Magneto-resistance effect film and memory using it
AssigneeCanon Kabushiki Kaisha
InventorTakashi Ikeda
Life of this patent
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Abstract
The magneto-resistance effect film of the present invention comprises a first magnetic layer consisting of a perpendicularly magnetized film; a second magnetic layer consisting of a perpendicularly magnetized film stacked above said first magnetic layer; a non-magnetic layer sandwiched between said first and second magnetic layers; and a first magnetic region formed in granular shape between one of said first and second magnetic layers and the non-magnetic layer and having a spin polarization greater than that of the one of the first and second magnetic layers, wherein said first magnetic region is exchange-coupled with the one of the first and second magnetic layers.
Claims17
A magneto-resistance effect film comprising:
- a first magnetic layer consisting of a perpendicularly magnetized film;
- a second magnetic layer consisting of a perpendicularly magnetized film stacked above said first magnetic layer;
- a non-magnetic layer sandwiched between said first and second magnetic layers;
- and
- a first magnetic region formed in granular shape between one of said first and second magnetic layers and the non-magnetic layer and having a spin polarization greater than that of the one of the first and second magnetic layers, wherein said first magnetic region is exchange-coupled with the one of the first and second magnetic layers.
A memory comprising:
- a memory element consisting of a magneto-resistance effect film;
- means for recording information in said memory element;
- and
- means for reading information recorded in said memory element,
- wherein said magneto-resistance effect film comprises,
- a first magnetic layer consisting of a perpendicularly magnetized film,
- a second magnetic layer consisting of a perpendicularly magnetized film stacked above said first magnetic layer,
- a non-magnetic layer sandwiched between said first and second magnetic layers, and
- a first magnetic region formed in granular shape between one of said first and second magnetic layers and the non-magnetic layer and having a spin polarization greater than that of the one of the first and second magnetic layers, wherein said first magnetic region is exchange-coupled with the one of the first and second magnetic layers.
Dependencies are inferred from the claim text.