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Nuclear-spin relaxation of $^{207}$Pb in ferroelectric powders
- Source :
- Phys. Rev. A 77, 022102 (2008)
- Publication Year :
- 2007
-
Abstract
- Motivated by a recent proposal by O. P. Sushkov and co-workers to search for a P,T-violating Schiff moment of the $^{207}$Pb nucleus in a ferroelectric solid, we have carried out a high-field nuclear magnetic resonance study of the longitudinal and transverse spin relaxation of the lead nuclei from room temperature down to 10 K for powder samples of lead titanate (PT), lead zirconium titanate (PZT), and a PT monocrystal. For all powder samples and independently of temperature, transverse relaxation times were found to be $T_2\approx 1.5 $ms, while the longitudinal relaxation times exhibited a temperature dependence, with $T_1$ of over an hour at the lowest temperatures, decreasing to $T_1\approx 7 $s at room temperature. At high temperatures, the observed behavior is consistent with a two-phonon Raman process, while in the low temperature limit, the relaxation appears to be dominated by a single-phonon (direct) process involving magnetic impurities. This is the first study of temperature-dependent nuclear-spin relaxation in PT and PZT ferroelectrics at such low temperatures. We discuss the implications of the results for the Schiff-moment search.<br />Comment: 6 pages, 4 figures
- Subjects :
- Condensed Matter - Other Condensed Matter
Physics - Atomic Physics
Quantum Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. A 77, 022102 (2008)
- Publication Type :
- Report
- Accession number :
- edsarx.0711.1392
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevA.77.022102