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Magnetic properties of stable N-[(dichlorophenyl)thio]-2,4,6-triphenylphenylaminyl and N-[(dichlorophenyl)thio]-2,4,6-tris(chlorophenyl)phenylaminyl radical crystals |
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| Authors: | Yoshio Teki Koichi Itoh Atsuhiko Okada Hirokazu Yamakage Tatsuo Kobayashi Kiichi Amaya Sinya Kurokawa Sadaharu Ueno |
| Institution: | a Department of Material Science, Faculty of Science, Osaka City University, Sumiyoshi-ku, Osaka 558, Japan b Department of Material Physics, Faculty of Engineering Science, Osaka University, Osaka 560, Japan c Research Center for Materials Science at Extreme Conditions, Osaka University, Osaka 560, Japan d Department of Applied Chemistry, Faculty of Engineering, Osaka City University, Sumiyoshi-ku, Osaka 558, Japan |
| Abstract: | The magnetic properties of N-(dichlorophenyl)thio]-2,4,6-triarylphenylaminyl radical crystals are reported. The three stable thioaminyls show ferromagnetic behaviors described using the one-dimensional Heisenberg model with the large ferromagnetic interaction of 2J/kB = 28.0, 11.4, and 3.6 K. The other two radicals show the antiferromagnetic alternating chain behaviors with 2J/kB = −16.8 K,  = 0.55 and 2J/kB = −128.8 K, = 0.90. The low-temperature susceptibility and heat capacity measurements of the crystal showing 2J/kB = 28.0 K reveal a magnetic phase transition at 0.4 K. The ordered phase shows spin-flop transition which reveals an antiferromagnetic long range order. |
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