MAGNETORESISTIVE ELEMENT BASED ON MAGNETIC DOMAIN WALL SHIFT BY PULSE CURRENT AND HIGH-SPEED MAGNETIC RECORDING DEVICE

Title:

MAGNETORESISTIVE ELEMENT BASED ON MAGNETIC DOMAIN WALL SHIFT BY PULSE CURRENT AND HIGH-SPEED MAGNETIC RECORDING DEVICE

Document Type and Number:

WIPO Patent Application WO/2006/090656

Kind Code:

A1

Abstract:

It is possible to realize a magnetoresistive element and a solid state memory capable of performing high-speed magnetization inversion and having a low critical current density. The magnetoresistive element includes a first magnetization fixed layer, a magnetization free layer, and a second magnetization fixed layer. The first magnetization fixed layer is substantially antiparallel to the second magnetization fixed layer. Both transition regions between the first magnetization fixed layer and the magnetization free layer or between the second magnetization fixed layer and the magnetization free layer can trap the magnetic domain wall and the magnetic domain wall exists in one of them. A pulse current of a DC current of pulse width 1 ns with current density not exceeding 10⁶ A/cm² is supplied between the first and the second magnetization fixed layer.

Inventors:

ICHIMURA MASAHIKO (JP)
TAKAHASHI HIROMASA (JP)
TATARA GEN (JP)

Application Number:

PCT/JP2006/302924

Publication Date:

August 31, 2006

Filing Date:

February 20, 2006

Export Citation:

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Assignee:

UNIV OSAKA (JP)
ICHIMURA MASAHIKO (JP)
TAKAHASHI HIROMASA (JP)
TATARA GEN (JP)

International Classes:

H01L43/08; G11C11/15; H01L27/105; H01L29/82

Domestic Patent References:

WO2005069368A1

2005-07-28

Foreign References:

JP2006005308A	2006-01-05
JP2005191032A	2005-07-14
JP2006073930A	2006-03-16

Other References:

GROLLIER J. ET AL.: "Switching a spin valve back and forth by current-induced domain wall motion", APPLIED PHYSICS LETTERS, vol. 83, no. 3, 21 July 2003 (2003-07-21), pages 509 - 511, XP001178014
YAMAGUCHI A. ET AL.: "Real-Space Observation of Current-Driven Domain Wall Motion in Submicron Magnetic Wires", PHYSICAL REVIEW LETTERS, vol. 92, no. 7, 20 February 2004 (2004-02-20), pages 077205-1 - 077205-4, XP002988240

Attorney, Agent or Firm:

Ogawa, Katsuo (3-3 Shinkawa 1-chome, Chuo-k, Tokyo 33, JP)

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