Abstract
Abstract The low-temperature lattice behavior of the pyrochlore magnet Tb 2 Ti 2 O 7 has been investigated by thermal expansion measurements. The thermal expansion coefficient of Tb 2 Ti 2 O 7 shows no anomaly except for a shoulder around 8 K, which can be explained by a Schottky type excitation arising from the energy gap between the ground-state and first excited CEF doublets. The analysis of the thermal expansion behavior combined with the heat capacity data indicates the lack of strong spin-lattice coupling in the thermal expansion at the low temperature region, where the spin liquid state emerges.
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