A one-dimensional micromagnetic model of the multilayer exchange-spring magnet is utilized for calculating the analytical expression of the differential susceptibility at the nucleation field in terms of structural parameters. The phase diagram in the plane of half-layer thicknesses is given for a Sm–Co/Fe multilayer, showing the critical line of χc→∞, which is the boundary for the irreversible demagnetization mode. For thin layers the optimum soft-phase volume fraction is deduced.
Reversal modes of the multilayer exchange-spring magnet / G., Asti; Solzi, Massimo; Ghidini, Massimo. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - 226-230:(2001), pp. 1464-1466. [10.1016/S0304-8853(00)01158-6]
Reversal modes of the multilayer exchange-spring magnet
SOLZI, Massimo;GHIDINI, Massimo
2001-01-01
Abstract
A one-dimensional micromagnetic model of the multilayer exchange-spring magnet is utilized for calculating the analytical expression of the differential susceptibility at the nucleation field in terms of structural parameters. The phase diagram in the plane of half-layer thicknesses is given for a Sm–Co/Fe multilayer, showing the critical line of χc→∞, which is the boundary for the irreversible demagnetization mode. For thin layers the optimum soft-phase volume fraction is deduced.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
