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research article
Evidence from thermodynamic measurements for a singlet crystal-field ground state in pyrochlore Tb2Sn2O7 and Tb2Ti2O7
2010
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.
Type
research article
Web of Science ID
WOS:000281486100001
Authors
Chapuis, Y.
•
Yaouanc, A.
•
de Reotier, P. Dalmas
•
Marin, C.
•
Vanishri, S.
•
Curnoe, S. H.
•
•
Forget, A.
Publication date
2010
Published in
Volume
82
Issue
10
Article Number
100402(R)
Subjects
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
December 16, 2011
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