TechNewsWorld Talkback

Re: Physicist Ian Appelbaum Puts New Spin on Semiconductors
Posted by: Jack M. Germain 2008-11-07 11:41:53

See Full Story

University of Delaware's Dr. Ian Appelbaum is looking to "spin" his research on the magnetic properties of electrons to get more electronic enhancements from semiconductors. Appelbaum's research is now funded in part with a nearly half-million dollar grant from the U.S. Department of Defense Experimental Program to Stimulate Competitive Research. Since the Fall of 2004, he has headed a research team at the University of Delaware. The spintronics phsyicist conceived, developed, and experimentally demonstrated a mechanism for hot electron injection luminescence.

Exploring the Magnetic Resistance
Posted by: spintronics 2008-11-07 18:26:43 In reply to: Jack M. Germain

An electron has electric and magnetic field in right angle regardless of any kind of its motions and act as a tiny bar magnet with a negative charge. When electrons are flowing through a conductor, the electric field of each of the electrons will be directed to its nearest and strongest positive charge. In the collective effect, the electric fields of the whole of the electrons will be aligned to the direction of the current. Since the electric and magnetic fields are in right angles, the flow of the electrons creates a magnetic field that is perpendicular to the current. When the electric field of an electron and a positive charge come face-to-face, the “pull” between them will be maximum and the electron feels the lowest resistance (up state) in the conductor. But if the electron rotates, the pull between them decreases proportionally with the angle of rotation. By turning 90* angle, the electron feels the highest resistance (down state). By applying an external magnetic field, we can rotate the electron from 0* to 90* angles and can create the equal number of different resistance combinations.
Reference
Joseph George’s article published on the Internet
http://physics-edu.org/new_developments_in_theoretical_physics.pdf