Multilayered structure film and method of making the same

A multilayered structure film comprising:

• a non-magnetic polycrystalline underlayer;
• a first non-magnetic polycrystalline intermediate layer including crystal grains adjacent to each other on a surface of the non-magnetic polycrystalline underlayer;
• a second non-magnetic polycrystalline intermediate layer containing at least one element contained in the first non-magnetic polycrystalline intermediate layer, said second non-magnetic polycrystalline intermediate layer extending over a surface of the first non-magnetic polycrystalline intermediate layer by a thickness larger than thickness of the first non-magnetic polycrystalline intermediate layer, the second non-magnetic polycrystalline intermediate layer including crystal grains individually having grown from the crystal grains of the first non-magnetic polycrystalline intermediate layer;
• a lower magnetic polycrystalline layer including crystal grains adjacent to each other on a surface of the second non-magnetic polycrystalline intermediate layer, said lower magnetic polycrystalline layer containing at least one non-magnetic element contained in the second non-magnetic polycrystalline intermediate layer;
• a first non-magnetic polycrystalline layer including crystal grains adjacent to each other on a surface of the lower magnetic polycrystalline layer;
• a second non-magnetic polycrystalline layer containing at least one element contained in the first non-magnetic polycrystalline layer, said second non-magnetic polycrystalline layer extending over a surface of the first non-magnetic polycrystalline layer by a thickness larger than thickness of the first non-magnetic polycrystalline layer, the second non-magnetic polycrystalline layer including crystal grains individually having grown from the crystal grains of the first non-magnetic polycrystalline layer;
• and
• an upper magnetic polycrystalline layer including crystal grains adjacent to each other on a surface of the second non-magnetic polycrystalline layer, said upper magnetic polycrystalline layer containing at least one non-magnetic element contained in the second non-magnetic polycrystalline layer.

A method of making a multilayered structure film, comprising:

• depositing a first group of atoms on a surface of an object;
• subjecting the first group of atoms to heat treatment so as to form a first non-magnetic polycrystalline layer;
• depositing a second group of atoms on a surface of the first non-magnetic polycrystalline layer so as to form a second non-magnetic polycrystalline layer having a thickness larger than thickness of the first non-magnetic polycrystalline layer, said second group of atoms including atoms of at least one element contained in the first non-magnetic polycrystalline layer;
• depositing a third group of atoms on a surface of the second non-magnetic polycrystalline layer so as to form a magnetic polycrystalline layer, said third group of atoms including atoms of at least one non-magnetic element contained in the second non-magnetic polycrystalline layer;
• and
• subjecting at least the second non-magnetic polycrystalline layer and the magnetic polycrystalline layer to heat treatment.

A method of making a multilayered structure film, comprising:

• depositing a first group of atoms on a surface of an object;
• subjecting the first group of atoms to heat treatment so as to form a first non-magnetic polycrystalline layer;
• depositing a second group of atoms on a surface of the first non-magnetic polycrystalline layer so as to form a second non-magnetic polycrystalline layer having a thickness larger than thickness of the first non-magnetic polycrystalline layer, said second group of atoms including atoms of at least one element contained in the first non-magnetic polycrystalline layer;
• depositing a third group of atoms on a surface of the second non-magnetic polycrystalline layer so as to form a first magnetic polycrystalline layer, said third group of atoms including atoms of at least one non-magnetic element contained in the second non-magnetic polycrystalline layer;
• depositing a fourth group of atoms on a surface of the first magnetic polycrystalline layer;
• subjecting the fourth group of atoms to heat treatment so as to form a third non-magnetic polycrystalline layer;
• depositing a fifth group of atoms on a surface of the third non-magnetic polycrystalline layer so as to form a fourth non-magnetic polycrystalline layer having a thickness larger than thickness of the third non-magnetic polycrystalline layer, said fifth group of atoms including atoms of at least one element contained in the third non-magnetic polycrystalline layer;
• depositing a sixth group of atoms on a surface of the fourth non-magnetic polycrystalline layer so as to form a second magnetic polycrystalline layer, said sixth group of atoms including atoms of at least one non-magnetic element contained in the fourth non-magnetic polycrystalline layer;
• and
• subjecting at least the fourth non-magnetic polycrystalline layer and the second magnetic polycrystalline layer to heat treatment.