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Swift heavy ion induced magnetic phase transition of Fe–Rh alloy |
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| Authors: | M Fukuzumi Y Chimi N Ishikawa F Ono S Komatsu A Iwase |
| Affiliation: | aDepartment of Metallurgy and Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuencho, Sakai, Osaka 599-8531, Japan bDepartment of Materials Science, Japan Atomic Energy Research Institute (JAERI-Tokai), Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan cDepartment of Physics, Okayama University, 2-1-1 Tsushima-Naka, Okayama 700-8530, Japan dResearch Institute for Advanced Science and Technology, Osaka Prefecture University, 1-2 Gackuencho, Sakai, Osaka 599-8570, Japan |
| Abstract: | We report the effects of swift heavy ion irradiation on structure and magnetic properties of Fe–50at.%Rh alloys. The alloys are irradiated with 120–200 MeV heavy ions (Ni, Kr or Xe) at room temperature. Before and after the irradiations, the magnetization and the lattice parameter are measured by using superconducting quantum interference device (SQUID) and X-ray diffractometer (XRD), respectively. The lattice parameter at room temperature increases by about 0.3% and antiferromagnetic–ferromagnetic transition temperature decreases below 5 K by the irradiations. Effects of electronic excitation due to swift heavy ions on the change in magnetic properties and lattice structure are discussed. |
| Keywords: | Fe–Rh alloy Antiferromagnetic–ferromagnetic transition Swift heavy ion irradiation High-density electronic excitation |
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