발간논문

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Vol.28, No.12, 1033 ~ 1040, 1990
Title
Effects of Annealing on the Magnetic Properties of Co70Mn6Cr4B16Si4 Soft magnetic Amorphous Alloys
송진태Jin Tae Song, 이재석Jae Suk Lee, 박종완Jong Wan Park
Abstract
The effects of annealing on the magnetic properties were investigated for Co_(70)Mn_6Cr₄B_(16)Si₄ soft magnetic amorphous alloys which have high saturation mangetization, low coercive force and high permeability as well as possibility of nonmagnetic field annealing. In this study, amorphous alloys were annealed at Ar atmosphere tube furnace with various annealing methods. Coercive force and maximum permeability of these alloys were measured by DC and AC recording fluxmeter. Magnetic domain patterns of these alloys were observed by Bitter method. Magnetic properties were improved somewhat by nonmagnetic field annealing owing to structure and stress relaxation. Magnetic properties were remarkably improved by magnetic field annealing. This seems due to disappearance of maze domains and formation of new domains. For the overall improvement of the magnetic properties, existence of stable amorphous structure and longitudinal magnetic field annealing were preffered at DC and low frequency ranges, while microcrystalline modulation and transverse magentic field annealing at high frequencies
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