METHOD FOR TESTING LOCAL MECHANICS-MAGNETIC COUPLING COEFFICIENT OF MAGNETIC MATERIAL

摘要

A method for testing a local mechanics-magnetic coupling coefficient of a magnetic material. The square of a local mechanics-magnetic coupling coefficient kIT is defined as a ratio of magnetic energy stored in a magnetic material to an input reversible mechanical work, and the local mechanics-magnetic coupling coefficient of the material is expressed by measuring nanoindentation load-depth curves of the magnetic material in the cases of a saturated magnetic field and an unsaturated magnetic field. The method is simple to operate, and has advantages in local performance test of a composite material and other heterogeneous materials as well small-scale performance test of a nano-film material.