Exchange coupling in a frustrated trimetric molecular magnet reversed by a 1D nano-confinement

0517214 - ÚFCH JH 2020 RIV GB eng J - Journal Article
Domanov, O. - Weschke, E. - Saito, T. - Peterlik, H. - Pichler, T. - Eisterer, M. - Shiozawa, Hidetsugu
Exchange coupling in a frustrated trimetric molecular magnet reversed by a 1D nano-confinement.
Nanoscale. Roč. 11, č. 22 (2019), s. 10615-10621. ISSN 2040-3364. E-ISSN 2040-3372
R&D Projects: GA ČR(CZ) GA19-15217S; GA MŠMT LL1301
Institutional support: RVO:61388955
Keywords : ray circular-dichroism * carbon nanotubes * dependent growth * crystal
OECD category: Physical chemistry
Impact factor: 6.895, year: 2019
Method of publishing: Open access

Single-molecule magnets exhibit magnetic ordering due to exchange coupling between localized spin components that makes them primary candidates as nanometric spintronic elements. Here we manipulate exchange interactions within a single-molecule magnet by nanometric structural confinement, exemplified with single-wall carbon nanotubes that encapsulate trimetric nickel(II) acetylacetonate hosting three frustrated spins. It is revealed from bulk and Ni 3d orbital magnetic susceptibility measurements that the carbon tubular confinement allows a unique one-dimensional arrangement of the trimer in which the nearest-neighbour exchange is reversed from ferromagnetic to antiferromagnetic, resulting in quenched frustration as well as the Pauli paramagnetism is enhanced. The exchange reversal and enhanced spin delocalisation demonstrate the means of mechanically and electrically manipulating molecular magnetism at the nanoscale for nano-mechatronics and spintronics.
Permanent Link: http://hdl.handle.net/11104/0302495