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Show Polermic Magnets Bretni Kennon and Associate Professor Joel Miller Department of Chemistry Over the years since their discovery, magnetic materials have been, and are increasingly utilized in technology throughout the world. Some of the most widespread applications of magnets are in the electronics, automotive, aerospace, medical, and domestic industries. Classically, these magnets are heavy solid state materials com-posed of metals and metal oxides, and their synthesis requires high temperature metallurgy. The research in Dr. Joel Miller's labs focuses on polymeric magnets which are produced in less extreme environments, similar to the ambient conditions utilized in organic and pharmaceutical synthesis. In essence, we seek to make magnetic plastic. The main classes of magnets our group investigates are organometallic compounds comprised of elec-tron deficient metal atoms bound to carbon-based molecules containing electron rich cyano groups. As with many studies of magnetic compounds, our group desires information on the temperature at which the material begins to magnetically order (become magnetic). The goal of such research is to isolate a material which exhibits magnetic behavior above room temperature. Dr. Miller was among the first to discover compounds of this nature, and studies are being carried out to see the effect that using different metals has on magnetic properties. Current research involves synthesis of molecule-based magnets from metal iodides (MI2, where M= Mn, Fe, Co, or Ni), and an organic ligand, (TCNQ (7,7,8,8-tetracyanoquinodimethane) orTCNE (tetracyanoethylene)). It has been established that during this reaction, io-dine is trapped inside the structure, affecting magnetic properties. Research is being carried out in attempt to determine the function of the iodine impurity. (For example, compounds with Nickel as the metal center will not magnetically order without the iodine impurity.) {79} |
