Magnetic-crystallographic p,T-phase diagram of Fe1.141Te: A high-pressure neutron diffraction study

The crystal and magnetic structures of Fe1.141Te have been studied by neutron powder diffraction in the temperature range from 5 to 106 K and pressures in the range from ambient to ≈2.7 GPa. The p,T‐phase diagram contains three phases with monoclinic, orthorhombic, and tetragonal symmetry. The monoc...

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Bibliographic Details
Published in:physica status solidi (b) 2016-11, Vol.253 (11), p.2257-2264
Main Authors: Jørgensen, Jens-Erik, Hansen, Thomas Christian
Format: Article
Language:English
Subjects:
high pressure
magnetic structure
neutron diffraction
Online Access:Get full text
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Summary:The crystal and magnetic structures of Fe1.141Te have been studied by neutron powder diffraction in the temperature range from 5 to 106 K and pressures in the range from ambient to ≈2.7 GPa. The p,T‐phase diagram contains three phases with monoclinic, orthorhombic, and tetragonal symmetry. The monoclinic phase was found to be stable for T ≲ 57 K and p  2.16 GPa. The monoclinic phase shows commensurate bicollinear antiferromagnetic order with propagation vector k = (½ 0 ½), while the orthorhombic phase is incommensurately antiferromagnetically ordered with propagation vector k = (½‐δ 0 ½). The δ−parameter increases linearly with the pressure for 0.4 ≲ p ≲ 2.16 GPa. Pressure‐induced ferromagnetic order was observed in the tetragonal phase for p ≳ 2.1 GPa and temperatures less than ∼68 K, depending on the pressure.
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.201600285