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Temperature dependence of the time decay of the magnetization in particulate media

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4 Author(s)
Oseroff, S.B. ; SDSU, San Diego and CMRR at UCSD, La Jolla ; Clark, D. ; Schultz, S. ; Shtrikman, S.

We have studied the temperature dependence of the time decay of the magnetization, dM/d lnt, in magnetic tapes as a function of reversal magnetic field, following an initial applied saturating field. We find the maximum decay rate occurs at the coercive field for all temperatures from 300 down to 6 K. Theoretical results and the available experimental data for studies in rock magnetism and ferromagnetic materials suggest the maximum magnetization decay should be proportional to the temperature. While we do find a linear temperature dependence, the data do not extrapolate to zero at T = 0 K, but surprisingly imply a finite value.

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Magnetics, IEEE Transactions on  (Volume:21 ,  Issue: 5 )