Emeritus Profile

Portrait
Haruo Kojima
Emeritus
Member of the Graduate Faculty
Group: Condensed matter experiment
Phone: 848-445-8978, 848-445-9016 lab
Office: W120
Email: Kojima@physics.rutgers.edu
Homepage: http://www.physics.rutgers.edu/~kojima/

Research Overview:

Superfluid He-3, which occurs below 2.6 mK, has a rich variety of phenomena whose analogs can be found in superfluid He-4,nematic liquid crystals, antiferromagnets, and ferromagnets. We have been carrying out a number of experiments to measure magnetic, thermodynamic, and hydrodynamic properties of superfluidHe-3. Our most recent research has been with the superfluid He-3 A-1 phase in magnetic fields as high as 15 teals. A special nuclear demagnetization apparatus has been built to cool liquid He-3 down to 1.5 mK in such high magnetic fields. A unique hybrid form of second sound, called spin-entropy wave exists in A-1 phase. The velocity and attenuation of the spin-entropy are being measured to extract the superfluid fraction, the spin diffusivity, and the thermal conductivity. Under suitable conditions, the spin-entropy wave can be used to study liquid crystal-like anisotropy effects. Textural transitions induced by superfluid flows are being studied using the spin-entropy wave. Preliminary work on sonoluminescence in water is being carried out. Measurements spin-lattice relaxation time and susceptibility of a non-Fermi liquid system,CeCu_6-xAux are also being carried out using NQR and SQUID techniques.

News Item(s):
  • Professor Harry Kojima has been elected as Fellow of the APS