Synthesis under ambient pressure and tri-axial magnetic orientation in REBa2Cu4O8 (RE = Y,Sm, Eu,Gd, Dy,Ho, Er) |
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| Authors: | M Yamaki S Horii M Haruta T Maeda J Shimoyama |
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| Institution: | 1. Department of Environmental Systems Engineering, Kochi University of Technology, Tosa-Yamada, Kami-shi, Kochi 782-8502, Japan;2. Department of Applied Chemistry, University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan;3. JST-TRIP, Sanban-cho, Chiyoda-ku, Tokyo 100-0075, Japan;1. Superconductivity Research Laboratory/ISTEC, Tokyo, Japan;2. Waseda University, Tokyo, Japan |
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| Abstract: | We report the rare-earth (RE)-dependent magnetization axes of REBa2Cu4O8, which was synthesized by a flux method under ambient pressure, using powder samples tri-axially oriented in a modulated rotating magnetic field of 10 T. By optimizing the growth temperature and cooling rate, RE124 crystals were successfully grown for RE = Y, Sm, Eu, Gd, Dy, Ho, and Er. From the X-ray diffraction measurement, the magnetically oriented directions were largely dependent on the type of RE ions of RE124. However, the tri-axial magnetic anisotropies of RE124 could be qualitatively understood in terms of the magnitude relation between the single-ion magnetic anisotropy of RE3+ ions and the magnetic anisotropy generated by the CuO2 plane and Cu–O chain. For the practical use of this magneto-scientific process, the control of magnetization axes and tri-axial magnetic anisotropies through crystallochemical control is indispensable. |
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