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Magnetic and structural properties of the CeCo1-xCuxAl4 (x = 0, 0.05, 0.1) compounds

T. TOLIŃSKI1,* , A. HOSER2, N. STÜßER2, A. KOWALCZYK1, D. KACZOROWSKI3

Affiliation

  1. Institute of Molecular Physics, PAS, Smoluchowskiego 17, 60-179 Poznań, Poland
  2. Helmholtz-Zentrum, Glienicker Straße 100, D-14109 Berlin, Germany
  3. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław 2, Poland

Abstract

We report on the neutron diffraction, magnetic susceptibility, specific heat and electrical resistivity studies of the antiferromagnetic CeCo1-xCuxAl4 (x = 0, 0.05, 0.1) compounds. The substitution of the Co atoms by Cu aims to highlight the influence of the impurity phases on the structure stability and on the magnetic properties. For x = 0.1, 0.05 and 0 the magnetic moments of 0.76, 0.74 and 0.69 µB/Ce have been obtained, respectively. The phase transitions observed in the specific heat measurements suggest a presence of a small contribution of the CeCuAl3 and CeAl2 phases. The addition of Cu develops a small amount of the former phase and decreases strongly the amount of any other impurities stabilizing, therefore, the main CeCoAl4 phase. The neutron diffraction below the Néel temperature of 13.5 K confirms most of the previous studies on the magnetic structure of CeCoAl4..

Keywords

Rare earth -intermetallic compounds, Magnetism, Neutron diffraction.

Submitted at: Oct. 3, 2011
Accepted at: Feb. 20, 2012

Citation

T. TOLIŃSKI, A. HOSER, N. STÜßER, A. KOWALCZYK, D. KACZOROWSKI, Magnetic and structural properties of the CeCo1-xCuxAl4 (x = 0, 0.05, 0.1) compounds, Journal of Optoelectronics and Advanced Materials Vol. 14, Iss. 1-2, pp. 90-94 (2012)