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  4. Transitions and spin dynamics at very low temperature in the pyrochlores Yb2Ti2O7 and Gd2Sn2O7
 
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research article

Transitions and spin dynamics at very low temperature in the pyrochlores Yb2Ti2O7 and Gd2Sn2O7

Bonville, P.
•
Hodges, J. A.
•
Bertin, E.
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2004
Hyperfine Interactions

The very low temperature properties of two pyrochlore compounds, Yb2Ti2O7 and Gd2Sn2O7, were investigated using an ensemble of microscopic and bulk techniques. In both compounds, a first order transition is evidenced, as well as spin dynamics persisting down to the 20 mK range. The transition however has a quite different character in the two materials: whereas that in Gd2Sn2O7 (at 1 K) is a magnetic transition towards long range order, that in Yb2Ti2O7 (at 0.24 K) is reminiscent of the liquid-gas transition, in the sense that it involves a 4 orders of magnitude drop of the spin fluctuation frequency, with no long range order. We attribute these unusual features to the frustration of the antiferromagnetic exchange interaction in the pyrochlore lattice.

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Type
research article
DOI
10.1023/B:HYPE.0000043235.21257.13
Author(s)
Bonville, P.
•
Hodges, J. A.
•
Bertin, E.
•
Bouchaud, J. P.
•
De Reotier, P. D.
•
Regnault, L. P.
•
Ronnow, H. M.  
•
Sanchez, J. P.
•
Sosin, S.
•
Yaouanc, A.
Date Issued

2004

Published in
Hyperfine Interactions
Volume

156

Issue

1

Start page

103

End page

111

Subjects

frustrated magnetic systems

•

mu SR

•

Mossbauer spectroscopy

•

LATTICE-RELAXATION

•

FIELD

Note

CEA Saclay, Serv Phys Etat Condense, F-91191 Gif Sur Yvette, France. CEA Grenoble, Serv Phys Stat Magnetisme & Supraconduct, F-38054 Grenoble, France. Bonville, P, CEA Saclay, Serv Phys Etat Condense, F-91191 Gif Sur Yvette, France.

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LQM  
Available on Infoscience
January 24, 2007
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/239950
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