Magnetic and Electronic Properties in Series of GdTxGa4-x Solid Solutions (T = Ni or Cu)

P. Wiśniewski, R. Gorzelniak and D. Kaczorowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław, Poland

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We present results of extensive measurements of magnetic susceptibility, electrical resistance, specific heat and thermoelectric power of two series of solid solutions GdNixGa4-x and GdCuxGa4-x, for ranges of doping x from 0.6 to 1 and from 1 to 1.5, respectively. All studied phases display the Curie-Weiss behaviour of magnetic susceptibility and antiferromagnetic ordering at temperatures below 23 K. Substitution of gallium with transition metal atoms has strong influence on Néel temperatures of all studied phases, shifting them by few K, depending on x. Metamagnetic-like anomalies are observed for some compositions. Behaviour of the electrical resistivity reveals metallic nature of all samples. Their magnetic ordering is reflected in low-temperature anomalies of the resistivity and the heat capacity.

DOI: 10.12693/APhysPolA.127.382 PACS numbers: 75.50.Ee, 72.15.-v, 72.15.Jf