Molecule- and polymer-based magnets,a new frontier |
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| Affiliation: | 1. Department of Physics and Department of Chemistry, The Ohio State University, Columbus, OH 43210-1106, USA;2. Department of Chemistry, University of Utah, Salt Lake City, UT 84112, USA;1. Unité de recherche: Matériaux Nouveaux et Dispositifs Electroniques organiques, UR 11ES55, Faculté des Sciences de Monastir, 5000 Monastir, Tunisia;2. Institut des Matériaux Jean Rouxel, CNRS-UMR 6502, 2 Rue de la Houssinière, BP 32229, 44322 Nantes cedex 3, France;1. Universidad de Buenos Aires, Facultad de Ingeniería, Laboratorio de Sólidos Amorfos, Av. Paseo Colón 850, C1063ACV, Buenos Aires, Argentina;2. CONICET - Universidad de Buenos Aires, Instituto de Tecnologías y Ciencias de la Ingeniería “Hilario Fernández Long” (INTECIN), Av. Paseo Colón 850, C1063ACV, Buenos Aires, Argentina;3. Departamento de Física Aplicada, Institut Universitari de Ciència dels Materials, Universitat de Valencia, c/Doctor Moliner 50, E-46100 Burjassot, Valencia, Spain;4. Instituto de Física La Plata (IFLP) y Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP)-CCT La Plata CONICET, C.C. 67, CP 1900, La Plata, Argentina;5. Universidad Nacional del Noroeste de la Provincia de Buenos Aires (UNNOBA), Monteagudo 2772, Pergamino, CP 2700, Buenos Aires, Argentina;1. Department of Applied Physics, National University of Kaohsiung, Kaohsiung, Taiwan, ROC;2. Department of Physics, National Sun Yat-sen University, Kaohsiung, Taiwan, ROC |
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| Abstract: | Molecule- and polymer-based magnets prepared by relatively low temperature organic synthetic methodologies are of increasing interest in materials research. The three distinct models enabling the design of new molecule- and polymer-based magnetic materials are given. Bulk ferromagnetic behavior with hysteresis was first observed below the critical (Curie) temperature, Tc, of 4.8 K for FeIII(C5Me5)2]+ TCNE] − (Me = methyl; TCNE = tetracyanoethylene). Since then, many new classes of molecule- and polymer-based magnets have been discovered, including those with Tc above room temperature, such as V(TCNE)x· y(CH2Cl2). The important roles of spin and spatial anisotropy and also disorder are illustrated. The, anticipated properties of such molecule- and polymer-based magnetic materials may enable their use in future generations of electronic, magnetic and/or photonic/photronic devices ranging from information storage and magnetic imaging to static and low frequency magnetic shielding and magnetic induction. |
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