FERROMAGNETIC TUNNEL JUNCTION ELEMENT AND METHOD OF DRIVING FERROMAGNETIC TUNNEL JUNCTION ELEMENT
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United States of America Patent
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N/A
Issued Date -
N/A
app pub date -
Aug 28, 2008
filing date -
Mar 6, 2008
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
In a tunnel junction element having a ferromagnetic free layer, an insulating layer and a ferromagnetic fixed layer, in order to reduce the current necessary for spin-transfer magnetization reversal operation in the tunnel junction element, the ferromagnetic free layer comprises first and second ferromagnetic layers, a nonmagnetic metal layer is provided between these ferromagnetic layers, the nonmagnetic metal layer is such that magnetic coupling is preserved between the first and second ferromagnetic layers, also such that there is no influence on the crystal growth of the first and second ferromagnetic layers, the first ferromagnetic layer and the second ferromagnetic layer are placed such that the first ferromagnetic layer is in contact with the insulating layer, and the second ferromagnetic layer has a smaller magnetization than the first ferromagnetic layer.
First Claim
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