Phase transition in SbCl5 - graphite studied by spin resonance experiments |
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| Affiliation: | 1. National Engineering Research Center for Rare Earth, Grirem Advanced Materials Co., Ltd., Beijing 100088, China;2. Rare Earth Functional Materials (Xiong''an) Innovation Center Co., Ltd., Xiong''an, 071700, China;3. Grirem Hi-Tech Co., Ltd., Langfang 065201, China;4. General Research Institute for Nonferrous Metals, Beijing 100088, China;1. Section of Allergy and Clinical Immunology, Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, MB R3E 0Z2, Canada;2. University of British Columbia Center for Heart Lung Innovation, St Paul''s Hospital, Vancouver, BC, Canada |
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| Abstract: | Conduction Carrier Spin Resonance (CCSR) experiments in stage 3 and 4 acceptor SbCl5 - Graphite Intercalated Compounds (GICs) reveal an almost stage independent phase transition at Tc ≋ 225K. The CCSR linewidth shows an anomalous broadening below Tc, which is observable only when the sample is kept in a region close to Tc (190–225K); the broadening was not observed for rapid cooling. This broadening has a much faster kinetics for heating than for cooling rum. These thermal hysteresis and kinetics are quite similar to those found in AlCl3-GICs. We attribute this phase transition to the quasi-2D “solid liquid” transformation experienced by the minority molecules of SbCl3 present among the intercalated species in SbCl5-GICs, proposed by Homma and Clarke. For stage 2 data does not show evidences of this phase transition. |
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