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Magnetic and electrical properties of (U, Th)T2Sn2 (T  Co, Ni, Cu) intermetallics

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Kaczorowski, D., Zolnierek, Z., Geibel, C., & Steglich, F. (1993). Magnetic and electrical properties of (U, Th)T2Sn2 (T  Co, Ni, Cu) intermetallics. Journal of Alloys and Compounds, 200, 115-121. doi:10.1016/0925-8388(93)90480-B.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-DD06-D
Abstract
We report preliminary results of our structural, magnetic and electrical studies on the new ternary stannides (U, Th)T2Sn2 (T = Co, Ni, Cu). All the phases crystallize in a tetragonal symmetry with the CaBe2Ge2-type crystal structure. While UCu2Sn2 and UNi2S2 are antiferromagnets with T(N) values of 108 K and 35 K respectively, UCo2Sn2 exhibits a more complex magnetic behaviour with two subsequent maxima in the temperature variation of the magnetic susceptibility and a strong field dependence of the magnetization. The thorium intermetallics do not exhibit any magnetic ordering except for ThCo2Sn2 that orders antiferromagnetically at 65 K. Both a complex magnetic behaviour of UCo2Sn2 and antiferromagnetic properties of its thorium counterpart suggest that as well as uranium the cobalt atoms in this stannide also carry magnetic moments. For all the uranium compounds the electrical resistivity in the paramagnetic region rises monotonically with increasing temperature, but it exhibits a more metallic behaviour for the thorium-based materials.