Magnetic recording medium, magnetic recording device, and method of manufacturing magnetic recording medium

A magnetic recording medium, comprising:

• a substrate;
• an amorphous magnetic layer formed on said substrate, said amorphous magnetic layer serving as a recording layer;
• and
• a non-magnetic metal-element layer formed between said substrate and said amorphous magnetic layer,
• wherein an average surface roughness Ra of said non-magnetic metal-element layer is in a range of 0.7 nm to 2.0 nm, and, wherein:
• said non-magnetic metal-element layer is made of Al, and has a thickness in a range of 2.0 nm to 6.0 nm.

A magnetic recording medium, comprising:

• a substrate;
• an amorphous magnetic layer formed on said substrate, said amorphous magnetic layer serving as a recording layer;
• and
• a non-magnetic metal-element layer formed between said substrate and said amorphous magnetic layer,
• wherein an average surface roughness Ra of said non-magnetic metal-element layer is in a range of 0.7 nm to 2.0 nm, wherein:
• said recording layer is an amorphous magnetic layer which permits information to be recorded without being heat assisted;
• and
• said non-magnetic metal element layer is made of Al, and has a thickness in a range of 1.0 nm to 3.0 nm.

A magnetic recording device for magnetically recording information on a magnetic recording medium which includes a substrate, an amorphous magnetic layer formed on said substrate, said amorphous magnetic layer serving as a recording layer, and a non-magnetic metal-element layer formed between said substrate and said amorphous magnetic layer, wherein an average surface roughness Ra of said non-magnetic metal element layer is in a range of 0.7 nm to 2.0 nm,

• said magnetic recording device, comprising:
• magnetic field application means for applying a magnetic field onto said magnetic layer to determine a magnetization direction,
• wherein information is magnetically recorded onto said magnetic layer using said magnetic field application means, and
• wherein said non-magnetic metal-element layer is made of a material of at least one element selected from the group consisting of aluminum (Al), zinc (Zn), magnesium (Mg) and argentums (Ag).

A magnetic recording device for magnetically recording information on a magnetic recording medium which includes a substrate, an amorphous magnetic layer formed on said substrate, said amorphous magnetic layer serving as a recording layer, and a non-magnetic metal-element layer formed between said substrate and said amorphous magnetic layer, wherein an average surface roughness Ra of said non-magnetic metal-element layer is in a range of 0.7 nm to 2.0 nm,

• said magnetic recording device, comprising:
• heating means for locally heating said magnetic layer;
• and
• magnetic field application means for applying a magnetic field onto at least a portion of a heated area of said magnetic layer as heated by said heating means to determine a magnetization direction,
• wherein information is magnetically recorded onto said magnetic layer using said heating means and said magnetic field application means, and
• wherein said non-magnetic metal-element layer is made of a material of at least one element selected from the group consisting of aluminum (Al), zinc (Zn), magnesium (Mg) and argentums (Ag).

A magnetic recording device for magnetically recording information on a magnetic recording medium which includes a substrate, an amorphous magnetic layer formed on said substrate, said amorphous magnetic layer serving as a recording layer, and a non-magnetic metal-element layer formed between said substrate and said amorphous magnetic layer, wherein an average surface roughness Ra of said non-magnetic metal element layer is in a range of 0.7 nm to 2.0 nm,

• said magnetic recording device, comprising:
• an optical head for locally heating said magnetic layer;
• and
• a magnetic head for applying a magnetic field onto at least a portion of a heated area of said magnetic layer as heated by said heating head to determine a magnetization direction,
• wherein information is magnetically recorded onto said magnetic layer using said optical head and said magnetic head, and
• wherein said non-magnetic metal-element layer is made of a material of at least one element selected from the group consisting of aluminum (Al), zinc (Zn), magnesium (Mg) and argentums (Ag).

A magnetic recording device for magnetically recording information on a magnetic recording medium which includes a substrate, an amorphous magnetic layer formed on said substrate, said amorphous magnetic layer serving as a recording layer, and a non-magnetic metal-element layer formed between said substrate and said amorphous magnetic layer, wherein an average surface roughness Ra of said non-magnetic metal element layer is in a range of 0.7 nm to 2.0 nm,

• said magnetic recording device, comprising:
• magnetic field application means for applying a magnetic field onto said magnetic layer to determine a magnetization direction,
• wherein information is magnetically recorded onto said magnetic layer using said magnetic field application means, and
• wherein said non-magnetic metal-element layer is made of Al, and has a thickness in a range of 2.0 nm to 6.0 nm.

A magnetic recording device for magnetically recording information on a magnetic recording medium which includes a substrate, an amorphous magnetic layer formed on said substrate, said amorphous magnetic layer serving as a recording layer, and a non-magnetic metal-element layer formed between said substrate and said amorphous magnetic layer, wherein an average surface roughness Ra of said non-magnetic metal-element layer is in a range of 0.7 nm to 2.0 nm,

• said magnetic recording device, comprising:
• heating means for locally heating said magnetic layer;
• and
• magnetic field application means for applying a magnetic field onto at least a portion of a heated area of said magnetic layer as heated by said heating means to determine a magnetization direction,
• wherein information is magnetically recorded onto said magnetic layer using said heating means and said magnetic field application means, and
• wherein said non-magnetic metal-element layer is made of Al, and has a thickness in a range of 2.0 nm to 6.0 nm.

A magnetic recording device for magnetically recording information on a magnetic recording medium which includes a substrate, an amorphous magnetic layer formed on said substrate, said amorphous magnetic layer serving as a recording layer, and a non-magnetic metal-element layer formed between said substrate and said amorphous magnetic layer, wherein an average surface roughness Ra of said non-magnetic metal element layer is in a range of 0.7 nm to 2.0 nm,

• said magnetic recording device, comprising:
• an optical head for locally heating said magnetic layer;
• and
• a magnetic head for applying a magnetic field onto at least a portion of a heated area of said magnetic layer as heated by said heating head to determine a magnetization direction,
• wherein information is magnetically recorded onto said magnetic layer using said optical head and said magnetic head, and
• wherein said non-magnetic metal-element layer is made of Al, and has a thickness in a range of 2.0 nm to 6.0 nm.

A magnetic recording device for magnetically recording information on a magnetic recording medium which includes a substrate, an amorphous magnetic layer formed on said substrate, said amorphous magnetic layer serving as a recording layer, and a non-magnetic metal-element layer formed between said substrate and said amorphous magnetic layer, wherein an average surface roughness Ra of said non-magnetic metal element layer is in a range of 0.7 nm to 2.0 nm,

• said magnetic recording device, comprising:
• magnetic field application means for applying a magnetic field onto said magnetic layer to determine a magnetization direction,
• wherein information is magnetically recorded onto said magnetic layer using said magnetic field application means, and
• wherein said recording layer is an amorphous magnetic layer which permits information to be recorded without being heat assisted;
• and
• said non-magnetic metal element layer is made of Al, and has a thickness in a range of 1.0 nm to 3.0 nm.

A magnetic recording device for magnetically recording information on a magnetic recording medium which includes a substrate, an amorphous magnetic layer formed on said substrate, said amorphous magnetic layer serving as a recording layer, and a non-magnetic metal-element layer formed between said substrate and said amorphous magnetic layer, wherein an average surface roughness Ra of said non-magnetic metal-element layer is in a range of 0.7 nm to 2.0 nm,

• said magnetic recording device, comprising:
• heating means for locally heating said magnetic layer;
• and
• magnetic field application means for applying a magnetic field onto at least a portion of a heated area of said magnetic layer as heated by said heating means to determine a magnetization direction,
• wherein information is magnetically recorded onto said magnetic layer using said heating means and said magnetic field application means, and
• wherein said recording layer is an amorphous magnetic layer which permits information to be recorded without being heat assisted;
• and
• said non-magnetic metal element layer is made of Al, and has a thickness in a range of 1.0 nm to 3.0 nm.

A magnetic recording device for magnetically recording information on a magnetic recording medium which includes a substrate, an amorphous magnetic layer formed on said substrate, said amorphous magnetic layer serving as a recording layer, and a non-magnetic metal-element layer formed between said substrate and said amorphous magnetic layer, wherein an average surface roughness Ra of said non-magnetic metal element layer is in a range of 0.7 nm to 2.0 nm,

• said magnetic recording device, comprising:
• an optical head for locally heating said magnetic layer;
• and
• a magnetic head for applying a magnetic field onto at least a portion of a heated area of said magnetic layer as heated by said heating head to determine a magnetization direction,
• wherein information is magnetically recorded onto said magnetic layer using said optical head and said magnetic head, and
• wherein said recording layer is an amorphous magnetic layer which permits information to be recorded without being heat assisted;
• and
• said non-magnetic metal element layer is made of Al, and has a thickness in a range of 1.0 nm to 3.0 nm.