TY - JOUR
T1 - Temperature Dependence of Coercivity at Recording Frequencies
T2 - Barium Ferrite versus Oxide
AU - Meichle, Linda S.
AU - Victora, Randall H.
PY - 1992/11
Y1 - 1992/11
N2 - We demonstrate that materials with comparable thermal dependence of coercivity under normal laboratory measurement conditions, differing only in sign, have quite different properties at recording frequencies. Barium ferrites, with positive dHc/dT, have augmented thermal dependence, while oxides, with negative dHc/dT, exhibit weaker thermal dependence at recording frequencies. Experimental data and theoretical analysis confirm this behavior. Two methods of predicting coercivity as a function of temperature, for recording time scales, are presented. The implications for direct overwrite performance while thermally cycling are discussed.
AB - We demonstrate that materials with comparable thermal dependence of coercivity under normal laboratory measurement conditions, differing only in sign, have quite different properties at recording frequencies. Barium ferrites, with positive dHc/dT, have augmented thermal dependence, while oxides, with negative dHc/dT, exhibit weaker thermal dependence at recording frequencies. Experimental data and theoretical analysis confirm this behavior. Two methods of predicting coercivity as a function of temperature, for recording time scales, are presented. The implications for direct overwrite performance while thermally cycling are discussed.
UR - http://www.scopus.com/inward/record.url?scp=0026945404&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0026945404&partnerID=8YFLogxK
U2 - 10.1109/20.179816
DO - 10.1109/20.179816
M3 - Article
AN - SCOPUS:0026945404
SN - 0018-9464
VL - 28
SP - 3393
EP - 3397
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 6
ER -