William A. Hines
Faculty William A. Hines Ph.D., Professor of Physics Research Group Affiliation:
Condensed Matter Physics
University of Connecticut
2152 Hillside Road, U-3046
Storrs, CT 06269-3046
Room No: BSP-G42
Phone: (860) 486 2343
Fax: (860) 486 3346

Current Research:

Structural, magnetic, and electronic properties of ruthenate systems.

Currently, the major thrust of our research effort concerns ruthenate systems with the ABO3 perovskite and related crystal structures. These 4d transition-metal oxides are found to have very interesting physical properties such as superconductivity, magnetic ordering, and large magnetoresistance. Furthermore, these physical properties depend sensitively on the composition and synthesis conditions. Of crucial importance is an understanding of the electronic, magnetic and atomic structures, and their relationship to the physical properties. In particular: (a) Work is being carried out on the Sr1-xCaxRuO3 system, using both polycrystalline and single crystal samples. The replacement of Sr by the isoelectronic Ca maintains the metallic-like conductivity while suppressing the magnetic ordering temperature. Also, it is found that the synthesis of SrRuO3 under high pressure oxygen reduces the ordering temperature. (b) Work is being carried out on the intriguing RuSr2RECu2O8 system, where RE is a rare-earth such as Gd or Eu. This system is striking due to the coexistence of superconductivity and ferromagnetic order, which have generally been thought to be mutually exclusive. The above ruthenate systems are being studied using zero-field spin-echo nuclear magnetic resonance (NMR), magnetometry, x-ray diffraction, and x-ray absorption fine structure. (In collaboration with J. I. Budnick at UConn and P. Klamut at Northern Illinois Univ.)

Atomic, electronic, and magnetic structures of metals, alloys, and intermetallic compounds.

The experimental techniques of NMR and magnetization are used to study the properties of novel metals, alloys, and intermatallic compounds. In particular, investigations are being carried out on nanoscale metal-insulator systems, high Tc cuprate superconductors, and iron-based compounds. Information concerning the local atomic environment, electronic structure, magnetic moment behavior, and magnetic ordering is obtained on both a microscopic as well as a macroscopic level, and correlated with the physical properties. (In collaboration with J. I. Budnick and D. M. Pease at UConn, W. G. Clark at UCLA, D. P. Yang at Holy Cross, and Y. D. Zhang at Inframat Corp. Supported in part by subcontracts with Inframat Corp.)

Next Faculty

© 1998-2007 Department of Physics, University of Connecticut
This page was last updated by WWW administrator on October 28, 2007
Valid HTML 4.01! Valid CSS! Text only page version