| US 7,580,227 B2 | ||
| Magnetic element, magnetic information reproducing head, and magnetic information reproducing apparatus | ||
| Rie Sato, Kanagawa (Japan); and Koichi Mizushima, Kanagawa (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Jun. 25, 2004, as Appl. No. 10/875,273. | ||
| Claims priority of application No. 2003-184486 (JP), filed on Jun. 27, 2003; and application No. 2004-108059 (JP), filed on Mar. 31, 2004. | ||
| Prior Publication US 2005/0024788 A1, Feb. 03, 2005 | ||
| Int. Cl. G11B 5/39 (2006.01) | ||
| U.S. Cl. 360—313 | 15 Claims |
| 1. A magnetic element comprising:
a first magnetic material exhibiting thermal fluctuation of magnetization which depends on an external magnetic field and
which generates spin fluctuation in conduction electrons;
a nonmagnetic conductive material which is laminated on the first magnetic material and transfers the conduction electrons
having the spin fluctuation generated in the first magnetic material;
a second magnetic material which is laminated on the nonmagnetic conductive material and generates magnetic resonance upon
injection of the conduction electrons which have the spin fluctuation generated in the first magnetic material and are transferred
through the nonmagnetic conductive material, so that the intensity of the magnetic resonance changes in response to changes
in the thermal fluctuation of magnetization in the first magnetic material;
a first electrode electrically coupled with the first magnetic material;
a second electrode electrically coupled with the second magnetic material; and
a barrier layer involving a dielectic material is provided in at least one of the following locations: between the first magnetic
material and the nonmagnetic conductive material; between the nonmagnetic conductive material and the second magnetic material;
and between the second magnetic material and the second electrode.
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