Orbital freezing and orbital glass state in FeCr2S4

Low-temperature specific heat measurements and dielectric spectroscopy have been performed on polycrystalline and single-crystalline FeCr2S4, the single crystals showing a transition into a low-temperature orbital glass phase. The freezing of the orbital moments is revealed by a glasslike specific h...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2005-01, Vol.94 (2), p.027601.1-027601.4
Main Authors: FICHTL, R, TSURKAN, V, LUNKENHEIMER, P, HEMBERGER, J, FRITSCH, V, KRUG VON NIDDA, H.-A, SCHEIDT, E.-W, LOIDL, A
Format: Article
Language:English
Subjects:
Collective effects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron states
Exact sciences and technology
Physics
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Low-temperature specific heat measurements and dielectric spectroscopy have been performed on polycrystalline and single-crystalline FeCr2S4, the single crystals showing a transition into a low-temperature orbital glass phase. The freezing of the orbital moments is revealed by a glasslike specific heat anomaly and by a clear relaxational behavior of the dielectric permittivity, exhibiting several hallmark features of glassy dynamics. The orbital relaxation dynamics continuously slows down over six decades in time, before at the lowest temperatures the glass transition becomes suppressed by quantum tunneling.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.94.027601