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Title:
SELF-PINNED SPIN VALVE MAGNETORESISTANCE EFFECT FILM AND MAGNETIC SENSOR USING THE SAME, AND ROTATION ANGLE DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/029684
Kind Code:
A1
Abstract:
Provided are a self-pinned spin valve magnetoresistance effect film, a magnetic sensor using the same, and a rotation angle detection device. The self-pinned spin valve magnetoresistance effect film has a strong coupling magnetic field in a pinned layer, a small reduction in the change in resistance, and superior resistance to magnetic fields without reducing the coercive force in a first strong magnetized layer, which is a pinned layer in the film, even when exposed to a strong external magnetic field. By inserting a non-magnetic layer between a ground layer and a pinned layer to form the spin valve magnetoresistance effect film, the self-pinned spin valve magnetoresistance effect film having superior resistance to magnetic fields, a magnetic sensor using the same, and a rotation angle detection device are obtained.

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Inventors:
ONO TOMOKI (JP)
ABE YASUNORI (JP)
SHIRASAKI FUMIO (JP)
Application Number:
PCT/JP2009/003833
Publication Date:
March 18, 2010
Filing Date:
August 10, 2009
Export Citation:
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Assignee:
HITACHI METALS LTD (JP)
ONO TOMOKI (JP)
ABE YASUNORI (JP)
SHIRASAKI FUMIO (JP)
International Classes:
H01L43/08; G01D5/245
Foreign References:
JP2006005282A2006-01-05
JP2006208255A2006-08-10
JPH09184703A1997-07-15
JP2003086865A2003-03-20
JP2002204002A2002-07-19
JPH10321930A1998-12-04
JP2005044489A2005-02-17
JP2812042B21998-10-15
JPH0340750B21991-06-19
JPH0333934B21991-05-20
JP2002519873A2002-07-02
Other References:
J. L. LEAL: "Spin valves exchange biased by Co/Ru/Co synthetic antiferromagnets", JOURNAL OF APPLIED PHYSICS, vol. 83, no. 7, 1998, pages 3720, XP000870605, DOI: doi:10.1063/1.366597
See also references of EP 2323189A4
Attorney, Agent or Firm:
TAKEI, Nobutoshi et al. (JP)
Nobutoshi Takei (JP)
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