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Abstract
A number of new magnetoelectric effects in crystals with tunneling paramagnetic centers involving the enhancement of the magnetization by an electric field are discussed. The experiments are performed for [AlO4]0 and Ge3+ (Na) centers on quartz by the EPR technique. Experiments show that the tunneling paramagnetic centers in crystals can be cooled in a steady-state fashion below the lattice temperature by means of low frequency, nonresonant external electric fields, and that the rate of spin-lattice relaxation for the tunneling centers can be controlled by electric fields.