Issue |
Europhys. Lett.
Volume 60, Number 1, October 2002
|
|
---|---|---|
Page(s) | 148 - 154 | |
Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
DOI | https://doi.org/10.1209/epl/i2002-00332-7 | |
Published online | 01 September 2002 |
EPR-coupling effect in
: Quantum evidence
for a tunneling phenomenon
Laboratoire de Physique des Solides, Bât. 510,
Université Paris-Sud 91405 Orsay, France
Received:
7
January
2002
Accepted:
23
May
2002
Using Electron Paramagnetic Resonance, it has been shown that a
static magnetic field perpendicular to the easy magnetization axis
of an molecule could increase the tunneling
effect. In practice, the static magnetic field cannot be strictly
perpendicular to the easy axis, a slight component parallel to
this axis remains. Here, it is shown that this component can
change completely the shape of the line. This behaviour is due to
a non-constant coupling coefficient, which is calculated here.
Then, experimental data are compared to these predictions, and
good agreement is obtained.
PACS: 76.30.-v – Electron paramagnetic resonance and relaxation / 75.45.+j – Macroscopic quantum phenomena in magnetic systems / 75.50.Tt – Fine-particle systems; nanocrystalline materials
© EDP Sciences, 2002
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