TY - JOUR
T1 - Spin reorientation in TlFe 1.6Se 2 with complete vacancy ordering
AU - May, Andrew F.
AU - McGuire, Michael A.
AU - Cao, Huibo
AU - Sergueev, Ilya
AU - Cantoni, Claudia
AU - Chakoumakos, Bryan C.
AU - Parker, David S.
AU - Sales, Brian C.
PY - 2012/8/16
Y1 - 2012/8/16
N2 - The relationship between vacancy ordering and magnetism in TlFe 1.6Se 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 1.6Se 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.
AB - The relationship between vacancy ordering and magnetism in TlFe 1.6Se 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 1.6Se 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.
UR - http://www.scopus.com/inward/record.url?scp=84865267860&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.109.077003
DO - 10.1103/PhysRevLett.109.077003
M3 - Article
AN - SCOPUS:84865267860
SN - 0031-9007
VL - 109
JO - Physical Review Letters
JF - Physical Review Letters
IS - 7
M1 - 077003
ER -