Abstract
We present a study of the spin-wave excitations of Nd in Nd 2− x Ce x CuO 4 ( x = 0, 0.09, 0.15, 0.18) by inelastic neutron scattering. Upon Ce-doping one observes a softening of the spin-wave branches. This is mainly explained by the decrease of the CuNd exchange field at the Nd site, while the NdNd exchange interactions remain almost unchanged. Consequently a high density of states of spin-wave excitations at low energies is created. The resulting calculated specific-heat shows a large γ = C/ T-value at low temperatures, which indicates that the novel heavy-fermion behavior in these compounds is mainly due to magnetic correlations of the Nd ions.
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.
