John Rayne-Dept of Physics - Carnegie Mellon University

John Rayne

Emeritus Professor, Physics

Office: Wean Hall 7410
Phone: 412-268-2760
Fax: 412-681-0648

Research

Experimental research covers a wide class of materials, ranging from organometallic polymers to superconducting alloys. Particular emphasis is being placed on studies of linear chain antiferromagnets, such as CsNiCl3, to elucidate the nature of magnon-phonon interactions in these compounds. A number of different techniques are being used in this work, including ultrasonic attenuation and velocity measurements, thermal expansion and magnetostriction studies as well as Brillouin scattering experiments.

Another active area of research pertains to interfacial reactions in soldered joints. Currently, measurements are being made in the lead-tin system using the superconducting properties of the resulting alloy phases formed at the interface to monitor the reaction kinetics. These data are being supplemented by synchrotron x-ray, Auger and optical experiments.

Selected Publications

  • G. K. White and J.A. Rayne, Low Temperature Thermal Expansion of CuAl2, Cryogenics 32, 412 (1992).
  • Z. Tun, W. J. L. Buyers, A. Harrison, and J. A. Rayne, Observation of the Haldane Gap in RbNiCl3, Phys. Rev. B. 43, 13331 (1991).
  • S. J. Collocott and J. A. Rayne, Electronic Specific Heat of Gamma Phase Copper-Cadmium Alloys, Proceedings of the 18th International Conference on Low Temperature Physics, Kyoto, (1987).
  • S. J. Collocott and J. A. Rayne, Low Temperature Heat Capacity of Linear-Chain Magnetic Compounds CsNiCL3, RbNiCl3, and CoCuCl3, J. Appl. Phys 61, 4044 (1987).
  • S. A. Lee, H. E. Jackson and J. A. Rayne, Spin-Phonon Interactions Near the One Dimensional Antiferromagnetic Ordering in CsNiCl3, Solid State Communications 55, 771 (1985).
  • K. R. Mountfield and J. A. Rayne, Low Temperature Heat Capacity of Copper-Aluminum Alloys, Proc. of the LT17, Stuttgart, Germany, June 1984, U. Eckern, A. Schmid, W. Weber, H. Wuhl, eds., North-Holland Publishing Co., p. 1387.
  • J. A. Rayne, J. G. Collins and G. K. White, Low Temperature Magnetostriction in CsNiCl3 and RbNiCl3, J. Appl. Phys. 55, 2404 (1984).
  • K. R. Mountfield and J. A. Rayne, Electronic Specific Heat of Gamma Phase Copper-Aluminum Alloys, Solid State Communications 49, 1055 (1984).