Magnetic polymer chains: a Hubbard Study

• Published in: Synthetic metals Vol. 85; no. 1; pp. 1761 - 1762
• Main Authors: dos Santos, M.C., Coutinho Filho, M.D.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 15.03.1997; Amsterdam Elsevier Science; New York, NY
• Subjects: Applied sciences; Electrical, magnetic and optical properties; Exact sciences and technology; magnetic phase transistions; many-body and quasiparticle theories; Organic polymers; Physicochemistry of polymers; Properties and characterization; semi-empirical models and model calculations; many-body and quasiparticle theories; magnetic phase transistions; semi-empirical models and model calculations; Conjugated polymer; Many body theory; Ferrimagnetism; Magnetic material; Magnetic-phase transformations; Polyradical; Theoretical study; Hubbard model; Modeling; Magnetic transition
• ISSN: 0379-6779; 1879-3290
• DOI: 10.1016/S0379-6779(97)80425-0

Molecular or polymeric-based magnetic materials have been the subject of increasing interest in recent years. Organic magnetic structures have been theoretically predicted by Ovchinnikov. One of the most attractive features of these new materials is the possibility of combining mechanical, electrical and/or optical properties of organic materials with magnetic properties. In the present work, we study a class of one-dimensional chains with special topologies that could lead to magnetic order. Using the Hubbard model, we find that these materials should exhibit ferrimagnetic ordering at half-filled band, in agreement with a theorem by Lieb. Away from half filling these systems display a rich magnetic phase diagram.