Abstract
Relaxation rates of the paramagnetic rare-earth ions Nd, Sm, and Er in ethylsulfate crystals have been measured as a function of magnetic field from 0-13 kOe at temperatures of 1.4 and 2\ifmmode^\circ\else\textdegree\fi{}K using optical methods of detection. Nonequilibrium population differences were obtained by the rapid change of the magnetic field in a superconducting solenoid. Spin-memory measurements of the spin-lattice relaxation rate near zero field were possible for Nd and Sm ions. For crystals having a paramagnetic ion concentration greater than 3 at.% the relaxation behavior in the high-field region is affected by the phonon bottleneck. Theories appropriate to the prediction of the field dependence of spin-lattice relaxation rates, including the low-field and phonon-bottlenecked cases, are reviewed and used to interpret the data. Anomalous low-field rates, and some features of the optical methods of measurement are discussed.
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.
