Abstract
UNiAl is an itinerant antiferromagnet with a transition temperature of 18 K and a huge low-temperature Sommerfeld coefficient of 167 mJ/K2 mole U atoms. A systematic study of the pseudoternary series UNiAl1-xGa x by means of magnetic and specific-heat measurements is presented. The data are interpreted as evidence for a transition from antiferromagnetism to ferromagnetism forx>0.4 with more localized features in the Ga-rich compounds. Forx=0.4 competition of ferromagnetic and antiferromagnetic interactions causes a complicated behaviour characterized by two types of magnetic transitions. Huge magnetocrystalline anisotropy is responsible for the rather anomalous behaviour of the ferromagnetic compositions.
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Maletta, H., Sechovsky, V., Veenhuizen, P.A. et al. From itinerant antiferromagnetism towards localized ferromagnetism in UNi(Al, Ga). Z. Physik B - Condensed Matter 72, 455–460 (1988). https://doi.org/10.1007/BF01314526
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DOI: https://doi.org/10.1007/BF01314526