| Issue |
Europhys. Lett.
Volume 72, Number 3, November 2005
|
|
|---|---|---|
| Page(s) | 479 - 485 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2005-10249-1 | |
| Published online | 30 September 2005 | |
From ferro- to antiferromagnetism via exchange-striction
of 
Paul-Drude-Institut für Festkörperelektronik - Hausvogteiplatz 5-7 D-10117 Berlin, Germany
Corresponding author: koch@pdi-berlin.de
Received:
22
July
2005
Accepted:
8
September
2005
We investigated the stress evolution in single-crystal 
films on 
upon applying high external magnetic fields
in the 
phase transition regime (10–40 °C)
and beyond. Our stress measurements reveal large field-induced lattice
distortions at temperatures, where β- is present,
even well above the phase transition (
C). A
quantitative comparison with the field-induced increase of
magnetization reveals that the changes in the lattice dimensions can
be fully explained by the (reversible) back-transformation of
β- to α-. Our direction-dependent
experiments identify the structural distortions at the phase
transition as a volume magnetostriction effect and —due to the
persisting magnetocrystalline anisotropy above 
C—
strongly support an antiferromagnetic state for β-
PACS: 75.70.Ak – Magnetic properties of monolayers and thin films / 68.60.Bs – Mechanical and acoustical properties / 75.80.+q – Magnetomechanical and magnetoelectric effects, magnetostriction
© EDP Sciences, 2005
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