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Power-law spin correlations in the pyrochlore antiferromagnet Tb(2)Ti(2)O(7).
T Fennell1, M Kenzelmann, B Roessli
1Laboratory for Neutron Scattering, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland. tom.fennell@psi.ch
We studied the rare-earth pyrochlore Tb(2)Ti(2)O(7) at low temperatures. At 0.05 K, we observed power-law spin correlations, indicating a distinct low-temperature magnetic state.
Area of Science:
- Condensed Matter Physics
- Magnetism and Magnetic Materials
- Rare-Earth Compounds
Background:
- The rare-earth pyrochlore Tb(2)Ti(2)O(7) is a material of interest in condensed matter physics.
- It is often characterized as an antiferromagnetic spin liquid with short-range spin correlations.
Purpose of the Study:
- To investigate the low-temperature magnetic state of Tb(2)Ti(2)O(7).
- To determine the nature of spin correlations in Tb(2)Ti(2)O(7) at very low temperatures.
Main Methods:
- Polarized neutron scattering experiments were performed on Tb(2)Ti(2)O(7).
- Data were collected at temperatures of 20 K and 0.05 K.
Main Results:
- At 20 K, the results are consistent with previous descriptions of Tb(2)Ti(2)O(7) as an antiferromagnetic spin liquid.
- At 0.05 K, evidence of pinch-point scattering was observed, indicating the presence of power-law spin correlations.
Conclusions:
- The low-temperature state of Tb(2)Ti(2)O(7) exhibits power-law spin correlations.
- This suggests a more extended and ordered magnetic state than previously assumed at higher temperatures.
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