Evidence from thermodynamic measurements for a singlet crystal-field ground state in pyrochlore Tb2Sn2O7 and Tb2Ti2O7
Chapuis, Y.; Yaouanc, A.; de Reotier, P. Dalmas; Marin, C.; Vanishri, S.; Curnoe, S. H.; Vaju, C.; Forget, A.
2010

Abstract

The magnetic entropy variation for the ordered spin-ice Tb2Sn2O7 and the spin-liquid Tb2Ti2O7 measured up to similar to 20 K shows that the crystal-field ground state for both systems is a singlet split from the first excited level by a thermal energy of similar to 2 K. It is the superexchange interactions between the Tb3+ spins which induce the terbium magnetic moments. Our results are analyzed in terms of a tetragonal perturbation for Tb2Ti2O7 and this perturbation plus a molecular field for Tb2Sn2O7.

Details

Title Evidence from thermodynamic measurements for a singlet crystal-field ground state in pyrochlore Tb2Sn2O7 and Tb2Ti2O7
Author(s) Chapuis, Y. ; Yaouanc, A. ; de Reotier, P. Dalmas ; Marin, C. ; Vanishri, S. ; Curnoe, S. H. ; Vaju, C. ; Forget, A.
Published in Physical Review B
Volume 82
Issue 10
Pages 100402(R)
Date 2010
Keywords
DOI https://doi.org/10.1103/PhysRevB.82.100402
Other identifier(s) View record in Web of Science
Laboratories LPMC
Record Appears in Scientific production and competences > SB - School of Basic Sciences > SB Archives > LPMC - Laboratory of Nanostructures and Novel Electronic Materials
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Record creation date 2011-12-16

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