ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We report on magnetization time decay (MTD) data on several commercial and experimental tapes, γ-Fe2O3 (as a function of packing fraction), Co-doped γ-Fe2O3, and CrO2, measured from 2 to 400 K between 1 s and 104 s. We have found that the decay of the magnetization with time, for a given temperature, does not follow a simple log t relation. At each temperature we analyze our data with an empirical model,1 which relates values of coercive field, Hc, obtained with a 60-Hz B-H looper to that measured with a slow VSM field cycle (i.e., over ten orders of magnitude of time). Particular emphasis will be given to the nature of the MTD in these samples when extrapolated to zero temperature. These data will be compared to that previously reported,2 and the role of possible nonthermal mechanisms will be discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.340762
