MAGNETIC RANDOM ACCESS MEMORY CELL WITH IMPROVED DISPERSION OF THE SWITCHING FIELD
First Claim
1. A magnetic random access memory (MRAM) cell comprisinga tunnel magnetic junction comprising a first ferromagnetic layer, a second ferromagnetic layer having a second magnetization that can be oriented relative to an anisotropy axis of the second ferromagnetic layer at a predetermined high temperature threshold, and a tunnel barrier between the first and second ferromagnetic layer;
- a first current line extending along a first direction and in communication with the magnetic tunnel junction;
the first current line being configured to provide an magnetic field for orienting the second magnetization when carrying a field current;
the MRAM cell being configured with respect to the first current line such that when providing the magnetic field, at least a component of the magnetic field is substantially perpendicular to said anisotropy axis;
the second ferromagnetic layer having an asymmetrical shape along at least one of its dimension such that the second magnetization comprises a C-state pattern, andsaid C-state pattern being changeable into a S-state pattern by the second field component and the second magnetization being switchable by the first field component, when the magnetic field is provided.
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Accused Products
Abstract
The present disclosure concerns a magnetic random access memory MRAM cell comprising a tunnel magnetic junction formed from a first ferromagnetic layer, a second ferromagnetic layer having a second magnetization that can be oriented relative to an anisotropy axis of the second ferromagnetic layer at a predetermined high temperature threshold, and a tunnel barrier; a first current line extending along a first direction and in communication with the magnetic tunnel junction; the first current line being configured to provide an magnetic field for orienting the second magnetization when carrying a field current; wherein the MRAM cell is configured with respect to the first current line such that when providing the magnetic field, at least a component of the magnetic field is substantially perpendicular to said anisotropy axis. The MRAM cell has an improved switching efficiency, lower power consumption and improved dispersion of the switching field compared to conventional MRAM cells.
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Citations
12 Claims
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1. A magnetic random access memory (MRAM) cell comprising
a tunnel magnetic junction comprising a first ferromagnetic layer, a second ferromagnetic layer having a second magnetization that can be oriented relative to an anisotropy axis of the second ferromagnetic layer at a predetermined high temperature threshold, and a tunnel barrier between the first and second ferromagnetic layer; -
a first current line extending along a first direction and in communication with the magnetic tunnel junction;
the first current line being configured to provide an magnetic field for orienting the second magnetization when carrying a field current;the MRAM cell being configured with respect to the first current line such that when providing the magnetic field, at least a component of the magnetic field is substantially perpendicular to said anisotropy axis; the second ferromagnetic layer having an asymmetrical shape along at least one of its dimension such that the second magnetization comprises a C-state pattern, and said C-state pattern being changeable into a S-state pattern by the second field component and the second magnetization being switchable by the first field component, when the magnetic field is provided. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification