Magneto-optic compositionally modulated structure
AssigneeEastman Kodak Company
InventorsRandall H. Victora, Charles F. Brucker, Tukaram K. Hatwar
Life of this patent
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Abstract
A compositionally modulated magneto-optic structure includes a plurality of layers defining a layer stack, the overall layer stack including the elements Tb, Fe, and Pb; or the elements Tb, Co, and Pb; or the elements Tb, Fe, and Bi; or the elements Tb, Co and Bi.
Claims15
A compositionally modulated magneto-optic structure, comprising a plurality of layers defining a layer stack provided on the substrate, the overall layer stack including the elements Tb, Fe, and Pb;
- or the elements Tb, Co, and Pb;
- or the elements Tb, Fe, and Bi;
- or the elements Tb, Co and Bi wherein at least one layer consists of Tb, Pb, Bi, PbBi alloy, TbBi alloy, TbPb alloy or TbPbBi alloy.
A compositionally modulated magneto-optic structure, comprising at least a four layered repeating structure, such repeating structure respectively having layers including the following materials:
- Pb, Bi or Pb.sub.y Bi.sub.1-y ;
- Fe;
- Co;
- and Tb, wherein y varies in a range from 0 to 1.
A compositionally modulated magneto-optic structure, comprising at least a three layered repeating structure, such repeating structure respectively having layers consisting of the following materials Pb, Bi, or Pb.sub.y Bi.sub.1-y ;
- Fe.sub.x Co.sub.1-x ;
- and Tb, wherein x and y vary independently in a range from 0 to 1.
A compositionally modulated magneto-optic structure, comprising at least a two layered repeating structure, one such repeating layer structure including Fe.sub.x Co.sub.1-x and the other layer consisting of Tb.sub.z Pb.sub.y Bi.sub.1-y-z wherein x, y, and z vary independently subject to the restriction that 0.ltoreq.x.ltoreq.1, 0<z<1, and 0.ltoreq.y.ltoreq.1-z.
A magneto-optic storage device, comprising:
- a) a substrate;
- b) a first dielectric layer on the substrate;
- c) a plurality of layers defining a layer stack provided on the first dielectric layer, the overall layer stack including the elements Tb, Fe, and Pb;
- or the elements Tb, Co, and Pb;
- or the elements Tb, Fe, and Bi;
- or the elements Tb, Co and Bi wherein at least one layer consists of Tb, Pb, Bi, PbBi alloy, TbBi alloy, TbPb alloy or TbPbBi alloy;
- d) a second dielectric layer on the layer stack;
- and
- e) a reflector on the second dielectric layer.
Dependencies are inferred from the claim text.