High-pressure study of the non-Fermi liquid material U_2Pt_2In

Дата и время публикации : 2000-09-21T12:39:37Z

Авторы публикации и институты :
P. Estrela
A. de Visser
T. Naka
F. R. de Boer
L. C. J. Pereira

Ссылка на журнал-издание: Eur. Phys. J. B 23 (2001) 449-454
Коментарии к cтатье: 21 pages (including 5 figures); pdf format
Первичная категория: cond-mat.str-el

Все категории : cond-mat.str-el

Краткий обзор статьи: The effect of hydrostatic pressure (p<= 1.8 GPa) on the non-Fermi liquid state of U_2Pt_2In is investigated by electrical resistivity measurements in the temperature interval 0.3-300 K. The experiments were carried out on single-crystals with the current along (I||c) and perpendicular (I||a) to the tetragonal axis. The pressure effect is strongly current-direction dependent. For I||a we observe a rapid recovery of the Fermi-liquid T^2-term with pressure. The low-temperature resistivity can be analysed satisfactorily within the magnetotransport theory of Rosch, which provides strong evidence for the location of U_2Pt_2In at an antiferromagnetic quantum critical point. For I||c the resistivity increases under pressure, indicating the enhancement of an additional scattering mechanism. In addition, we have measured the pressure dependence of the antiferromagnetic ordering temperature (T_N= 37.6 K) of the related compound U_2Pd_2In. A simple Doniach-type diagram for U_2Pt_2In and U_2Pd_2In under pressure is presented.

Category: Physics