Magnetic alloy

Abstract

Abstract PURPOSE:To provide a magnetic alloy which has low magnetorestriction and is suitable for a magnetic recording medium having an excellent noise characteristic by specifying the compsn. of a Dy-Fe-Co alloy contg. Gd, Tb, Ho. Er, etc. CONSTITUTION:A magnetic alloy consists of 0.2<= a <=0.7, 0.02<= b <=0.8, 1.0<= z <=4.0 in (Fe1-aCoa)ZDy1-bRb (where R; >= combination of >=1 kind among Gd, Tb, Ho and Er) has low magnetorestriction and has excellent uniaxial magnetic anisotropy and coercive force characteristic. Magnetic recording to a high density is made possible by forming said alloy in the form of a thin film. The alloy is preferably amorphous as the grain boundary is liable to be a cause for nonuniform properties and leads to a decreased noise characteristic if the alloy is polycrystalline. The above-mentioned alloy of the amorphous thin film is obtainable by melting and cooling the alloy having the prescribed comps. in a vacuum or inert gaseous or reducing gaseous atmosphere to form an ingot., cutting the resulting ingot to a suitable size to make a target and sputtering the alloy on a glass base plate by using such target.

Inventors

• 👤 Masashi Sato
• 👤 佐藤　政司
• 👤 Tetsuhiko Mizoguchi
• 👤 徹彦 溝口
• 👤 Koichiro Inomata
• 👤 浩一郎 猪俣

Bibliographic Details