Universal low-temperature behavior of the CePdRhx ferromagnet

V. R. Shaginyan; K. G. Popov; V. A. Stephanovich

doi:10.1209/0295-5075/79/47001

All issues

Volume 79 / No 4 (August 2007)

EPL, 79 4 (2007) 47001

Abstract

Issue		EPL Volume 79, Number 4, August 2007


Article Number		47001
Number of page(s)		6
Section		Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI		https://doi.org/10.1209/0295-5075/79/47001
Published online		18 July 2007

EPL, 79 (2007) 47001

Universal low-temperature behavior of the CePd $_{1-x}$ Rh_x ferromagnet

V. R. Shaginyan¹, K. G. Popov² and V. A. Stephanovich³

¹ Petersburg Nuclear Physics Institute - Gatchina, 188300, Russia
² Komi Science Center, Ural Division, RAS, Syktyvkar - 167982, Russia
³ Opole University, Institute of Mathematics and Informatics - Opole, 45-052, Poland

Corresponding authors: vrshag@thd.pnpi.spb.ru stef@math.uni.opole.pl

Received: 3 June 2007
Accepted: 25 June 2007

Abstract

The heavy-fermion metal CePd $_{1-x}$ Rh_x evolves from ferromagnetism at $x = 0$ to a non-magnetic state at some critical concentration x_c. Utilizing the quasiparticle picture and the concept of fermion condensation quantum phase transition (FCQPT), we address the question about non-Fermi liquid (NFL) behavior of ferromagnet CePd $_{1-x}$ Rh_x and show that it coincides with that of both antiferromagnet YbRh₂(Si_0.95Ge_0.05)₂ and paramagnets CeRu₂Si₂ and CeNi₂Ge₂. We conclude that the NFL behavior being independent of the peculiarities of specific alloy, is universal, while numerous quantum critical points assumed to be responsible for the NFL behavior of different HF metals can be well reduced to the only quantum critical point related to FCQPT.

PACS: 71.27.+a – Strongly correlated electron systems; heavy fermions / 74.20.Fg – BCS theory and its development / 74.25.Jb – Electronic structure

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