Traditional Magnetism.- The Magnetization Process. Micromagnetism.- Magnetic Nondestructive Testing Techniques.- Uses of the Magneto-Optical Effect.- Magnetoelectric Materials.- Giant Magnetoresistance, Spin Valves.- Introduction to Spintronics.- Some Magnetic Recording Media Developments.- Concluding Remarks
About the Author: Dr. Stefanita is a physicist/materials scientist who received her Ph. D. degree in Physics (Magnetic Nondestructive Testing and Materials Characterization) from Queen's University, Kingston, Ontario, Canada in 1999. Her Ph.D. thesis was "Surface Magnetic Barkhausen Noise Response To Plastic Yield of Steel". Previously, she received her Diploma of Engineer in Physics (Technological Physics) from the University of Bucharest, Romania in 1989 with the thesis "Apparatus for Measuring Solar Radiation Using a Thin Film Transducer". Dr. Stefanita also has a 1984 Baccalaureate in Mathematics and Physics from the German School of Bucharest in Romania.
Dr. Stefanita has over 15 years collective experience in academia and industry with international exposure on 3 continents, and 5 countries. Her research projects in nanotechnology have covered self-assembled metallic and semiconductor nanowires or nanodots, spintronics, magnetotransport, Hall effect, and infrared absorption and transmission. Her other work in magnetism involved magnetic behavior of plastically deformed steel, microyielding phenomena, cold rolling effects on magnetic properties, and magnetic nondestructive testing techniques for detecting defects in steel components. She has also developed a prototype for a medical diagnostics apparatus based on a thin film interference filter. Dr. Stefanita's work in industry as a materials scientist covered areas of failure analysis, scanning electron microscopy, energy dispersive X- ray analysis, atomic emission spectroscopy and import of chemicals and raw materials. The university courses she taught include subjects in the fields of solid state devices, electromagnetics, and mechanics of deformables. Dr. Stefanita is a regular referee for nanotechnology papers, as well as a published author of a magnetics book, two book chapters, journal papers, conference publications, and internal reports.
Dr. Stefanita is a co-founder and Senior Partner with NanoDotTek based in the Boston area, Massachusetts, USA. This company is dedicated to promoting nanotechnology, and allied areas such as non-destructive testing (the "NDT" in NanoDotTek) for engineering systems. With respect to the latter Dr. Stefanita is presently engaged in developing a lossy dielectric with a prescribed fractional impedance. This is in furtherance of improving fractional order control systems and pulse shaping for wireless broadband communications. Dr. Stefanita is a licensed Professional Engineer in the Province of Alberta, Canada.
Dr. Min Namkung recieved his Ph.D in physics from the College of William and Mary in 1982 with his dissertation on the subject of magetic hyperfine field probed by the muon spin rotation method which demonstrated the uniaxial stress-induced magnetic domain alignment in bulk iron samples. In the same year he joined NASA Langley Research Center. For the following years, he estblished the magnetoelastic and magnetiacoustic nondestructive evaluation methods for the characterization of residual stress and temper embrittlment, respectively, in structural ferromagnets. Following the Aloha Ariline incident in 198, in which a Boeing 737 passenger aircraft lost a large portion of fuselage while cruising, Dr. Namkung was assiged to develop an electromagntic for the detection of cracks in aircraft bodies. Dr. Namkung and his team at NASA Langley Research Center developed a self-nulling eddy current technology that was capable of detecting fatigue cracks hidden under rivet headsthat holds the lap joints of aircraft. Dr. Namkung has been awarded with 14 US Patents on the subjects of mangetic and electromagnetic NDE methods, and he has published more than 100 papers in journals and conference proceedings. Since 2005, Dr. Namkung has been a member of NASA Goddard Space Flight Center with his main research focus on computational materials science, and UV-VIS and gamma-ray spectroscopy.
