MAGNETIC MEMORY ELEMENT AND NONVOLATILE MEMORY DEVICE
First Claim
1. A magnetic memory element comprising:
- a stacked body including;
a first stacked unit including;
a first ferromagnetic layer, a magnetization of the first ferromagnetic layer being fixed in a first direction;
a second ferromagnetic layer, a direction of a magnetization of the second ferromagnetic layer being variable in a second direction; and
a first nonmagnetic layer provided between the first ferromagnetic layer and the second ferromagnetic layer, the first nonmagnetic layer, the first ferromagnetic layer and the second ferromagnetic layer being stacked in a stacking direction; and
a second stacked unit including a third ferromagnetic layer stacked with the first stacked unit in the stacking direction, a direction of a magnetization of the third ferromagnetic layer being variable in a third direction; and
a conductive shield opposed to at least a part of a side surface of the second stacked unit, an electric potential of the conductive shield being controllable.
1 Assignment
0 Petitions
Accused Products
Abstract
According to one embodiment, a magnetic memory element includes a stacked body and a conductive shield. The stacked body includes first and second stacked units. The first stacked unit includes first and second ferromagnetic layers and a first nonmagnetic layer. The first ferromagnetic layer has a fixed magnetization in a first direction. A magnetization direction of the second ferromagnetic layer is variable in a second direction. The first nonmagnetic layer is provided between the first and second ferromagnetic layers. The second stacked unit includes a third ferromagnetic layer stacked with the first stacked unit in a stacking direction of the first stacked unit. A magnetization direction of the third ferromagnetic layer is variable in a third direction. The conductive shield is opposed to at least a part of a side surface of the second stacked unit. An electric potential of the conductive shield is controllable.
32 Citations
20 Claims
-
1. A magnetic memory element comprising:
-
a stacked body including; a first stacked unit including; a first ferromagnetic layer, a magnetization of the first ferromagnetic layer being fixed in a first direction; a second ferromagnetic layer, a direction of a magnetization of the second ferromagnetic layer being variable in a second direction; and a first nonmagnetic layer provided between the first ferromagnetic layer and the second ferromagnetic layer, the first nonmagnetic layer, the first ferromagnetic layer and the second ferromagnetic layer being stacked in a stacking direction; and a second stacked unit including a third ferromagnetic layer stacked with the first stacked unit in the stacking direction, a direction of a magnetization of the third ferromagnetic layer being variable in a third direction; and a conductive shield opposed to at least a part of a side surface of the second stacked unit, an electric potential of the conductive shield being controllable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. A nonvolatile memory device comprising a plurality of magnetic memory elements,
each of the magnetic memory elements including: -
a stacked body including; a first stacked unit including; a first ferromagnetic layer, a magnetization of the first ferromagnetic layer being fixed in a first direction; a second ferromagnetic layer, a direction of a magnetization of the second ferromagnetic layer being variable in a second direction; and a first nonmagnetic layer provided between the first ferromagnetic layer and the second ferromagnetic layer, the first nonmagnetic layer, the first ferromagnetic layer and the second ferromagnetic layer being stacked in a stacking direction; and a second stacked unit including a third magnetic layer stacked with the first stacked unit in the stacking direction, a direction of a magnetization of the third magnetic layer being variable in a third direction; and a conductive shield opposed to at least a part of side surface of the second stacked unit, an electric potential of the conductive shield being controllable, the shield being disposed between the magnetic memory elements.
-
Specification