Magnetic structures of YbMn6-yFeySn6 (y < 1.5)
We wish to investigate the composition and temperature dependence of the magnetic structure in YbMn6-yFeySn6 (y < 1.5). YbMn6Sn6 is an easy plane ferromagnet involving intermediate valent non-magnetic Yb. From DC magnetization it was observed that partial Fe for Mn substitution yields the emergence of a low-temperature antiferromagnetic-like state (likely helimagnetic)whose temperature extent increases with the Fe content. For high enough Fe content (x > 1), the high-temperature ferromagnetic region fully disappears. In all alloys, Yb seems to remain non-magnetic. Powder neutron diffraction is mandatory to determine the spin structure (and its changes with temperature and yFe), to precise the Mn/Fe distribution over the four available crystallographic sites and to confirm the lack of magnetic order of the Yb sublattice.
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EICHENBERGER Lucas; MAGNETTE Arnaud; MALAMAN Bernard; T. Mazet; NASSIF Vivian and A. Vernière. (2017). Magnetic structures of YbMn6-yFeySn6 (y < 1.5). Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2509
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