| Issue |
Europhys. Lett.
Volume 53, Number 5, March 2001
|
|
|---|---|---|
| Page(s) | 591 - 597 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00193-6 | |
| Published online | 01 December 2003 | |
Phonon effects and ESR in 
1
Physikalisches Institut, Universität
Frankfurt - D-60054 Frankfurt, Germany
2
Department of Physics, Tokyo Institute of
Technology - Tokyo 152-8551, Japan
Received:
8
September
2000
Accepted:
14
December
2000
We perform ultrasonic and ESR experiments up to 50
in
. As a function of temperature we find anomalies
for the elastic constants c22 and c66 around the
structural transition at 70
. As a function of magnetic field
we observe pronounced effects for these modes at the beginning and
end of each magnetisation plateau. A linear relation of the
c66 mode and the magnetic susceptibility is observed. The ESR
modes follow a linear field dependence within the magnetic
plateaus.
PACS: 62.65.+k – Acoustical properties of solids / 75.45.+j – Macroscopic quantum phenomena in magnetic systems / 76.30.-v – Electron paramagnetic resonance and relaxation
© EDP Sciences, 2001
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