Magnetoelasticity and H-T phase diagram of TbNi2B2C

M. Elmassalami; Mehdi Amara; Rose-Marie Galéra; Denys Schmitt; H. Takeya

doi:10.1103/PhysRevB.76.104410

Journal articles

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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Journal articles

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Physics [physics]

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Submitted on : Wednesday, December 10, 2008 - 12:55:00 PM
Last modification on : Tuesday, October 19, 2021 - 11:03:56 PM

Magnetoelasticity and H-T phase diagram of TbNi2B2C

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Magnetoelasticity and H-T phase diagram of TbNi2B2C

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