Pr Magnetic Order and Spin Dynamics in the Cuprates

J. W. Lynn ； N. Rosov ； S. N. Barilo ； L. Kurnevitch ； A. Zhokhov

《Chinese Journal of Physics》 38卷2S期 (2000/04) Pp. 286-294

並列摘要

Magnetic neutron scattering measurements are reviewed for PrBa2Cu3O6+x and compared to related materials that contain Pr. In these materials the magnetic rare earth ordering temperatures are typically an order-of-magnitude higher than for the other rare earths, indicating that exchange interactions dominate the energetics of the magnetic system. For the spin dynamics in Pr123, the strong f-electron hybridization produces non-Fermi liquid-like scattering, which appears to destroy any chance for superconductivity. This behavior contrasts strongly with the sharp crystal field excitations found for the heavy rare earths, as well as with the sharp levels found in other Pr systems.