Method For Making Data Storage Media
A method for making a data storage media that includes providing a substrate, depositing on the substrate a first layer that includes a magnetic material and a non-magnetic material, heating the first layer, depositing on the first layer a second layer that includes the magnetic material and the non-magnetic material, and heating the second layer and the first layer. A data storage media constructed in accordance with the method of the invention is also provided.
1 . A method for making a data storage media, comprising:
providing a substrate;
depositing on the substrate a first layer that includes a magnetic material and a non-magnetic material;
heating the first layer;
depositing on the first layer a second layer that includes the magnetic material and the non-magnetic material; and
heating the second layer and the first layer.
2 . The method of claim 1 , including the magnetic material comprising at least one of FePt, CoPt, FePd, CoPd, NiPt, or AlMn.
3 . The method of claim 1 , including the non-magnetic material comprising at least one of MgO, C, SiO 2 , TiO 2 , Ta 2 O 5 , Al 2 O 3 , BN, SiN x , B 4 C.
4 . The method of claim 1 , including depositing the first layer to have a thickness in the range of about 0.2 nm to about 5.0 nm.
5 . The method of claim 1 , including depositing the second layer to have a thickness in the range of about 0.2 nm to about 5.0 nm.
6 . The method of claim 1 , including heating the first layer to a temperature in the range of about 350° C. to about 750° C..
7 . The method of claim 1 , including heating the first layer for a time in the range of about 1.0 seconds to about 60.0 seconds.
8 . The method of claim 1 , including heating the second layer and the first layer to a temperature in the range of about 350° C. to about 750° C..
9 . The method of claim 1 , including heating the second layer and the first layer for a time in the range of about 1.0 seconds to about 60.0 seconds.
10 . The method of claim 1 , including depositing the first layer and the second layer from a composite target containing the magnetic material and the non-magnetic material.
11 . The method of claim 1 , including depositing the first layer and the second layer by co-depositing from a first target containing the magnetic material and a second target containing the non-magnetic material.
12 . The method of claim 1 , including depositing the first layer and the second layer by depositing a magnetic layer from a first target containing the magnetic material and depositing on the magnetic layer a non-magnetic layer from a second target containing the non-magnetic material.
13 . The method of claim 1 , including structuring the first layer and the second layer to form a magnetic recording layer.
14 . The method of claim 13 , including grains of the magnetic material in the magnetic recording layer having a size in the range of about 2.0 nm to about 20.0 nm.
15 . The method of claim 13 , including the magnetic recording layer having a magnetic anisotropy in the range of about 1×10 7 erg/cc to about 10×10 7 erg/cc.
16 . The method of claim 1 , further including:
depositing on the first layer and the second layer an additional layer that includes the magnetic material and the non-magnetic material; and
heating the additional layer and the second layer and the first layer.
17 . The method of claim 16 , including structuring the first layer and the second layer and the additional layer to form a magnetic recording layer.
18 . The method of claim 17 , including grains of the magnetic material in the magnetic recording layer having a size in the range of about 2.0 nm to about 20.0 nm.
19 . The method of claim 17 , including the magnetic recording layer having a magnetic anisotropy in the range of about 1×10 7 erg/cc to about 10×10 7 erg/cc.
20 . A data storage media constructed in accordance with the method of claim 1 .