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Confining single Er3+ ions in sub-3 nm NaYF4 nanoparticles to induce slow relaxation of the magnetisation

Author

Listed:
  • Diogo A. Gálico

    (University of Ottawa)

  • Emille M. Rodrigues

    (University of Ottawa)

  • Ilias Halimi

    (University of Ottawa)

  • Juho Toivola

    (Nanoscience Centre, University of Jyväskylä)

  • He Zhao

    (National University of Singapore)

  • Jiahui Xu

    (National University of Singapore)

  • Jani O. Moilanen

    (Nanoscience Centre, University of Jyväskylä)

  • Xiaogang Liu

    (National University of Singapore)

  • Eva Hemmer

    (University of Ottawa
    University of Ottawa)

  • Muralee Murugesu

    (University of Ottawa
    University of Ottawa)

Abstract

Molecular systems known as single-molecule magnets (SMMs) exhibit magnet-like behaviour of slow relaxation of the magnetisation and magnetic hysteresis and have potential application in high-density memory storage or quantum computing. Often, their intrinsic magnetic properties are plagued by low-energy molecular vibrations that lead to phonon-induced relaxation processes, however, there is no straightforward synthetic approach for molecular systems that would lead to a small amount of low-energy vibrations and low phonon density of states at the spin-resonance energies. In this work, we apply knowledge accumulated over the last decade in molecular magnetism to nanoparticles, incorporating Er3+ ions in an ultrasmall sub-3 nm diamagnetic NaYF4 nanoparticle (NP) and probing the slow relaxation dynamics intrinsic to the Er3+ ion. Furthermore, by increasing the doping concentration, we also investigate the role of intraparticle interactions within the NP. The knowledge gained from this study is anticipated to enable better design of magnetically high-performance molecular and bulk magnets for a wide variety of applications, such as molecular electronics.

Suggested Citation

  • Diogo A. Gálico & Emille M. Rodrigues & Ilias Halimi & Juho Toivola & He Zhao & Jiahui Xu & Jani O. Moilanen & Xiaogang Liu & Eva Hemmer & Muralee Murugesu, 2024. "Confining single Er3+ ions in sub-3 nm NaYF4 nanoparticles to induce slow relaxation of the magnetisation," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47682-x
    DOI: 10.1038/s41467-024-47682-x
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    References listed on IDEAS

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    1. Feng Wang & Yu Han & Chin Seong Lim & Yunhao Lu & Juan Wang & Jun Xu & Hongyu Chen & Chun Zhang & Minghui Hong & Xiaogang Liu, 2010. "Simultaneous phase and size control of upconversion nanocrystals through lanthanide doping," Nature, Nature, vol. 463(7284), pages 1061-1065, February.
    2. Alessandro Lunghi & Federico Totti & Roberta Sessoli & Stefano Sanvito, 2017. "The role of anharmonic phonons in under-barrier spin relaxation of single molecule magnets," Nature Communications, Nature, vol. 8(1), pages 1-7, April.
    3. Conrad A. P. Goodwin & Fabrizio Ortu & Daniel Reta & Nicholas F. Chilton & David P. Mills, 2017. "Molecular magnetic hysteresis at 60 kelvin in dysprosocenium," Nature, Nature, vol. 548(7668), pages 439-442, August.
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