Issue |
EPL
Volume 104, Number 1, October 2013
|
|
---|---|---|
Article Number | 16001 | |
Number of page(s) | 5 | |
Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
DOI | https://doi.org/10.1209/0295-5075/104/16001 | |
Published online | 28 October 2013 |
Pressure dependence of Morin transition in α-Fe2O3hematite
1 IMPMC, CNRS UMR 7590, Université P&M Curie - 4 Place Jussieu, F-75252 Paris, France
2 Paul Scherrer Institut - CH-5232 Villigen PSI, Switzerland
3 Institut Laue Langevin - F-38043 Grenoble, France
Received: 20 May 2013
Accepted: 30 September 2013
We report high-pressure neutron diffraction data on the Morin-transition TM in α-Fe2O3 hematite, up to 8 GPa and under hydrostatic conditions. We find a strictly linear pressure coefficient of with no evidence for intermediate magnetic states as indicated by all previous non-hydrostatic measurements. The behaviour of TM is highly regular and can well be explained within the framework of Artman et al.'s single-ion model if a change of the single-ion anisotropy energy by +1%/GPa is assumed. Such a value seems not to be unusual for iron oxides.
PACS: 61.50.Ks – Crystallographic aspects of phase transformations; pressure effects / 61.05.F- – Neutron diffraction and scattering / 75.50.Ee – Antiferromagnetics
© EPLA, 2013
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.