| Issue |
Europhys. Lett.
Volume 39, Number 6, September 1997
|
|
|---|---|---|
| Page(s) | 675 - 683 | |
| Section | Condensed matter: electronic, structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1997-00414-0 | |
| Published online | 01 September 2002 | |
Dynamical measurements of nucleation and propagation in a domain wall junction at low temperature
1
Laboratoire de Magnétisme Louis Néel, CNRS, BP. 166, 38042 Grenoble Cedex
9, France
2
Laboratoire de Physique des Matériaux, Université Henri Poincaré-Nancy I,
BP. 239, 54506 Vandoeuvre les Nancy Cedex, France
3
Centre de Recherche sur les Très Basses Températures, CNRS, BP. 166, 38042 Grenoble
Cedex 9, France
4
Laboratoire de Microstructures et Microélectroniques, CNRS, 196 Avenue Ravera, 92220
Bagneux, France
Received:
18
November
1996
Accepted:
29
July
1997
GdFe (1000 Å)/TbFe (e)/GdFe (500 Å) sandwiches, where the thickness e of the TbFe film can
be as small as 2 Å, constitutes a Domain Wall Junction (DWJ). In this device, a 
domain wall, nucleated in the thicker GdFe layer, crosses an artificial energy barrier (the TbFe
layer), by thermal activation (above 1 K). DWJs constitute a model system for the study of
nucleation, pinning and depinning of a domain wall, in both thermal activation and quantum
regimes. In the present case, quantum tunnelling of magnetisation is suggested below 0.7 K.
PACS: 75.60.Ch – Domain walls and domain structure / 75.70.-i – Magnetic films and multilayers / 75.45.+j – Macroscopic quantum phenomena in magnetic systems
© EDP Sciences, 1997
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