ; Duan, S.L. ; Fisher, R.D. ; Heiman, Neil ; Scheinfein, M.R. ; Unguris, J. ; Pierce, D.T. ; Celotta, R.J. ; Speliotis, Dennis E.
Author_Institution :
Seagate Magnetics, Fremont, CA, USA
fDate :
9/1/1990 12:00:00 AM
Abstract :
The authors report on two thin-film-media alloys, Co86Cr12Ta2 and Co75Ni25, which have very different noise characteristics. The magnetic microstructure of these films was observed with SEMPA (scanning electron microscopy with polarization analysis). Anisotropy and rotational hysteresis loss measurements have been made using a torque magnetometer. The distribution of anisotropy field H k and its width dHk have also been measured along with its different normalized values. It is suggested that the observed magnetic microstructure can be directly correlated with measured readback noise and anisotropy differences
Keywords :
chromium alloys; cobalt alloys; ferromagnetic properties of substances; magnetic anisotropy; magnetic hysteresis; magnetic structure; magnetic thin films; metallic thin films; nickel alloys; noise; scanning electron microscope examination of materials; tantalum alloys; Co75Ni25; Co86Cr12Ta2; anisotropy; magnetic microstructure; noise spectra; readback noise; rotational hysteresis loss; scanning electron microscopy with polarization analysis; Anisotropic magnetoresistance; Chromium alloys; Cobalt alloys; Electrons; Magnetic field measurement; Magnetic films; Magnetic force microscopy; Magnetic noise; Micromagnetics; Nickel alloys;
Journal_Title :
Magnetics, IEEE Transactions on
