Superconductivity at high temperatures

Magnetic interactions could cause certain materials to conduct electricity without loss of power. This happens at higher temperatures than with state of the art superconductors like lead.

Spin waves can be measured with neutrons.
Picture: Max Planck Institute for Solid State Research.

Scientists from the Max Planck Institute for Solid State Research have contributed to these findings with neutron measurements at the FRM II. They examined an iron arsenide at the three axis spectrometers PUMA and PANDA. The results were published online at Nature Physics.

Original publication:

Normal-state spin dynamics and temperature-dependent spin-resonance energy in optimally doped BaFe1.85Co0.15As2

D.S. Inosov, J.T. Park, P. Bourges, D.L. Sun, Y. Sidis, A. Schneidewind, K. Hradil, D. Haug, C.T. Lin, B. Keimer and V. Hinkov;

Nature Physics, Letters (2009)

doi:10.1038/nphys1483