Fabrication method of amorphous light rare earth-transition meta

Details Fabrication method of amorphous light rare earth-transition meta Fabrication method of amorphous light rare earth-transition meta

1999-01-06

2000-10-17

Nguyen, Nam

Chemistry: electrical and wave energy

Processes and products

Coating, forming or etching by sputtering

20419215, 20419223, C23C 1400

Patent

active

061325678

ABSTRACT:
A method of making amorphous light rare-earth transition metal (LRE-TM)-metalloid alloys having perpendicular magneto anisotropy energy, is provided. In this method of making amorphous LRE-TM-metalloid alloys by depositing a metalloid on an LRE-TM by sputtering, the sign of a saturation magnetostriction constant of the alloy is made opposite to the sign of a stress by applying a different Ar sputtering pressure according to the sign of the saturation magnetostriction constant, in order to increase the effective perpendicular magneto anisotropy energy K.sub.Ueff containing the components of magneto elastic energy expressed by an expression ##EQU1## (here, .lambda..sub.s is the saturation magnetostriction constant, and .sigma. is the stress).

REFERENCES:
patent: 4889607 (1989-12-01), Buschow
patent: 4925742 (1990-05-01), Sugawara et al.

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