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Magnetic Viscosity of Sr-Na-Zn W-Type Hexagonal Ferrite Magnets
Journal de Physique IV : Proceedings
The temperature dependence of the magnetic viscosity coefficient (Sv), the activation volume (v), and the anisotropy field (HA) were examinedfor Sr-Na-Zn W-type hexagonal ferrite magnet from 77 to 623 K. Samples with different coercive forces (HcJ) were prepared, and the dependence of Sv and v on Hcj was studied at 300 K. The results show that the temperature dependence of Sv is the same as that ofHcj. The value of v is inversely proportional to HA. The logarithm of Sv is proportional to Indoi:10.1051/jp4:19971125 fatcat:l7bfu7y3ozfr5pizggypdwz6ui