Confining single Er3+ ions in sub-3 nm NaYF4 nanoparticles to induce slow relaxation of the magnetisation
Gálico, D. A., Rodrigues, E. M., Halimi, I., Toivola, J., Zhao, H., Xu, J., Moilanen, J. O., Liu, X., Hemmer, E., & Murugesu, M. (2024). Confining single Er3+ ions in sub-3 nm NaYF4 nanoparticles to induce slow relaxation of the magnetisation. Nature Communications, 15, Article 3498. https://doi.org/10.1038/s41467-024-47682-x
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Nature CommunicationsAuthors
Zhao, He |
Date
2024Copyright
© 2024 the Authors
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.
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2041-1723Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/213396381
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Research Council of FinlandFunding program(s)
Academy Research Fellow, AoF; Research costs of Academy Research Fellow, AoF; Academy Project, AoFAdditional information about funding
D.A.G. and M.M. thank the University of Ottawa, the CFI, the Natural Sciences and Engineering Research Council of Canada for financial support of this work. E.H., E.M.R. and I.H. gratefully acknowledge the financial support provided by the University of Ottawa and the Natural Sciences and Engineering Research Council of Canada (NSERC, RGPIN2016-04830). J.T. and J.O.M. acknowledge the Research council of Finland (projects 315829, 345484, and 338733) for the financial support, and Prof. Heikki M. Tuononen (University of Jyväskylä) for providing computational resources for the project.

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