| Issue |
Europhys. Lett.
Volume 35, Number 6, August III 1996
|
|
|---|---|---|
| Page(s) | 469 - 472 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1996-00137-2 | |
| Published online | 01 September 2002 | |
Antiferromagnetic-to-ferromagnetic transformation
in powdered TDAE-
J. Stefan Institute - Jamova 39, 1001 Ljubljana, Slovenia
Received:
6
May
1996
Accepted:
27
June
1996
Electron spin resonance measurements on powdered 
-
demonstrate
that freshly prepared samples show at first a transition to a low-temperature
“antiferromagnetic”-like phase and that on annealing at room temperature they
transform to the modification which exhibits a transition to the ferromagnetic
ground state. The characteristic time for this transformation is in powdered
samples only of several hours, while in single crystals it is of the order of
several weeks. The above difference could be due to the different strain
distribution which affects the freedom of rotation of the 
ions and thus
the exchange coupling.
PACS: 76.60.Nt – Magnetic annealing and temperature-hysteresis effects / 76.30.-v – Electron paramagnetic resonance and relaxation
© EDP Sciences, 1996
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