Proposal to Purchase a SQUID magnetometer

Virginia Polytechnic Institute And State University, Blacksburg VA

Investigators

Abstract

With this award from the Chemistry Research Instrumentation and Facilities (CRIF) Program, the Department of Chemistry at Virginia Polytechnic Institute and State University will acquire a Superconducting Quantum Interface Device (SQUID) magnetometer. This equipment will enable researchers to carry out studies on a) synthesis and characterization of molecule-based magnets; b) magnetic targeting of drugs in vivo; c) development of ferromagnetic, ferroelectric and ferroelastic materials; d) properties of alkyl-substituted metallocenes and indacenes; and e) the synthesis of stable and persistent organic radicals that are capable of chelating transition metals. A SQUID magnetometer is critical for studying the magnetic properties of materials, particularly for weakly magnetic/small moment samples. In a DC magnetization measurement, one measures the magnetic moment as a function of applied DC magnetic field (and/or temperature). Using DC magnetization experiments, one can determine magnetic moments or a hysteresis curve, or identify magnetic phase transitions. In such a fashion, complete magnetic characterization of single crystal samples and films is possible. These types of measurements are essential in order to understand polymers and thin films.