Magnetic sensing element including laminated film composed of half-metal and NiFe alloy as free layer
US7466525B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2006 |
| Grant date | Dec 16, 2008 |
| Priority date | — |
| Expiry date | Jun 22, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N50/85
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
A magnetic sensing element exhibiting a large ΔRA is provided, in which a free magnetic layer has a small coercive force Hc and a small magnetostriction constant λs. The free magnetic layer includes a Co2MnZ alloy layer (where Z may represent at least one element selected from the group consisting of Al, Sn, In, Sb, Ga, Si, Ge, Pb, and Zn) and a (NiaFe100-a)bX100-b alloy layer (where X may represent at least one element selected from the group consisting of Cu, Au, Ag, Zn, Mn, Al, Cd, Zr, and Hf, a may represent a composition ratio satisfying 80<a≦100, and b may represent a composition ratio satisfying 60<b≦100). Consequently, the magnetostriction constant λs and the coercive force Hc of the free magnetic layer may be decreased and the soft magnetic properties of the free magnetic layer may be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.