105Pd NMR and NQR study of the cubic heavy fermion system Ce3Pd20Si6

Scientific paper - Other

• Author: Ivan Jakovac; MBZ: 372514
• Author: Mladen Horvatić; MBZ: 112333
• Author: Eike Schwier
• Author: Andrey Prokofiev
• Author: Silke Paschen
• Author: Hiroyuki Mitamura
• Author: T Sakakibara
• Author: Mihael S. Grbić
• Author's institution: University of Zagreb; Faculty of Science
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

We report 105Pd NMR and NQR measurements on a single crystal of Ce3Pd20Si6, where antiferroquadrupolar and antiferromagnetic orders develop at low temperature. From the analysis of NQR and NMR spectra, we have determined the electric eld gradient (EFG) tensors and the anisotropic Knight shift (K) components for both inequivalent Pd sites - Pd(32f) and Pd(48h). The observed EFG values are in excellent agreement with our state-of-the-art DFT calculations. The principal values of the quadrupolar coupling are (20.37 +/- 0.02) MHz and (5.45 +/- 0.02) MHz, for the Pd(32f) and Pd(48h) site, respectively, which is large compared to the Larmor frequency de ned by the gyromagnetic constant gamma = 1.94838 MHz/T for 105Pd. Therefore, the complete knowledge of K and the EFG tensors is crucial to establish the correspondence between NMR spectra and crystallographic sites, which is needed for a complete analysis of the magnetic structure, static spin susceptibility, and the spin-lattice relaxation rate data and a better understanding of the groundstate of Ce3Pd20Si6.

• Keywords (english): NMR; NQR; heavy fermion; DFT
• Language: english
• Publication type: Scientific paper - Other
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Journal of Physics: Condensed Matter
• Numbering: vol. 32, 245601
• p-ISSN: 0953-8984
• e-ISSN: 1361-648X
• DOI: https://doi.org/10.1088/1361-648X/ab70c4
• URN:NBN: urn:nbn:hr:217:477909
• Publication: 2020
• Project: Number: IP-2018-01-2970; Title (croatian): Mikroskopska istraživanja induciranih faza u jako koreliranim elektronskim sustavima; Acronym: MicroS; Leader: Miroslav Požek; Jurisdiction: Croatia; Funding stream: IP
• Document URL: https://iopscience.iop.org/article/10.1088/1361-648X/ab70c4
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2020 The Author(s). Published by IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 25 November 2019, revised 11 January 2020. Accepted for publication 28 January 2020. Published 19 March 2020.
• Created on: 2020-08-31 20:23:38