Conetic (Ni77Fe14Cu5Mo4) and conetic co-sputtered with aluminum thin films are prepared and their soft magnetic properties are examined in order to investigate their eligibility for application in the free layer of spin valve-based magnetic sensors. As the aluminum concentration increases, the coercivity and anisotropy field of the film is reduced by more than 60%, which indicates that the soft magnetism is significantly improved. The thermal treatment further enhances the soft magnetic properties. This improvement can be attributed to the enhanced random anisotropy that results from the reduction in the grain size, which is caused by the incorporation of the aluminum into the conetic. These encouraging results imply that the conetic co-sputtered with Al is sufficiently magnetically soft to be applied in spin valve-based sensors.
Bibliographical noteFunding Information:
This research was supported by the Basic Science Research Program (2012-009406), the Pioneer Research Center Program (2012-0001087) funded by the Ministry of Education, Science and Technology in Korea, and the Agency for Defense Development (ADD) of the Republic of Korea.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry