Near-Surface Structural Phase Transition of SrTiO3 Studied with Zero-Field β-Detected Nuclear Spin Relaxation and Resonance
Abstract
We demonstrate that zero-field β-detected nuclear quadrupole resonance and spin relaxation of low energy 8Li can be used as a sensitive local probe of structural phase transitions near a surface. We find that the transition near the surface of a SrTiO3 single crystal occurs at Tc 150 K, i.e., 45 K higher than Tbulkc, and that the tetragonal domains formed below Tc are randomly oriented.
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