TAILIEUCHUNG - Preparation of composite wire Fexni100 x Cu with Magnetoimpedance (Mi) effect

The coercively Hc of the composite wire FexNi100-x/Cu varied with composition and achieved the lowest value of Oe with the wire composition of Fe54Ni46/Cu. MI effect was strongly influenced by the wire composition and corresponded well with the change of coercively. the maximum values of MIrmax were 110% (f = Hz) and 23% (f = Hz) with the wire composition of Fe54Ni46/Cu. | Journal of Chemistry, Vol. 46 (4), P. 526 - 530, 2008 Preparation of composite wire FexNi100-x/Cu with Magnetoimpedance (MI) effect Part II - Relation between composition, structure, magnetic properties and MI effect Received 19 September 2007 Mai Thanh Tung1, Chu Van Thuan2 1 Faculty of Chemical Technology - Hanoi University of Technology 2 International Training Institute for Material Science (ITIMS) Summary Relation between composition and structure, magnetic properties and magnetoimpedance (MI) effect of electrodeposited composite wire FexNi1-x/Cu were investigated. Results showed that the increase of Fe content enhanced the bcc phase and decreased the grain size of the deposited alloy. The coercively Hc of the composite wire FexNi100-x/Cu varied with composition and achieved the lowest value of Oe with the wire composition of Fe54Ni46/Cu. MI effect was strongly influenced by the wire composition and corresponded well with the change of coercively. the maximum values of MIrmax were 110% (f = Hz) and 23% (f = Hz) with the wire composition of Fe54Ni46/Cu. I - INTRODUCTION In the first part of this paper, we have demonstrated that FexNi100-x/Cu composite wire prepared by electrodeposition technique could achieve MI ratio up to 120%. It was known that the MI effect, which appears as result of the magnetic transport in the surface layer of the wire, is closely related to the magnetic properties of the FexNi100-x layer [1, 2]. On the other hand, the magnetic properties of the electrodeposited FexNi100-x layer are strongly influenced by their composition and structure [3, 4]. Therefore, in order to control the MI effect of the FexNi100-x/Cu composite wire, it is useful to understand the relation between compositions, structure, magnetic properties of the materials. This paper will present results on the 426 influence of deposited layer composition on structure, magnetic properties and MI effect of the FexNi100-x/Cu composite wire. II - .

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