High-temperature spin relaxation process in Dy$_2$Ti$_2$O$_7$ probed by $^{47}$Ti-NQR

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dc.creatorKitagawa, K.
dc.creatorHigashinaka, R.
dc.creatorIshida, K.
dc.creatorMaeno, Y.
dc.creatorTakigawa, M.
dc.date2008-04-09
dc.date2008-05-10
dc.date.accessioned2026-07-07T09:42:20Z
dc.date.available2026-07-07T09:42:20Z
dc.descriptionWe have performed nuclear quadrupole resonance (NQR) experiments on $^{47}$Ti nuclei in Dy$_2$Ti$_2$O$_7$ in the temperature range 70 -- 300 K in order to investigate the dynamics of $4f$ electrons with strong Ising anisotropy. A significant change of the NQR frequency with temperature was attributed to the variation of the quadrupole moment of Dy $4f$ electrons. A quantitative account was given by the mean field analysis of the quadrupole-quadrupole (Q-Q) interaction in the presence of the crystalline-electric-field splitting. The magnitude and the temperature dependence of the nuclear spin-lattice relaxation rate was analyzed, including both the spin-spin and the Q-Q interactions. The results indicate that these two types of interaction contribute almost equally to the fluctuation of Dy magnetic moments.
dc.description8 pages, 6 figures, 1 table, accepted for publication in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/0804.1413
dc.identifierhttp://arxiv.org/abs/0804.1413
dc.identifierPhys. Rev. B 77, 214403 (2008)
dc.identifierdoi:10.1103/PhysRevB.77.214403
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/162148
dc.subjectStrongly Correlated Electrons
dc.titleHigh-temperature spin relaxation process in Dy$_2$Ti$_2$O$_7$ probed by $^{47}$Ti-NQR
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