Non-local spin valve element with three terminals, hard disk head, and magnetic recording and reproducing apparatus

Patent metadata

Field	Value
Publication number	US-9117465-B2
Application number	US-201414338481-A
Country	US
Kind code	B2
Filing date	Jul 23, 2014
Priority date	Jul 26, 2013
Publication date	Aug 25, 2015
Grant date	Aug 25, 2015

Abstract

A spin valve element according to an embodiment includes: a nonmagnetic base layer; a first terminal including a first magnetic layer connecting to a portion near one of opposing end faces of the nonmagnetic base layer; a second terminal including a second magnetic layer disposed and connecting to the nonmagnetic base layer so as to be at a distance from the first terminal; a third terminal including a third magnetic layer disposed and connecting to the nonmagnetic base layer so as to be at distances from the first and second terminals, the second terminal and the third terminal connecting to a current source that passes a sense current, and the first terminal and one of the second terminal and the third terminal connecting to a voltage detection unit that detects a voltage.

First claim

The invention claimed is:

1. A spin valve element comprising:
a nonmagnetic base layer;
a first terminal including a first magnetic layer, in which a direction of magnetization is switchable, the first terminal connecting to a portion near one of opposing end faces of the nonmagnetic base layer in a direction along which the nonmagnetic base layer extends;
a second terminal including a second magnetic layer, in which a direction of magnetization is pinned, the second terminal…

Assignees

• Toshiba Kk

Inventors

• Kamiguchi Yuuzo
• Shirotori Satoshi
• Sugimura Shinobu
• Takagishi Masayuki
• Iwasaki Hitoshi

Classifications

• G11B5/3909 Primary

  Physics · mapped topic

• G01R33/093

  Physics · mapped topic

• G01R33/1284

  Physics · mapped topic

• H01F10/08

  Electricity · mapped topic

• G11B2005/3996

  Physics · mapped topic