Single crystal 27Al-NMR study of the cubic Γ3 ground doublet system PrTi2Al20

TMU International Symposium on "New Quantum Phases Emerging from Novel Crystal Structure"

Taniguchi, T.^1 ; Yoshida, M.^1 ; Takeda, H.^1 ; Takigawa, M.^1 ; Tsujimoto, M.^1 ; Sakai, A.^1 ; Matsumoto, Y.^1 ; Nakatsuji, S.^1

Institute for Solid States Physics, University of Tokyo, Kashiwa

277-8581, Japan^1

关键词: 27Al NMR;    Crystalline electric fields;    Dipolar couplings;    Electric field gradient tensors;    Ground doublet;    Hyperfine coupling tensors;    Knight shifts;    NMR spectrum;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/683/1/012016/pdf
DOI  :  10.1088/1742-6596/683/1/012016

来源: IOP

【 摘 要 】

We report results of27Al-NMR measurements on a single crystal of PrTi2Al20, in which the ground state of Pr3+ions in the crystalline electric field is the nonmagneitc Γ3doublet. From the analysis of NMR spectra with the magnetic field applied precisely along the 111 and 100 directions, we determined the electric field gradient tensors for all three inequivalent Al sites (Al(1) ∼ Al(3) sites) and the anisotropic Knight shifts for the Al(3) sites. The hyperfine coupling tensor at the Al(3) sites is strongly anisotropic and much larger than the classical dipolar coupling, indicating importance of the anisotropic hybridization between the conduction and electron states.