1. The effects of annealing on the electrical resistivity, anisotropic magnetoresistivity and hysteresis loop were studied on sputtered permalloy thin films.

2. High precision instruments of measuring electrical resistivity and magnetoresistivity are needed to study the inner structure and resistance characteristic of nanocrystalline materials.

3. This paper introduces some magnetic parameters of magnetic material, such as magnetic hysteresis loop-line, electrical resistivity and magnetoresistivity, and the methods to measure them.