Process for preparing anisotropic rare earth magnet material
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United States of America Patent
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Jun 12, 1990
Issued Date -
N/A
app pub date -
Feb 17, 1989
filing date -
Jun 26, 1986
priority date (Note) -
Expired
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Abstract
An anisotropic rare earth magnet material is provided by a sputtering technique. The material has structural and magnetic anisotropy. Its composition is represented essentially by the following formula: (R.sub.1-a O.sub.a).sub.b M.sub.1-b wherein R means at least one of rare earth metal elements of Y and the lanthanide series of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu or a combination of Hf and at least one of the foregoing rare earth metal elements, M denotes Co or a combination of Co and at least one of Fe, Cu, Zr, Ti, Al and B, a is not greater than 0.05 (a.ltoreq.0.05), and b ranges from 0.1 to 0.5 (b=0.1-0.5).
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