Eur. Phys. J. B (2013) 86: 18
https://doi.org/10.1140/epjb/e2012-30528-9

Regular Article

Magnetic ordering in Fe_1.087Te under pressure

¹ Department of Chemistry, University of Aarhus, 8000 Aarhus C, Denmark
² Laboratory for Neutron Scattering, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland

^a e-mail: jenserik@chem.au.dk

Received: 28 June 2012
Received in final form: 26 October 2012
Published online: 21 January 2013

Abstract

The crystal and magnetic structures of Fe_1.087Te have been studied by neutron powder diffraction in the temperature range from 1.7 to 80 K at pressures of  ≈0.4 and  ≈1.2 GPa. No symmetry change of the tetragonal paramagnetic ambient pressure phase (space group P4/nmm) was observed for temperatures above 60 K and pressures up to  ≈1.2 GPa. A novel pressure-induced phase of Fe_1.087Te having orthorhombic symmetry (space group Pmmn) and incommensurate antiferromagnetic bicollinear order was observed in the temperature range from 50 to 60 K at  ≈1.2 GPa. The known monoclinic ambient pressure phase of Fe_1.087Te (space group P2₁/n) with commensurate antiferromagnetic order was found to be stable up to at least  ≈1.2 GPa at low temperature.