Title:
磁気抵抗効果素子およびその製造方法
Document Type and Number:
Japanese Patent JP4538342
Kind Code:
B2
Abstract:
A current-perpendicular-to-plane (CPP) giant magnetoresistive (GMR) sensor of the synthetic spin valve type and its method of formation are disclosed, the sensor including a novel laminated free layer having ultra-thin (less than 3 angstroms thickness) laminas of Fe50 Co50 (or any iron rich alloy of the form CoxFe1-x with x between 0.25 and 0.75) interspersed with thicker layers of Co90Fe10 and Cu spacer layers to produce a free layer with good coercivity, a coefficient of magnetostriction that can be varied between positive and negative values and a high GMR ratio, due to enhancement of the bulk scattering coefficient by the laminas. The configuration of the lamina and layers in periodic groupings allow the coefficient of magnetostriction to be finely adjusted and the coercivity and GMR ratio to be optimized. The sensor performance can be further improved by including layers of Cu and Fe50Co50 in the synthetic antiferromagnetic pinned layer.
Inventors:
Zhang Ryo
Lee Min
Rashid Subia
Yeon-hwan
Liu Yue
Lee Min
Rashid Subia
Yeon-hwan
Liu Yue
Application Number:
JP2005049638A
Publication Date:
September 08, 2010
Filing Date:
February 24, 2005
Export Citation:
Assignee:
Headway Technologies, Inc.
International Classes:
G11B5/39; H01L43/08; G11B5/127; H01F10/16; H01F10/32
Domestic Patent References:
| JP2003060263A | ||||
| JP2002150512A | ||||
| JP2003208706A | ||||
| JP2001076323A |
Attorney, Agent or Firm:
Yasushi Santanzaki
Yoichiro Fujishima
Yoichiro Fujishima