Temperature derivative of the resistance of spin valves

Spin-dependent transport properties of nanowires containing individual Co/Cu/Co pseudo-spin valves were investigated by monitoring an AC voltage induced by a temperature oscillation under a continuous DC current. We observed sharp peaks in the field-dependent AC voltage response. These peaks only appear close to the magnetic field range where conventional magnetoresistance shows a reversible and gradual transition. The effect is interpreted as an extra dissipation process with a distinct temperature dependence that occurs in non-collinear magnetic configurations when transverse moment relaxation takes place.


Published in:
Journal of Magnetism and Magnetic Materials, 322, 9-12, 1464-1466
Year:
2010
Publisher:
Elsevier
ISSN:
0304-8853
Keywords:
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 Record created 2010-04-30, last modified 2018-03-17

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