Abstract
The magnetic excitation spectrum of a YBa2Cu3O7 crystal containing 0.5% of nonmagnetic (Zn) impurities has been determined by inelastic neutron scattering. Whereas in the pure system a sharp resonance peak at E≃40meV is observed exclusively below the superconducting transition temperature Tcthe magnetic response in the Zn-substituted system is broadened significantly and vanishes at a temperature much higher than Tc. The energy-integrated spectral weight observed near q=(π,π) increases with Zn substitution, and only about half of the spectral weight is removed at Tc.
Original language | English (US) |
---|---|
Pages (from-to) | 1939-1942 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 82 |
Issue number | 9 |
DOIs | |
State | Published - 1999 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)