GMR of Co/Cu multilayers with reduced hysteresis and low-field response
- Lawrence Livermore National Lab., CA (United States)
The authors present the results of a systematic study on optimization of the giant magnetoresistance (GMR) response in Co/Cu multilayers (MLs) for Cu layer thickness near the second oscillatory peak. Co/Cu MLs with alternating thick (t{sub Co}{sup (1)}) and thin (t{sub Co}{sup (2)}) Co layers have been prepared in the form of [Cot{sub Co}{sup (1)}{angstrom}/Cu20{angstrom}/Cot{sub Co}{sup (2)}{angstrom}/Cu20{angstrom}]{sub 15}. They have found that the magnetoresistive hysteresis of these MLs is reduced with decreasing t{sub Co}{sup (2)} and has disappeared when t{sub Co}{sup (2)} < 4.5 {angstrom}. They have obtained an optimal GMR response with a field sensitivity of 0.13%/Oe over a field region of {approximately}60 Oe centered at {approximately}50 Oe. This architecture may enable the use of Cu/Co MLs in low-field magnetic sensor applications.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 566376
- Report Number(s):
- CONF-970468-; ISSN 0018-9464; TRN: IM9805%%100
- Journal Information:
- IEEE Transactions on Magnetics, Vol. 33, Issue 5Pt2; Conference: 1997 IEEE international magnetics conference (Intermag `97), New Orleans, LA (United States), 1-4 Apr 1997; Other Information: PBD: Sep 1997
- Country of Publication:
- United States
- Language:
- English
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