Magnetic-crystallographic p,T-phase diagram of Fe sub(1.141)Te: A high-pressure neutron diffraction study

The crystal and magnetic structures of Fe sub(1.141)Te have been studied by neutron powder diffraction in the temperature range from 5 to 106K and pressures in the range from ambient to approximately 2.7GPa. The p,T-phase diagram contains three phases with monoclinic, orthorhombic, and tetragonal sy...

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Bibliographic Details
Published in:Physica Status Solidi. B: Basic Solid State Physics 2016-11, Vol.253 (11), p.2257-2264
Main Authors: Joergensen, Jens-Erik, Hansen, Thomas Christian
Format: Article
Language:English
Subjects:
Antiferromagnetism
Crystal structure
Diffraction
Neutron diffraction
Orthorhombic phase
Propagation
Solid state physics
Three phase
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Summary:The crystal and magnetic structures of Fe sub(1.141)Te have been studied by neutron powder diffraction in the temperature range from 5 to 106K and pressures in the range from ambient to approximately 2.7GPa. The p,T-phase diagram contains three phases with monoclinic, orthorhombic, and tetragonal symmetry. The monoclinic phase was found to be stable for T57K and p2.16GPa. The monoclinic phase shows commensurate bicollinear antiferromagnetic order with propagation vector k=(1/2 0 1/2), while the orthorhombic phase is incommensurately antiferromagnetically ordered with propagation vector k=(1/2- delta 0 1/2). The delta -parameter increases linearly with the pressure for 0.4p2.16GPa. Pressure-induced ferromagnetic order was observed in the tetragonal phase for p2.1GPa and temperatures less than 68K, depending on the pressure.
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.201600285