磁気抵抗効果の形状効果

抄録

Magnetoresistance was studied for circular and width-varied rectangular Ni-Co-Fe ternary alloy thin films. Resistivity was measured using fourpoint prove. Applying the method of images, the true value of ρ_av can be obtained on every film. But that of Δρ cannot, because the angle between the current direction and magnetization direction is not uniform in the film. The behavior of ρ_av and Δρ can be understood exactly by the finite element method, allowing the magnetoresistance of variously shaped films to be analyzed by it.