Magneto resistive element with laminate component and magnetic memory
A magneto resistive element includes a laminate that includes a first ferromagnetic layer, a second ferromagnetic layer, and a non-magnetic layer located between the first ferromagnetic layer and the second ferromagnetic layer; a first conductive layer that is connected to a first surface of the laminate in a lamination direction; and a second conductive layer that is connected to a second surface opposite the first surface. The first surface of the laminate includes a first region which comes into contact with the first conductive layer and a second region which does not come into contact with the first conductive layer.
1 . A magneto resistive element comprising:
a laminate that includes a first ferromagnetic layer, a second ferromagnetic layer, and a non-magnetic layer located between the first ferromagnetic layer and the second ferromagnetic layer;
a first conductive layer that is connected to a first surface of the laminate in a lamination direction; and
a second conductive layer that is connected to a second surface opposite the first surface,
wherein the first surface of the laminate includes a first region which directly connects to and directly contacts the first conductive layer, and a second region which does not come into direct contact with the first conductive layer,
wherein when viewed in the lamination direction, a geometrical center of the laminate and a geometrical center of the first conductive layer are misaligned with each other,
the lamination direction is perpendicular to a plane in which each layer of the laminate extends, and
a writing current is configured to flow in the lamination direction within the laminate, between the first conductive layer and the second conductive layer.
2 . The magneto resistive element according to claim 1 wherein a circumferential length of the first conductive layer is shorter than a circumferential length of the first surface of the laminate.
3 . The magneto resistive element according to claim 1 wherein in a cross section which passes through the geometrical center of the first conductive layer and the geometrical center of the laminate viewed in the lamination direction and is cut in the lamination direction, a width of the first conductive layer is shorter than a width of the laminate.
4 . A magneto resistive element comprising:
a laminate that includes a first ferromagnetic layer, a second ferromagnetic layer, and a non-magnetic layer located between the first ferromagnetic layer and the second ferromagnetic layer;
a first conductive layer that is connected to a first surface of the laminate in a lamination direction; and
a second conductive layer that is connected to a second surface opposite the first surface,
wherein the first surface of the laminate includes a first region which comes into contact with the first conductive layer and a second region which does not come into contact with the first conductive layer,
wherein when viewed in the lamination direction, a geometrical center of the laminate and a geometrical center of the first conductive layer are misaligned with each other,
the lamination direction is perpendicular to a plane in which each layer of the laminate is spread, and
wherein the second surface of the laminate includes a third region which comes into contact with the second conductive layer and a fourth region which does not come into contact with the second conductive layer.
5 . A magneto resistive element comprising:
a laminate that includes a first ferromagnetic layer, a second ferromagnetic layer, and a non-magnetic layer located between the first ferromagnetic layer and the second ferromagnetic layer;
a first conductive layer that is connected to a first surface of the laminate in a lamination direction; and
a second conductive layer that is connected to a second surface opposite the first surface,
wherein the first surface of the laminate includes a first region which comes into contact with the first conductive layer and a second region which does not come into contact with the first conductive layer,
wherein when viewed in the lamination direction, a geometrical center of the laminate and a geometrical center of the first conductive layer are misaligned with each other,
the lamination direction is perpendicular to a plane in which each layer of the laminate is spread, and
wherein when viewed in the lamination direction, the geometrical center of the laminate and a geometrical center of the second conductive layer are misaligned with each other.
6 . The magneto resistive element according to claim 1
wherein when viewed in the lamination direction, the geometrical center of the first conductive layer and a geometrical center of the second conductive layer are misaligned with each other.
7 . The magneto resistive element according to claim 1 wherein the first conductive layer and the second conductive layer have parts overlapping each other when viewed in the lamination direction.
8 . The magneto resistive element according to claim 1 wherein the first conductive layer comes into contact with a portion of a side wall of the laminate.
9 . The magneto resistive element according to claim 1 wherein the second conductive layer comes into contact with a portion of a side wall of the laminate.
10 . The magneto resistive element according to claim 1 wherein in a cross section which passes through the geometrical center of the first conductive layer and the geometrical center of the laminate viewed in the lamination direction and is cut in the lamination direction, a side surface of the first conductive layer and a side surface of the laminate are continuously formed.
11 . The magneto resistive element according to claim 1
wherein the first conductive layer includes a first columnar portion and a second columnar portion,
wherein the first columnar portion comes into contact with the laminate,
wherein the second columnar portion comes into contact with the first columnar portion, and
wherein a circumferential length of the first columnar portion becomes longer moving away from the laminate.
12 . The magneto resistive element according to claim 11 ,
wherein the circumferential length of the second columnar portion becomes shorter moving away from the laminate.
13 . A magnetic memory comprising:
a plurality of magneto resistive elements according to claim 1 .