From itinerant antiferromagnetism towards localized ferromagnetism in UNi(Al,Ga)

H. Maletta, V. Sechovsky, P.A. Veenhuizen, F.R. Boer, de, L. Havela, G. Hilscher

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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 for x>0.4 with more localized features in the Ga-rich compounds. For x=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.
Original languageEnglish
Pages (from-to)455-460
Number of pages6
JournalZeitschrift für Physik B : Condensed Matter
Issue number4
Publication statusPublished - 1988


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