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Power-law versus exponential relaxation of 29Si nucleus spins in Si:B crystals
- Source :
- Journal of Magnetism and Magnetic Materials. 400:145-148
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- The Si:B micro-crystals enriched with 29 Si isotope have been studied by high resolution nuclear magnetic resonance (NMR) in the 300–800 K temperature range. The recovery of nuclear magnetization saturated by radiofrequency impulses follows pure power-law kinetics at 300 K, while admixture of exponential relaxation takes place at 500 K. The power-law relaxation corresponds to direct electron–nuclear relaxation due to the inhomogeneous distribution of paramagnetic centers, while exponential kinetics corresponds to the nuclear spin diffusion mechanism. The inhomogeneous distribution of deformation defects is a most probable reason of the power-law kinetics of nuclear spin relaxation.
- Subjects :
- Materials science
Spins
Condensed matter physics
Diffusion
Nuclear Theory
Relaxation (NMR)
Spin–lattice relaxation
02 engineering and technology
Atmospheric temperature range
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Electronic, Optical and Magnetic Materials
Spin–spin relaxation
Paramagnetism
Magnetization
0103 physical sciences
010306 general physics
0210 nano-technology
Subjects
Details
- ISSN :
- 03048853
- Volume :
- 400
- Database :
- OpenAIRE
- Journal :
- Journal of Magnetism and Magnetic Materials
- Accession number :
- edsair.doi...........bb972b533ccc48d9c0e467fa04c40d1d