Elastic anomalies at the magnetic phase transitions of TbTe3. (August 2016)

• Record Type: Journal Article
• Authors: Saint-Paul, M.; Guttin, C.; Lejay, P.; Leynaud, O.; Monceau, P.
• Is Part Of: Solid state communications. Volume 240(2016)
• Page Start: 15
• Page End: 19
• Publication Date: 2016-08
• Subjects: A. Rare earth tritellurides -- D. Magnetic phase transition -- E. Ultrasonic attenuation; Solid state chemistry -- Periodicals; Solid state physics -- Periodicals; Chimie de l'état solide -- Périodiques; Physique de l'état solide -- Périodiques; 530.41
• DOI: 10.1016/j.ssc.2016.04.017
• Languages: English
• ISSNs: 0038-1098

Abstract

Abstract: We report sound velocity and ultrasonic attenuation measurements in the vicinity of the successive magnetic phase transitions T mag1 ~6.5 K, T mag2 ~5.8 K and T mag3 ~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 ∂ T m a g 1 / ∂ σ found at the antiferromagnetic phase transition T mag1 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 T mag3 =5.3 K. The critical velocity and attenuation behaviors in the high temperature paramagnetic above T mag1 are described in terms of a phenomenological dynamic scaling expression. Highlights: Large anomalies in the velocity and ultrasonic attenuation at the magnetic phase transitions of TbTe3 . Critical behavior is analyzed.