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Understanding the Superior Stability of Single-Molecule Magnets on an Oxide Film

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Title
Understanding the Superior Stability of Single-Molecule Magnets on an Oxide Film
Author(s)
Michał Studniarek; Christian Wäckerlin; Aparajita Singha; Romana Baltic; Katharina Diller; Fabio Donati; Stefano Rusponi; Harald Brune; Yanhua Lan; Svetlana Klyatskaya; Mario Ruben; Ari Paavo Seitsonen; Jan Dreiser
Publication Date
2019-11
Journal
ADVANCED SCIENCE, v.6, no.22, pp.1901736 -
Publisher
WILEY
Abstract
© 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimThe stability of magnetic information stored in surface adsorbed single-molecule magnets is of critical interest for applications in nanoscale data storage or quantum computing. The present study combines X-ray magnetic circular dichroism, density functional theory and magnetization dynamics calculations to gain deep insight into the substrate dependent relevant magnetization relaxation mechanisms. X-ray magnetic circular dichroism reveals the opening of a butterfly-shaped magnetic hysteresis of DyPc2 molecules on magnesium oxide and a closed loop on the bare silver substrate, while density functional theory shows that the molecules are only weakly adsorbed in both cases of magnesium oxide and silver. The enhanced magnetic stability of DyPc2 on the oxide film, in conjunction with previous experiments on the TbPc2 analogue, points to a general validity of the magnesium oxide induced stabilization effect. Magnetization dynamics calculations reveal that the enhanced magnetic stability of DyPc2 and TbPc2 on the oxide film is due to the suppression of two-phonon Raman relaxation processes. The results suggest that substrates with low phonon density of states are beneficial for the design of spintronics devices based on single-molecule magnets
URI
https://pr.ibs.re.kr/handle/8788114/6810
ISSN
2198-3844
Appears in Collections:
Center for Quantum Nanoscience(양자나노과학 연구단) > Journal Papers (저널 논문)
Files in This Item:
Fabio Donati_Understanding the Superior Stability of Single-Molecule Magnets on an Oxide Film_Studniarek_et_al-2019-Advanced_Science.pdfDownload

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