Soft magnetic properties and giant magneto-impedance effect of Fe73.5−xCrxSi13.5B9Nb3Au1 (x=1–5) alloys |
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| Authors: | Anh-Tuan Le Chong-Oh Kim Nguyen Chau Nguyen Duy Cuong Nguyen Duc Tho Nguyen Quang Hoa Heebok Lee |
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| Affiliation: | 1. Research Center for Advanced Magnetic Materials (ReCAMM), Chungnam National University, Taejon 305-764, Korea;2. Department of Materials Engineering, Chungnam National University, Taejon 305-764, Korea;3. Center for Materials Science, National University of Hanoi, 334 Nguyen Trai, Hanoi, Vietnam;4. Department of Physics Education, Kongju National University, Kongju 314-701, Korea |
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| Abstract: | In this paper, the effect of microstructural and surface morphological developments on the soft magnetic properties and giant magneto-impedance (GMI) effect of Fe73.5−xCrxSi13.5B9Nb3Au1 (x=1, 2, 3, 4, 5) alloys was investigated. It was found that the Cr addition causes slight decrease in the mean grain size of α-Fe(Si) grains. AFM results indicated a large variation of surface morphology of density and size of protrusions along the ribbon plane due to structural changes caused by thermal treatments with increasing Cr content. Ultrasoft magnetic properties such as the increase of magnetic permeability and the decrease of coercivity were observed in the samples annealed at 540 °C for 30 min. Accordingly, the GMI effect was also observed in the annealed samples. |
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| Keywords: | 75.50.Kj 75.50.Tt 75.75.+a |
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