Issue |
Europhys. Lett.
Volume 36, Number 2, October II 1996
|
|
---|---|---|
Page(s) | 147 - 152 | |
Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
DOI | https://doi.org/10.1209/epl/i1996-00201-y | |
Published online | 01 September 2002 |
Effect of microwaves on domain wall motion in thin Ni wires
Department of Physics, Purdue University - West Lafayette,
IN 47907-1396, USA
Received:
24
May
1996
Accepted:
29
August
1996
We report new results on domain wall motion
in very narrow ( diameter) Ni wires.
In previous work we have presented evidence that
the magnetoresistance can be used to observe the
pinning and depinning of domain walls from
what we believe are structural defects.
Those results suggest that at low temperatures the depinning
can occur via quantum tunneling of a wall through the associated pinning
barrier. In the present paper we describe
new results for the effects of microwave radiation on this behavior.
This radiation
alters the tunneling probability in a manner which suggests that
the energy levels of a domain wall are
quantized, much like those of a particle in a potential well.
PACS: 75.45.+j – Macroscopic quantum phenomena in magnetic systems / 75.60.Ch – Domain walls and domain structure / 73.23.Ps – Other electronic properties of mesoscopic systems
© EDP Sciences, 1996
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