Abstract
Single crystals of the compounds RMn 6Sn 6 where R=Tb, Ho, Er, Tm, and Lu have been prepared by the flux growth technique. Their magnetic properties were studied in the temperature range from 4.5 to 500 K. TbMn 6Sn 6 and HoMn 6Sn 6 order ferrimagnetically at 450 and 410 K, respectively. Both of these compounds undergo a change in the easy axis, and this transition has been mapped as a function of field and temperature for TbMn 6Sn 6. The other compounds studied (R=Er, Tm, Lu) order antiferromagnetically in zero field. In an applied DC field, a ferrimagnetic structure is found in ErMn 6Sn 6 while TmMn 6Sn 6 exhibits at least two structures at high field, a ferrimagnetic structure and a structure that appears to be half- ferrimagnetic. In LuMn 6Sn 6, the moments are also partially flipped by an applied field.
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