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Magnetic properties of Mn-rich Rh2Mn1+xSn1−x Heusler alloys |
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| Authors: | H Yako T Kanomata K Endo RY Umetsu A FujitaR Kainuma H NishiharaKRA Ziebeck |
| Institution: | a Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan b Faculty of Engineering, Tohoku Gakuin University, Tagajo 985-8537, Japan c Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan d Faculty of Science and Technology, Ryukoku University, Otsu 520-2194, Japan e Department of Physics, Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, UK |
| Abstract: | X-ray powder diffraction and magnetization measurements have been carried out on Rh2Mn1+xSn1−x (0≤x≤0.3) alloys. The alloys, which crystallize in the L21 structure, were found to exhibit ferromagnetic behavior. The lattice constant a at room temperature decreases with increasing x, whereas the Curie temperature TC decreases linearly. At 5 K the magnetic moment per formula unit first increases with increasing x and then saturates for x≥0.2. The experimental results are discussed in terms of the influence of the Mn-Mn exchange interactions between the Mn atoms on the Sn and Mn sites. |
| Keywords: | Heusler alloy Magnetic moment Exchange interaction Curie temperature |
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