Magneto-optical recording medium

Claim 1

A magneto-optical recording medium comprising a transparent substrate, a magnetic oxide layer formed on said substrate, and band-shaped reflection layers in the same plane formed on said magnetic oxide layer, wherein said magnetic oxide layer comprises: a magnetoplumbite-type ferrite having general formula (I): MeO.n(M.sub.x Fe.sub.(2-x) O.sub.3) (I) wherein Me represents at least one element selected from the group consisting of Ba, Pb, Sr and La; M represents one element or a combination of at least two elements which constitute a three-valence element or element group as a whole; x, 0<x≦2; and n, 5≦n≦6, a garnet-type magnetic oxide having general formula (II): (R.sub.3)(M.sup.3+.sub.y Fe.sup.3+.sub.5-y)O.sub.12 (II) wherein R represents at least one element selected from the group consisting of Y, Bi, Pb, Ca, Sr, Ba, La, Sm, Eu, Gd, Er, Tm, Yb, Lu, Pr, Nd, Ho and Dy; M represents at least one element selected from the group consisting of Ga, Al, V, Si, Ge, Co, Zn, Lu, Sc, Cr, Zr, Ti, Tb, Gd and Dy, by which Fe can be replaced; y, 0≦y≦3; or a cobalt spinel-type magnetic oxide having general formula (III): Co.sub.x M.sub.y Fe.sub.2-(x+y) O.sub.4 (III) wherein M represents at least one element selected from the group consisting of Al, Cr, Mn, Ni, Ti, Zn, Sn, Cu, Mg, Rh, V, Ga, Sb, Sc, Bi, Y, Su, Eu, Tb, Er, Yb, Ho, Dy, Tm, Gd, Sm, Pb, Re and Ru, by which Fe can be replaced; and x, y, 0<x+y<3, 0≦y≦=2; and wherein said band-shaped reflection layer has a reflectance of 30% or 80%, and a heat conductivity of less than 0.25 cal/cm.sec.°C. at 20° C.