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Article Dans Une Revue Solid State Communications Année : 2016

Elastic anomalies at the magnetic phase transitions of TBTe3

Michel Saint-Paul
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Christophe Guttin
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Olivier Leynaud
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Pierre Monceau
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Résumé

We report sound velocity and ultrasonic attenuation measurements in the vicinity of the successive magnetic phase transitions Tmag1~6.5 K,Tmag2~5.8 K and Tmag3~5.3 K in the charge density wave TbTe3 compound. A detailed investigation of the critical contributions to the temperature dependences of the sound velocity and ultrasonic attenuation is presented. Anisotropic stress dependences Tmag1/dp found at the antiferromagnetic phase transition Tmag1 is associated with the layered structure of this compound. An abrupt step-like increase in the velocity and a sharp peak in the attenuation are observed with the longitudinal and shear modes at the lock-in magnetic phase transition Tmag3=5.3 K. The critical velocity and attenuation behaviors in the high temperature paramagnetic state above Tmag1 are described in terms of a phenomenological dynamic scaling expression.
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Dates et versions

hal-01324393 , version 1 (31-05-2016)

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Citer

Michel Saint-Paul, Christophe Guttin, Pascal Lejay, Olivier Leynaud, Pierre Monceau. Elastic anomalies at the magnetic phase transitions of TBTe3. Solid State Communications, 2016, 240, pp.15-19. ⟨10.1016/j.ssc.2016.04.017⟩. ⟨hal-01324393⟩

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