Successive magnetic transitions in TbNiAl2 studied by neutron diffraction

Abstract: We report measurements of DC (AC) magnetic susceptibility and neutron diffraction on TbNiAl2 alloy. The Rietveld refinements of the x-ray and neutron diffraction data are consistent with an orthorhombic structure of the type MgCuAl2 (space group Cmcm). The results of DC (AC)- magnetic susceptibility show two successive magnetic transitions at 20 K and 11.7 K with antiferromagnetic and ferromagnetic (or ferrimagnetic) features, respectively. On the other hand, neutron diffraction patterns show that, below 20 K and down to 12 K, new reflexions appear, confirming the antiferromagnetic character of the transition observed in the macroscopic measurements. Also, at least one of these new reflexions, located at Q 1.2 Å-1, shifts to higher angles when the temperature decreases, indicating an incommensurate magnetic structure. Below 11 K, many reflexions disappear and new reflexions increase, evidencing a new magnetic transition. © Published under licence by IOP Publishing Ltd.

 Congreso: Meeting of the Spanish Neutron Scattering Association (6º : Segovia : 2012)

 Fuente: Journal of Physics: Conference Series 549 (2014) 012020

Editorial: Institute of Physics

 Año de publicación: 2014

Nº de páginas: 4

Tipo de publicación: Artículo de Revista

 DOI: 10.1088/1742-6596/549/1/012020

ISSN: 1742-6588,1742-6596

Url de la publicación: http://iopscience.iop.org/article/10.1088/1742-6596/549/1/012020/meta;jsessionid=9C433936EC271E866F47E51344D01B03.c4