Abstract
The low-energy part of the copper spin-wave excitation spectrum in the undoped antiferromagnets Nd 2CuO 4 and Pr 2CuO 4 has been studied by inelastic neutron scattering. In Nd 2CuO 4, magnetic scattering observed around the (½½ Q) rod exhibits pronounced energy gaps for both the “in-plane” and “out-of-plane” spin fluctuations over the whole Brillouin zone. The two gaps appear to be dispersionless along the tetragonal axis direction and remarkably increase when temperature decreases. In Pr 2CuO 4, the spin-wave gaps are also observed with smaller energies at low temperatures.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
