1. a Microelectronics Research Laboratories, Department of Electrical and Computer Engineering, University of Colorado at, Colorado Springs
2. b Microelectronics Research Laboratories, Department of Electrical and Computer Engineering, University of Colorado at, Colorado Springs,Department of Physics, University of Colorado at, Colorado Springs
3. c Microelectronics Research Laboratories, Department of Electrical and Computer Engineering, University of Colorado at, Colorado Springs,Ramtron Corporation, Colorado Springs, CO