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Transport Measurements of Magnetic Multilayers at Reduced Lateral Dimensions

Published online by Cambridge University Press:  15 February 2011

Y.D. Park ,
H.D. Hudspeth ,
T.J. Schultz ,
A. Cabbibo ,
J. A. Caballero ,
F. Sharifi  and
J.R. Childress
Y.D. Park
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611–2066
H.D. Hudspeth
Affiliation:
Department of Physics, University of Florida, Gainesville, FL 32611–8440
T.J. Schultz
Affiliation:
Department of Physics, University of Florida, Gainesville, FL 32611–8440
A. Cabbibo
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611–2066
J. A. Caballero
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611–2066
F. Sharifi
Affiliation:
Department of Physics, University of Florida, Gainesville, FL 32611–8440
J.R. Childress
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611–2066
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Abstract We report on the fabrication and transport properties of magnetic multilayers with widths down to 100 nm. We employ e-beam processed nano-deposition masks to pattern magnetic multilayers which define nano-wires by lift-off or by a removal process such as ion-milling. Two different magnetic multilayer systems (antiferromagnetically coupled Co/Cu multilayers and NiFe/Cu/Co spin-valves) are investigated. Structures resulting from the lift-off process show high contact resistance and high resistivities while ion-milled structures show resistivities close to that of bulk. For Fe(50Å)/[Co(15Å)/Cu(20Å)]x20 /Cu(30Å), patterned nano-wire structures display no negative magnetoresistance but a positive magnetoresistance that is linear with applied field and no apparent hysteresis. For Ta(50Å)/NiFe(50Å)/Cu(35Å)/Co(20Å)/Cu(30Å), we found the resistance to decrease as the absolute value of magnetic field is decreased and found hysteresis to be present.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 475: Symposium M – Magnetic Ultrathin Films, Multilayers, and Surfaces – 1997 , 1997 , 303
Copyright
Copyright © Materials Research Society 1997

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References

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