Issue |
Europhys. Lett.
Volume 46, Number 5, June I 1999
|
|
---|---|---|
Page(s) | 667 - 670 | |
Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
DOI | https://doi.org/10.1209/epl/i1999-00317-0 | |
Published online | 01 September 2002 |
Singlet-triplet energy gap in the non-ferromagnetic
modification of
TDAE-
J. Stefan Institute - Jamova 39, 1000 Ljubljana, Slovenia
Received:
15
October
1998
Accepted:
16
March
1999
The ESR intensity of the modification of TDAE-
vanishes below 20 K in
contrast to the α modification where the ESR intensity tremendously increases
due to the ferromagnetic transition. The proton NMR spectra of the
modification
show a single temperature independent NMR line close to the Larmor frequency.
Both the ESR and the NMR results can be understood by the existence of S=0
spin pairing in the ground state of the non-ferromagnetic
modification
of TDEA-
at low temperatures.
PACS: 71.20.-b – Electron density of states and band structure of crystalline solids / 76.30.-v – Electron paramagnetic resonance and relaxation / 75.50.-y – Studies of specific magnetic materials
© EDP Sciences, 1999
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