GMR in DC magnetron sputtered Ni{sub 81}Fe{sub 19}/Cu multilayers
- Lawrence Livermore National Lab., CA (United States)
In this paper, the authors present results of a study on Ni{sub 81}Fe{sub 19}/Cu magnetic multilayers (MLs) deposited using a four-source DC magnetron sputtering system operated in planetary mode. A significant change of GMR value with deposition conditions, especially base pressure and deposition pressure, has been observed for Ni{sub 81}Fe{sub 19}/Cu MLs. With an optimized process, they have obtained a GMR response of 9.5% with a field sensitivity of 0.44%/Oe for Si/ [(Ni{sub 81}Fe{sub 19})17{angstrom}/Cu20{angstrom}]{sub 20} MLs without an Fe buffer layer. The insertion of a very thin layer of a second magnetic species at nonmagnetic/magnetic interfaces in the ML stack makes GMR response either sensitive or less sensitive to deposition conditions depending on the species selected. They believe that the key to obtaining large GMR values in Ni{sub 81}Fe{sub 19}/Cu MLs lies in the control of layered structure and interfacial chemistry. In addition, these Ni{sub 81}Fe{sub 19}/Cu MLs survive high temperature annealing up to 250 C, retaining a GMR value of 8.5%.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 649509
- Report Number(s):
- CONF-980102-; ISSN 0018-9464; TRN: 98:010423
- Journal Information:
- IEEE Transactions on Magnetics, Vol. 34, Issue 4Pt1; Conference: 7. joint MMM-intermag conference, San Francisco, CA (United States), 6-9 Jan 1998; Other Information: PBD: Jul 1998
- Country of Publication:
- United States
- Language:
- English
Similar Records
Evolution of the GMR-effect amplitude in copper/Permalloy-multilayered thin films[Giant Magnetoresistance]
High yield Cu-Co CPP GMR multilayer sensors