Magnetoelasticity and H-T phase diagram of TbNi2B2C

M. Elmassalami 1 Mehdi Amara 2 Rose-Marie Galéra 2 Denys Schmitt 3 H. Takeya 4
1 Instituto de Fisica
2 MagSup - Magnétisme et Supraconductivité
NEEL - Institut Néel
3 LGIT - Laboratoire de Géophysique Interne et Tectonophysique
4 National Institute for Materials Science
Abstract : We investigated the magnetoelastic and magnetic properties of single-crystal TbNi2B2C within the paramagnetic and ordered phases and along both a and c axes. The measured paramagnetic and gamma-parastriction susceptibilities are satisfactorily reproduced by the theoretical calculations based on crystalline electric field and molecular field approximations. The features of the gamma-symmetry lowering mode indicate a noticeable orthorhombic distortion within both paramagnetic and magnetically ordered regions. The H-T phase diagram (H||a) reveals a cascade of transformations that delineate the phase boundaries between a weak-ferromagnetic (WF) phase, an intermediate phase, and a paramagnetic saturated state. Interestingly, below 9 K and within the low-field regime, the phase boundary enclosing the WF state shows a reentrant behavior. Such a reentrance feature is associated with the presence of the net ferromagnetic component below TWF.
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Physical Review B : Condensed matter and materials physics, American Physical Society, 2007, 76 (10, article n° 104410), pp.NIL_368-NIL_374. 〈10.1103/PhysRevB.76.104410〉
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https://hal-insu.archives-ouvertes.fr/insu-00345892
Contributeur : Pascale Talour <>
Soumis le : mercredi 10 décembre 2008 - 12:55:00
Dernière modification le : mercredi 19 septembre 2018 - 01:24:00

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M. Elmassalami, Mehdi Amara, Rose-Marie Galéra, Denys Schmitt, H. Takeya. Magnetoelasticity and H-T phase diagram of TbNi2B2C. Physical Review B : Condensed matter and materials physics, American Physical Society, 2007, 76 (10, article n° 104410), pp.NIL_368-NIL_374. 〈10.1103/PhysRevB.76.104410〉. 〈insu-00345892〉

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