Patent ID: 6132567
Filing Date: 2000-10-17
Classification: C23C,G11B,H01F

Abstract:
A method of making amorphous light rare earth-transition metal-metalloid alloys by depositing a metalloid on a light rare earth-transition metal alloy using a sputtering method, the method comprising the step of:sputter depositing the metalloid by making the sign of a saturation magnetostriction constant be opposite to the sign of a residual stress by applying a different sputtering pressure according to the sign of the saturation magnetostriction constant of the alloy among the components of magneto elastic energy expressed by an expression ##EQU7## in order to increase effective perpendicular magneto anisotropy energy K.sub.Ueff expressed by the following Equation: ##EQU8## wherein K.sub.U denotes uniaxial magneto anisotropy energy, K.sub.MS denotes magneto static energy, ##EQU9## denotes the magneto elastic energy, .lambda..sub.s denotes a saturation magnetostriction constant, and .sigma. denotes a residual stress.