High temperature superconductor micro SQUID magnetometer for molecular-based magnets |
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| Authors: | Keiji Takeda Hiroko Tokoro Fumiyoshi Hakoe Akira Yamaguchi Hatsumi Mori Hidehiko Ishimoto Takayoshi Nakamura Shinya Kuriki Shin-ichi Ohkoshi |
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| Institution: | 1. Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;2. Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan;3. Research Institute for Electronic Science, Hokkaido University, Kita 12 Nishi 6, Sapporo, Hokkaido 060-0812, Japan |
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| Abstract: | We have developed a high temperature superconductor (HTS) micro SQUID magnetometer for molecular-based magnets. By employing the dipole approximation, we verified the flux value of 40Φ0 from the saturation magnetic moment of the ferrimagnetic microcrystal of Mn2(H2O)2(CH3COO)]W(CN)8] · 2H2O (15 × 15 × 13 μm). Considering the relative arrangement of the sample and the SQUID loop, including the influence of the film and grease, the calculated the flux values were Φ = 71Φ0 and 31Φ0 at distances of 20 and 30 μm between the sample bottom face and the SQUID plane, respectively. Thus, the experimentally obtained flux value is reasonable. |
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