Near-Surface Structural Phase Transition of SrTiO3 Studied with Zero-Field β-Detected Nuclear Spin Relaxation and Resonance
Z. Salman, R. F. Kiefl, K. H. Chow, M. D. Hossain, T. A. Keeler, S. R. Kreitzman, C. D. P. Levy, R. I. Miller, T. J. Parolin, M. R. Pearson, H. Saadaoui, J. D. Schultz, M. Smadella, D. Wang, W. A. MacFarlane
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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