Abstract
Abstract Considerable magneto-resistance (MR) is found in Co 29 Ni 25 Mn 1 Cu 45 microwires. Magnetization curves, magnetic field dependence of MR and coercivity, H c , in as-prepared and annealed Co 29 Ni 25 Mn 1 Cu 45 microwires are quite different. Roughly monotonic decay of MR with magnetic field above 1000 Oe is observed in as-prepared microwires. Annealed sample exhibits a maximum and considerable hysteresis on magnetic field dependence of MR. The position of this maximum correlates well with the values of coercivity, H c , obtained from magnetization curves.
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