| Issue |
Europhys. Lett.
Volume 42, Number 2, April II 1998
|
|
|---|---|---|
| Page(s) | 185 - 190 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1998-00228-6 | |
| Published online | 01 September 2002 | |
Thermoelectric effects in mesoscopic AuFe spin-glass wires
1
Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke
Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
2
Department of Physics and Astronomy, Northwestern University
2145 Sheridan Road, Evanston, Illinois 60208, USA
3
Institute for Physics, University of Basel,
Klingelbergstrasse 82, CH-4056 Basel, Switzerland
4
Instituut voor Kern- en Stralingsfysica, Katholieke Universiteit Leuven
Celestijnenlaan 200D, B-3001 Leuven, Belgium
Received:
31
July
1997
Accepted:
11
March
1998
Recently we reported on the differential resistance 
of
narrow AuFe spin-glass wires (Phys. Rev. Let., 77 (1996) 2276).
Surprisingly, R(I) was found to be asymmetric in I for the smallest samples. In
this letter we present differential resistance measurements performed on a AuFe wire
with a multiprobe geometry. The new experiments reveal that the asymmetric behavior
of R(I) can be explained in terms of a mesoscopic thermoelectric effect. Our
experiments also indicate that the thermopower S of a AuFe spin-glass alloy becomes
size dependent for length scales below a few hundred nanometers.
PACS: 72.15.Jf – Thermoelectric and thermomagnetic effects / 73.23.-b – Mesoscopic systems / 75.50.Lk – Spin glasses and other random magnets
© EDP Sciences, 1998
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