Magnetic structure determination of ternary intermetallic compounds in the U-Mn-Ge system.
The association of U with Ge in intermetallics gives birth to some of the most intriguing solid state phenomena: coexistence of superconductivity with ferromagnetic order, magnetic ordering of U-sublattice despite very short U-U distances. Consequently, ternary U-Mn-Ge compounds, where Mn may also carry a magnetic moment and undergo magnetic ordering, must exhibit fascinating physical properties and magnetic structures. Up to now, this system was poorly investigated with only 3 compounds reported, among which the magnetic structure was resolved for UMn2Ge2 only. Our study highlights the existence of 6 further ternary compounds in this system. Magnetic ordering of the Mn- and/or U-based sublattices in these germanides is either revealed by preliminary measurements or expected. In order to understand how these magnetic sublattices cooperate in these compounds, accurate magnetic structure determinations by neutron powder diffraction are necessary. Magnetization, specific heat and electrical resistivity measurements are in progress and will complete this study.
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LEMOINE Pierric; FRYARS Stephanie; MALAMAN Bernard; NASSIF Vivian; PASTUREL Mathieu; Carmelo Prestipino and A. Vernière. (2019). Magnetic structure determination of ternary intermetallic compounds in the U-Mn-Ge system.. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2667
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