摘要: A principal theme of this report is that the exchange‐stiffness parameter replaces magnetic anisotropy as core‐material (besides MS) governing sensitivity a read head when cross‐sectional dimensions core are less than 1 μm. cylindrical tube within would provide micromagnetic advantages. Under certain conditions unstable exchange energy stored in vortex interacts with stabilizing effect self‐demagnetization to amplify flux by drawing fringing from underlayer and shield. Reading characteristics which valid, standpoint, down storage‐cell areas small (40 nm)2 predicted. For sensitive reading, length must be near 100 (D/1 μm)2 μm, where D outer diameter tube.
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