Abstract
The relation between the anisotropic magnetoresistivity ratio Δρ/ρ0 and ordinary Hall coefficient R0 and extraordinary Hall coefficient Rs were studied for Ni-Fe binary alloy and (Ni89.5Fe10.5)M (M =Co, Cu, Nb, Gd, Al, Si and Bi) ternary alloy thin films, to obtain a guiding principle of searching the new materials that show a large value of Δρ/ρ0. The value of Δρ/ρ0 increases with increases in the absolute value of R0 and also shows a maximum (Δρ/ρ0≅4%) at Rs= 0. In the case of the ferromagnetic metals, the large value of Δρ/ρ0 is obtainable under the following conditions, (1) sign of R0 is negative and the absolute value of R0 is large (carrier is electron like and effective carrier density neff is small) and (2) Rs is zero
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