Erasure of High Energy Magnetic Tapes |
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AC erasure curves ACD noise anisotropy field annealing Ba-Ferrite tape barium ferrite media bulk magnetic properties chromium dioxide demagnetizing field easy axis erase fields erasure characteristics erasure data erasure magnet Erasure-induced Figure frequency GPIO harmonics high coercivity tape high energy tape higher fields IEEE IEEE Trans increasing induced interparticle interactions longitudinal AC erasure longitudinal AC fields longitudinal fields Magn Magnetic Recording magnetocrystalline anisotropy magnetometer magnetostatic magnitude dB measured metal evaporated tape metal particle months msec negative interactions noise power Normalized F1 dB Normalized Field OUTPUT particle interactions perpendicular signal component plotted in Figs pre-annealed and pre-magnetized pre-magnetized samples PRINT pulse recording media remanence coercivity remanent magnetization remanent signal saturation saturation magnetization shown in Fig signal erasability signal level squareness ratio standard test signal SUBEND successive erasure switching field distributions tape media tape recorder temperatures torque unannealed 100 days vertical DC fields vertical fields