19F nuclear spin relaxation and spin diffusion effects in the single ion magnet LiYF4:Ho3+
| Autor: | A. M. Tkachuk, Bernard Barbara, M. J. Graf, Alessandro Lascialfari, B. Z. Malkin, M. V. Vanyunin, J. Lago, Ferdinando Borsa |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Materials science
Nuclear Theory chemistry.chemical_element FOS: Physical sciences 02 engineering and technology 01 natural sciences 7. Clean energy Ion Magnetization Paramagnetism 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 010306 general physics Saturation (magnetic) Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Settore FIS/01 - Fisica Sperimentale 021001 nanoscience & nanotechnology Condensed Matter Physics Electronic Optical and Magnetic Materials Magnetic field Condensed Matter - Other Condensed Matter chemistry Spin diffusion Condensed Matter::Strongly Correlated Electrons 0210 nano-technology Holmium Single crystal Other Condensed Matter (cond-mat.other) |
| DOI: | 10.48550/arxiv.0808.2137 |
| Popis: | Temperature and magnetic field dependences of the 19F nuclear spin-lattice relaxation in a single crystal of LiYF4 doped with holmium are described by an approach based on a detailed consideration of the magnetic dipole-dipole interactions between nuclei and impurity paramagnetic ions and nuclear spin diffusion processes. The observed non-exponential long time recovery of the nuclear magnetization after saturation at intermediate temperatures is in agreement with predictions of the spin-diffusion theory in a case of the diffusion limited relaxation. At avoided level crossings in the spectrum of electron-nuclear states of the Ho3+ ion, rates of nuclear spin-lattice relaxation increase due to quasi-resonant energy exchange between nuclei and paramagnetic ions, in contrast to the predominant role played by electronic cross-relaxation processes in the low-frequency ac-susceptibility. Comment: 27 pages total, 5 figures, accepted for publication, Eur. Phys. J. B |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|