2008/04/30 by Kentaro Kitagawa, K. Kitagawa, R. Higashinaka +4 · 3 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Nuclear materials and radiation effects #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.77.214403
published as Phys. Rev. B 77, 214403 (2008) · 8 pages, 6 figures, 1 table, accepted for publication in Phys. Rev. B
arxiv created 2008/05/10 · openalex publication_date 2008/06/03 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We have performed nuclear quadrupole resonance (NQR) experiments on 47Ti nuclei in Dy2Ti2O7 in the temperature range of 70--300 K in order to investigate the dynamics of 4f electrons with strong Ising anisotropy. A significant change in 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 were 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.