| US 7,616,478 B2 | ||
| Magnetic storage device | ||
| Nikolai Franz Gregor Schwabe, Oxford (United Kingdom); Carsten Heide, Felde (Germany); and Roger James Elliott, Oxford (United Kingdom) | ||
| Assigned to Sony Corporation, Tokyo (Japan) | ||
| Filed on Mar. 27, 2007, as Appl. No. 11/692,160. | ||
| Application 11/692160 is a continuation of application No. 10/874205, filed on Jun. 24, 2004, granted, now 7,218,550. | ||
| Application 10/874205 is a continuation of application No. 10/364655, filed on Feb. 12, 2003, abandoned. | ||
| Application 10/364655 is a continuation of application No. 09/830412, abandoned, previously published as PCT/EP99/08368, filed on Nov. 02, 1999. | ||
| Claims priority of application No. 9823694.6 (GB), filed on Oct. 30, 1998. | ||
| Prior Publication US 2008/0007996 A1, Jan. 10, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G11C 11/15 (2006.01) | ||
| U.S. Cl. 365—173 [365/105; 365/158; 365/171] | 4 Claims |
| 1. A magnetic recording device, comprising at least one magnetic cell including:
a first magnetic layer having a fixed magnetization direction and configured to enable spin polarization of a writing current
of electrons;
a second magnetic layer having a variable magnetization direction oriented as a function of a direction of a spin polarized
writing current of electrons; and
an insulating or semiconducting layer that separates the first layer from the second layer,
wherein said variable magnetization direction is set to align with said fixed magnetization direction by directing an incident
writing current of electrons perpendicular through said first magnetic layer and then through said second magnetic layer,
and set to oppose said fixed magnetization direction by directing another incident writing current in an opposite direction
through said first and second magnetic layers, said writing currents having predetermined writing current densities.
|