The influence of substitution of Co for Mn on magnetism of the HoMn6−xCoxSn6 compounds (0⩽x⩽0.25) |
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| Authors: | I Dincer Y Elerman E Duman A Elmali H Ehrenberg H Fuess |
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| Institution: | 1. Ankara University, Faculty of Engineering, Department of Engineering Physics, Besevler 06100, Ankara, Turkey;2. Fachbereichphysik, Experimentalphysik, Universitaet Duisburg-Essen, D-47048 Duisburg, Germany;3. Institute for Materials Science, Darmstadt University of Technology, Petersenstrasse 23, D-64287 Darmstadt, Germany |
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| Abstract: | We have studied the effects of Co substitution for Mn on the structure and magnetic properties of the HoMn6−xCoxSn6 compounds (0?x?0.25) with HfFe6Ge6-type structure (space group P6/mmm) by X-ray powder diffraction and magnetization measurements. A monotonic decrease of the lattice parameters a and c is observed with increasing Co content. While the compounds with x=0 and 0.05 exhibit ferrimagnetism in the whole temperature range, the compounds with 0.1?x?0.15 show ferrimagnetism, helimagnetism and re-entrant ferrimagnetism with decreasing temperature. For the compounds with x=0 and 0.05, the spin reorientation temperature is observed. A metamagnetic transition from helimagnetic magnetic ordering to ferrimagnetism is observed for the compounds with x=0.1 and 0.2. The results are summarized in the HoMn6−xCoxSn6 magnetic phase diagram. |
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| Keywords: | 75 20 En 75 25 +z 75 25 &minus m |
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