title: Hyperfine-Interaction-Driven Suppression of Quantum Tunneling at Zero Field in a Holmium(III) Single-Ion Magnet.
abstract: An extremely rare non-Kramers holmium(III) single-ion magnet (SIM) is reported to be stabilized in the pentagonal-bipyramidal geometry by a phosphine oxide with a high energy barrier of 237(4) cm-1. The suppression of the quantum tunneling of magnetization (QTM) at zero field and the hyperfine structures originating from field-induced QTMs can be observed even from the field-dependent alternating-current magnetic susceptibility in addition to single-crystal hysteresis loops. These dramatic dynamics were attributed to the combination of the favorable crystal-field environment and the hyperfine interactions arising from165Ho (I=7/2) with a natural abundance of 100 %.
authors.affiliation: Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China.
authors.forename: Yan-Cong
authors.initials: YC
authors.lastname: Chen
authors.affiliation: Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China.
authors.forename: Jun-Liang
authors.identifier: 0000-0002-5811-6300
authors.initials: JL
authors.lastname: Liu
authors.affiliation: Institut Néel, CNRS &, Université Joseph Fournier, Grenoble Cedex 9, France.|Institute of Nanotechnology, Karlsruhe Institute of Technology, Germany.|Physikalisches Institut, Karlsruhe Institute of Technology, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Wernsdorfer
authors.affiliation: Theory of Nanomaterials Group and INPAC-Institute of Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Belgium.
authors.forename: Dan
authors.initials: D
authors.lastname: Liu
authors.affiliation: Theory of Nanomaterials Group and INPAC-Institute of Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Belgium.
authors.forename: Liviu F
authors.initials: LF
authors.lastname: Chibotaru
authors.affiliation: Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China.
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Chen
authors.affiliation: Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P.R. China.
authors.forename: Ming-Liang
authors.identifier: 0000-0003-4725-0798
authors.initials: ML
authors.lastname: Tong
keywords: holmium; hyperfine interactions; lanthanides; magnetic properties; single-molecule magnets