ELECTRICAL AND MAGNETIC-PROPERTIES OF NDFEB FILMS

The electrical resistivity rho and magnetization M of both bulk and th in film NdFeB samples have been investigated. For film type samples, t he slope of the electrical resistivity dR/dT below room temperature is decreasing with decreasing thickness of the films. The temperature at which the electrical resistivity increases abruptly for non-magnetic films varies from 580 K for 1000 Angstrom to above 860 K for 10000 Ang strom: and for magnetic films varies from 620 K for 1000 Angstrom to a bove 900 K for 10000 Angstrom. These phenomena can be explained by the observed shear modulus between films and substrates. The magnetic ani sotropy is larger in the film type samples than in the bulk samples. T he highest anisotropy of the films in this investigation corresponds t o an intrinsic coercivity of 5 kOe.