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Uranium compounds prepared by sputter deposition: UFe2+x

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, , Citation A Adamska et al 2010 J. Phys.: Conf. Ser. 200 012057 DOI 10.1088/1742-6596/200/1/012057

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1 Charles University, Faculty of Mathematics and Physics, Ke Karlovu 5, Prague 2, CZ-12116 The Czech Republic

2 European Commission, Joint Research Centre, Institute for Transuranium Elements, Postfach 2340, D-75125 Karlsruhe, Germany

3 Institute of Physics, Pedagogical University, Podchorazych 2, 30-084 Kraków, Poland

4 Institute of Material Science, Darmstadt University of Technology, Petersenstrasse 23, D-64287 Darmstadt, Germany

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1742-6596/200/1/012057

Abstract

UFe2 is one of rare examples of combination of 3d and 5f magnetism in a compound with relatively high TC = 162 K. U-excess is known to reduce the TC value markedly. To prepare the Laves phase with an Fe excess is much more difficult. It can be achieved by sputter deposition, but the structure becomes amorphous. TC can increase at least to 240 K (for UFe4), but the segregation of α-Fe cannot be avoided for very high Fe concentrations.

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10.1088/1742-6596/200/1/012057