Heat capacity anomalies in Fe8 single crystal |
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| Institution: | 2. Department of Chemistry, University of Florence, Via Maragliano 77, I-550144 Firenze, Italy;1. Faculty of Maritime Studies and Transport, University of Ljubljana, Pot pomorscakov 4, SI-6320 Portoroz, Slovenia;2. Faculty of Transport and Traffic Sciences, University of Zagreb, Vukeliceva 4, 10 000 Zagreb, Croatia;1. Sustainable Energy Technologies Department, Brookhaven National Laboratory, Upton, NY 11973, USA;2. Center of Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973, USA |
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| Abstract: | A preliminary heat capacity study of Fe8 molecules as a function of applied magnetic field, temperature and measuring frequency is presented. The heat capacity versus temperature curve shows in zero field several peaks between 2 and 3 K. The anomalies shift to a lower temperature when a magnetic field is applied. With increasing field the peaks are smeared. No frequency dependence could be established in the measured range of ω =217–4440 Hz. We have also performed heat capacity measurements as a function of magnetic field at fixed temperature. Between 2 and 3 K a pattern of well developed peaks at discrete magnetic field values is observed. The pattern strongly changes in the small temperature range between 2.3 and 2.5 K. |
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