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Magnetic ordering in U4Cu4P7 single crystal |
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| Authors: | P Burlet R Troc D Kaczorowski H Noël J Rossat-Mignod |
| Institution: | a Centre d'Etudes Nucléaires, DRFMC-SPSMS/MDN, 85 X, 38041, Grenoble Cédex, France b W. Trzebiatowski Institute for Low Temperature and Structure Research, Polish Academy of Sciences, 50-950, Wroclaw, Poland c Université de Rennes, U.R.A.C.N.R.S. 1495 “Chimie du Solide et Inorganique Moléculaire”, Avenue du Général Leclerc, 35042, Rennes Cédex, France d Laboratoire Léon Brillouin, CEA-CNRS, Centre d'Etudes de Saclay, 91191, Gif sur Yvette, France |
| Abstract: | The magnetic ordering in the tetragonal ternary compound U4Cu4P7 has been studied by neutron diffraction. It orders below TN = 146 K with an antiferromagnetic structure of wave vector k = (001). The magnetic ordering corresponds to a stacking of ferromagnetic (001) uranium planes according to the sequences m1, m1, m2, -m2, -m1, -m1, -m2, m2 where m1 and m2 represent the magnetic moment, directed along the tetragonal axis of the two uranium sites U(1) (0,0,± z1) and U(2) (0,0, ± z2) respectively. The magnetic moments on these two sites have different temperature dependencies as well as well as they reach the different values of 1.1 and 2.2.μB for the U(1) and U(2) sites, respectively. |
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