Exchange-biased quantum tunnelling in a supramolecular dimer of single-molecule magnets

Nature
Wolfgang WernsdorferGeorge Christou

Abstract

Various present and future specialized applications of magnets require monodisperse, small magnetic particles, and the discovery of molecules that can function as nanoscale magnets was an important development in this regard. These molecules act as single-domain magnetic particles that, below their blocking temperature, exhibit magnetization hysteresis, a classical property of macroscopic magnets. Such 'single-molecule magnets' (SMMs) straddle the interface between classical and quantum mechanical behaviour because they also display quantum tunnelling of magnetization and quantum phase interference. Quantum tunnelling of magnetization can be advantageous for some potential applications of SMMs, for example, in providing the quantum superposition of states required for quantum computing. However, it is a disadvantage in other applications, such as information storage, where it would lead to information loss. Thus it is important to both understand and control the quantum properties of SMMs. Here we report a supramolecular SMM dimer in which antiferromagnetic coupling between the two components results in quantum behaviour different from that of the individual SMMs. Our experimental observations and theoretical analysis suggest a...Continue Reading

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Citations

Dec 14, 2004·Chemistry : a European Journal·Hiroki OshioHidehiko Ishimoto
Apr 24, 2012·Inorganic Chemistry·Asamanjoy BhuniaGereon Niedner-Schatteburg
Jun 6, 2012·Inorganic Chemistry·Sarah PetitDominique Luneau
Jan 1, 2013·Inorganic Chemistry·Junjie LiuGuillem Aromí
Nov 19, 2012·Inorganic Chemistry·Kim R Dunbar
Jul 19, 2013·Inorganic Chemistry·Cai-Ming LiuDao-Ben Zhu
Mar 24, 2011·Journal of the American Chemical Society·Jérôme LongMuralee Murugesu
May 14, 2011·Journal of the American Chemical Society·Fatemah HabibMuralee Murugesu
Oct 11, 2011·Journal of the American Chemical Society·Zhenxing WangNaresh S Dalal
Dec 6, 2011·Journal of the American Chemical Society·Tu N NguyenGeorge Christou
Aug 21, 2013·Journal of the American Chemical Society·José Martínez-LilloJ Krzystek
Jun 21, 2013·Journal of the American Chemical Society·Elisabeth M FatilaKathryn E Preuss
Aug 24, 2013·Journal of the American Chemical Society·Rodica AbabeiRodolphe Clérac
Mar 12, 2009·Journal of the American Chemical Society·Francesca BranzoliMario Ruben
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Mar 17, 2005·Chemical Communications : Chem Comm·Laura ZobbiRoberta Sessoli
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Nov 26, 2008·Chemical Communications : Chem Comm·Ross InglisEuan K Brechin
Apr 1, 2009·Chemical Communications : Chem Comm·Leigh F JonesEuan K Brechin

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