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28 March 2024 |
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Article overview
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19F nuclear spin relaxation and spin diffusion effects in the single ion magnet LiYF4:Ho3+ | B. Z. Malkin
; M. V. Vanyunin
; M. J. Graf
; J. Lago
; F. Borsa
; A. Lascialfari
; A. M. Tkachuk
; B. Barbara
; | Date: |
15 Aug 2008 | Abstract: | 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. | Source: | arXiv, 0808.2137 | Services: | Forum | Review | PDF | Favorites |
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