Perpendicular-current transport in exchange-biased spin-valves

We have measured giant magnetoresistance (GMR) with current perpendicular to the layer planes (CPP-MR) in exchange-biased (EB) spin-valves-a controllable spin-switch. We will present CPP data on EB-spin valves of Permalloy (Py) and Cu, and explain how the data are analyzed. Interpreted with the theo...

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Bibliographic Details
Published inIEEE transactions on magnetics Vol. 33; no. 5; pp. 3505 - 3510
Main Authors Pratt, W.P., Steenwyk, S.D., Hsu, S.Y., Chiang, W.-C., Schaefer, A.C., Loloee, R., Bass, J.
Format Journal Article
LanguageEnglish
Published IEEE 01.09.1997
Subjects
Astronomy
Electrons
Geometry
Giant magnetoresistance
Magnetic materials
Magnetic multilayers
Magnetic sensors
Physics
Saturation magnetization
Spin polarized transport
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Summary:We have measured giant magnetoresistance (GMR) with current perpendicular to the layer planes (CPP-MR) in exchange-biased (EB) spin-valves-a controllable spin-switch. We will present CPP data on EB-spin valves of Permalloy (Py) and Cu, and explain how the data are analyzed. Interpreted with the theory of Valet and Fert, the data yield an unexpectedly short value for the length over which electrons lose spin-memory in Py, the spin-diffusion length, l/sub sf//sup Py/=5.5/spl plusmn/1 nm. We will show that the CPP parameters derived with the aid of single EB-spin-valves predict rather well the CPP-MRs of double EB spin-valves.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0018-9464
1941-0069
DOI:10.1109/20.619480