SPIN-LATTICE RELAXATION AND CONCENTRATION EFFECTS OF Cr3+ IN RUBY
红宝石Cr3+离子的自旋-晶格弛豫时间和浓度效应

The experimental technique and results from measuring spin-lattice relaxation times by the pulse saturation method at X band are described. Double frequency is used to synchronize the oscilloscope in order to measure T1 more precisely. The spin lattice relaxation times of Cr3+ in ruby have been measured for several different concentrations. It is concluded that T1 of various transitions are nearly the same, but become shorter apparently with increasing Cr3+ concentration.