JINSHAN ZHANG

I am currently a PhD student in Prof. Hans M. Bozler's Ultrolow Temperature Research Group in University of Southern California and expected to graduate in May, 2006.

My research is to measure the two-dimensional magnetism of ³He on GTA Grafoil and HOPG ZYX graphite substrate, a model system for the study of two-dimensional magnetism. We applied SQUID Nuclear Magnetic Resonance (NMR) technique for the very low frequency NMR needed in this experiment. Pulsed and CW NMR are performed on two-dimensional ³He films on both Grafoil and ZYX graphite substrates at very low applied field (<15 Gauss) and very low temperatures (0.3 mK to 20 mK). Evidence were found for a finite temperature ferromagnetic ordering at zero applied field. The ordering of ³He films magnetic system is proved intrinsic due to long ranged dipolar interaction, not due to the substrate finite size effect.