Jump to main content
Jump to site search

Issue 8, 2016
Previous Article Next Article

An air-stable Dy(III) single-ion magnet with high anisotropy barrier and blocking temperature

Author affiliations

Abstract

Herein we report air-stable Dy(III) and Er(III) single-ion magnets (SIMs) with pseudo-D5h symmetry, synthesized from a sterically encumbered phosphonamide, tBuPO(NHiPr)2, where the Dy(III)-SIM exhibits a magnetization blocking (TB) up to 12 K, defined from the maxima of the zero-field cooled magnetization curve, with an anisotropy barrier (Ueff) as high as 735.4 K. The Dy(III)-SIM exhibits a magnetic hysteresis up to 12 K (30 K) with a large coercivity of ∼0.9 T (∼1.5 T) at a sweep rate of ∼0.0018 T s−1 (0.02 T s−1). These high values combined with persistent stability under ambient conditions, render this system as one of the best-characterized SIMs. Ab initio calculations have been used to establish the connection between the higher-order symmetry of the molecule and the quenching of quantum tunnelling of magnetization (QTM) effects. The relaxation of magnetization is observed via the second excited Kramers doublet owing to pseudo-high-order symmetry, which quenches the QTM. This study highlights fine-tuning of symmetry around the lanthanide ion to obtain new-generation SIMs and offers further scope for pushing the limits of Ueff and TB using this approach.

Graphical abstract: An air-stable Dy(iii) single-ion magnet with high anisotropy barrier and blocking temperature

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 20 Jan 2016, accepted on 12 Apr 2016 and first published on 13 Apr 2016


Article type: Edge Article
DOI: 10.1039/C6SC00279J
Citation: Chem. Sci., 2016,7, 5181-5191
  • Open access: Creative Commons BY license
  •   Request permissions

    An air-stable Dy(III) single-ion magnet with high anisotropy barrier and blocking temperature

    S. K. Gupta, T. Rajeshkumar, G. Rajaraman and R. Murugavel, Chem. Sci., 2016, 7, 5181
    DOI: 10.1039/C6SC00279J

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author