Wednesday Colloquium: Dr. Srini Krishnamurthy (SRI International)
Title: Spin Precession Organic Magnetic Sensor
Abstract: Magnetic sensors are very useful in a number of DoD and commercial applications including—tracking submarines to rifles, identifying unexploded objects and underground facility, magnetic resonance imaging, low frequency communication through earth, water and ionosphere—to name a few. In this talk, I will:
give a short review of the existing sensors, their salient features, and their limitations, describe the physics and requirements of a sensor that exploits quantum mechanics for improved sensitivity ,
address the issues related to the choice of contacts and transport medium, briefly discuss the sources of noise,
describe the fabrication procedure, discuss the fabricated device structures, materials choice, predicted theoretical performance, and measured device results.
The measured sensor performance falls considerably below the predicted values. The issues and identified technical challenges will be discussed.
 Z.G. Yu, M.A. Berding, and S. Krishnamurthy, Physical Review B 71, 060408 (R) (2005)