Ground-state order and spin-lattice coupling in tetrahedral spin systems Cu2Te2O5X2 (X = Br or Cl)

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Version: Final published version
Serval ID
serval:BIB_F6CC1D97AC5B
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Ground-state order and spin-lattice coupling in tetrahedral spin systems Cu2Te2O5X2 (X = Br or Cl)
Journal
Physical Review B
Author(s)
Prester M., Smontara A., Zivkovic I., Bilusic A., Drobac D., Berger H., Bussy F.
ISSN-L
1098-0121
Publication state
Published
Issued date
2004
Peer-reviewed
Oui
Volume
69
Pages
180401
Language
english
Abstract
High-resolution ac susceptibility and thermal conductivity measurement
on Cu2Te2O5X2 (X=Br,Cl) single crystals are reported. For Br-sample,
sample dependence prevents one from distinguishing between possibilities
of magnetically ordered and spin-singlet ground states. In Cl-sample a
three-dimensional transition at 18.5 K is accompanied by almost
isotropic behavior of susceptibility and almost switching behavior of
thermal conductivity. Thermal conductivity studies suggest the presence
of a tremendous spin-lattice coupling characterizing Cl- but not
Br-sample. Below the transition Cl-sample is in a complex magnetic state
involving AF order but also the elements consistent with the presence of
a gap in the excitation spectrum.
Open Access
Yes
Create date
01/10/2012 19:07
Last modification date
20/08/2019 16:23
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