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High Frequency Permeability of Permalloy and its Composite Materials

1998; Volume: 22; Issue: S_1_ISFA_97 Linguagem: Inglês

10.3379/jmsjmag.22.s1_295

1880-4004

Teruhiro Kasagi, Takanori Tsutaoka, K. Hatakeyama,

Semiconductor materials and interfaces

Complex permeability (μ*=μ'-iμ")and electrical resistivity of permalloy and its composite materials(permalloy powder and Polyphenylene Sulfide resin) have been investigated in the frequency range from 100Hz to 2GHz at room temperature. In a bulk permalloy, a frequency dispersion takes place at about 300Hz; both μ' and μ" decrease with increasing frequency above this frequency. In permalloy composite materials, the low frequency permeability μ' decreases and the dispersion frequency increases with a decrease of permalloy content which can be seen in the ferrite composite materials. Low frequency electrical resistivity shows a drastic increase at about 40vol% with decreasing permalloy content. Below this content region, resonance type frequency dispersion appears in permeability spectra.