Off-axis pinned layer magnetic element utilizing spin...

Static information storage and retrieval – Systems using particular element – Magnetoresistive

Reexamination Certificate

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C365S145000, C365S171000

Reexamination Certificate

active

06888742

ABSTRACT:
A method and system for providing a magnetic element capable of being written in a reduced time using the spin-transfer effect while generating a high output signal and a magnetic memory using the magnetic element are disclosed. The magnetic element includes a ferromagnetic pinned layer, a nonmagnetic intermediate layer, and a ferromagnetic free layer. The pinned layer has a magnetization pinned in a first direction. The nonmagnetic intermediate layer resides between the pinned layer and the free layer. The free layer has a magnetization with an easy axis in a second direction. The first direction is in the same plane as the second direction and is oriented at an angle with respect to the second direction. This angle is different from zero and π radians. The magnetic element is also configured to allow the magnetization of the free layer to change direction due to spin transfer when a write current is passed through the magnetic element.

REFERENCES:
patent: 6396734 (2002-05-01), Ishikawa et al.
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Katine, J.A., et al., “Current-Driven Magnetization Reversal and Spin-Wave Excitations in Co/Cu/Co Pillars,” The American Physical Society, vol. 84, No. 14, Apr. 3, 2000, pp. 3149-3151.
Slonczewski, J.C., “Conductance and Exchange Coupling of Two Ferromagnets Separated by a Tunneling Barrier,” The American Physical Society, Physical Review B, Bol. 39, No. 10, Apr. 1, 1989, pp. 6995-7002.
Slonczewski, J.C., “Current-Driven Excitation of Magnetic Multilayers,” Journal of Magnetism and Magnetic Materials, 1996, pp. 1.1-1.7.
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