Spin Reorientation in TlFe1.6Se2 with Complete Vacancy Ordering

May, Andrew F.; McGuire, Michael A.; Cao, Huibo; Sergueev, I.; Cantoni, Claudia; Chakoumakos, Bryan C.; Parker, David S.; Sales, Brian C.

doi:10.1103/PhysRevLett.109.077003

Title: Spin Reorientation in TlFe1.6Se2 with Complete Vacancy Ordering

Journal Article · Wed Aug 01 00:00:00 EDT 2012 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.109.077003· OSTI ID:1048722

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^[1]; Sergueev, I. ^[2]; Cantoni, Claudia ^[1];

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^[1]

ORNL
European Synchrotron Radiation Facility (ESRF)

The relationship between vacancy ordering and magnetism in TlFe{sub 1.6}Se{sub 2} has been investigated via single crystal neutron diffraction, nuclear forward scattering, and transmission electron microscopy. The examination of chemically and structurally homogeneous crystals allows the true ground state to be revealed, which is characterized by Fe moments lying in the ab plane below 100 K. This is in sharp contrast to crystals containing regions of order and disorder, where a competition between c axis and ab plane orientations of the moments is observed. The properties of partially disordered TlFe{sub 1.6}Se{sub 2} are, therefore, not associated with solely the ordered or disordered regions. This contrasts the viewpoint that phase separation results in independent physical properties in intercalated iron selenides, suggesting a coupling between ordered and disordered regions may play an important role in the superconducting analogues.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-00OR22725

OSTI ID:: 1048722

Journal Information:: Physical Review Letters, Vol. 109, Issue 7; ISSN 0031-9007

Country of Publication:: United States

Language:: English

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Title: Spin Reorientation in TlFe1.6Se2 with Complete Vacancy Ordering

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