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US 2022/0278271 A1Published application
Magnetoresistance effect element
AssigneeTDK Corporation
InventorsShinto ICHIKAWA, Tsuyoshi SUZUKI, Katsuyuki NAKADA, Tomoyuki SASAKI
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Abstract
In the magnetoresistance effect element according to one aspect, the metal oxide constituting the metal oxide layer has the ratio of oxygen higher than the total ratio of metal when the composition is expressed in the stoichiometric composition; and the resistivity of the metal oxide layer is higher than that of the tunnel barrier layer.
Claims21
A magnetoresistance effect element comprising:
- a first ferromagnetic layer;
- a second ferromagnetic layer;
- a tunnel barrier layer disposed between the first and second ferromagnetic layers;
- and
- a metal oxide layer in contact with a surface of the second ferromagnetic layer opposite to a surface in contact with the tunnel barrier layer, wherein
- a ratio of oxygen is higher than a total ratio of metal elements in a composition formula expressed in a stoichiometric composition in a metal oxide constituting the metal oxide layer.
3 more elements
A magnetoresistance effect element comprising:
- a first ferromagnetic layer;
- a second ferromagnetic layer;
- a tunnel barrier layer disposed between the first and second ferromagnetic layers;
- and
- a metal oxide layer in contact with a surface of the second ferromagnetic layer opposite to a surface in contact with the tunnel barrier layer, wherein
- a ratio of oxygen is higher than a total ratio of metal elements in a composition formula expressed in a stoichiometric composition in a metal oxide constituting the metal oxide layer, and
- an oxygen deficiency ratio of the metal oxide layer is higher than an oxygen deficiency ratio of the tunnel barrier layer.
4 more elements
A magnetoresistance effect element comprising:
- a first ferromagnetic layer;
- a second ferromagnetic layer;
- a tunnel barrier layer disposed between the first and second ferromagnetic layers;
- and
- a metal oxide layer in contact with a surface of the second ferromagnetic layer opposite to a surface in contact with the tunnel barrier layer, wherein
- a ratio of oxygen is higher than a total ratio of metal elements in a composition formula expressed in a stoichiometric composition in a metal oxide constituting the metal oxide layer, and
- a barrier height of the metal oxide constituting the metal oxide layer is lower than a barrier height of an oxide constituting of the tunnel barrier layer.
4 more elements
(canceled)
Dependencies are inferred from the claim text.