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  A four-coordinate cobalt(II) single-ion magnet with coercivity and a very high energy barrier

Rechkemmer, Y., Breitgoff, F. D., van der Meer, M., Atanasov, M., Hakl, M., Orlita, M., et al. (2016). A four-coordinate cobalt(II) single-ion magnet with coercivity and a very high energy barrier. Nature Communications, 7: 10467. doi:10.1038/ncomms10467.

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 Creators:
Rechkemmer, Yvonne1, Author
Breitgoff, Frauke D.1, Author
van der Meer, Margarethe2, Author
Atanasov, Mihail3, 4, Author              
Hakl, Michael5, Author
Orlita, Milan5, 6, Author
Neugebauer, Petr1, Author
Neese, Frank3, Author              
Sarkar, Biprajit2, Author
van Slageren, Joris1, Author
Affiliations:
1Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, Stuttgart, D-70569, Germany, ou_persistent22              
2Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, Berlin, D-14195, Germany, ou_persistent22              
3Research Department Neese, Max Planck Institute for Chemical Energy Conversion, Max Planck Society, ou_3023886              
4Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia, 1113, Bulgaria, ou_persistent22              
5Laboratoire national des champs magnétiques intenses, CNRS-UJF-UPS-INS, Grenoble, F-38042, France, ou_persistent22              
6Institute of Physics, Charles University in Prague, Prague, CZ-12116, Czech Republic, ou_persistent22              

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 Abstract: Single-molecule magnets display magnetic bistability of molecular origin, which may one day be exploited in magnetic data storage devices. Recently it was realised that increasing the magnetic moment of polynuclear molecules does not automatically lead to a substantial increase in magnetic bistability. Attention has thus increasingly focussed on ions with large magnetic anisotropies, especially lanthanides. In spite of large effective energy barriers towards relaxation of the magnetic moment, this has so far not led to a big increase in magnetic bistability. Here we present a comprehensive study of a mononuclear, tetrahedrally coordinated cobalt(II) single-molecule magnet, which has a very high effective energy barrier and displays pronounced magnetic bistability. The combined experimental-theoretical approach enables an in-depth understanding of the origin of these favourable properties, which are shown to arise from a strong ligand field in combination with axial distortion. Our findings allow formulation of clear design principles for improved materials.

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Language(s): eng - English
 Dates: 2015-08-032015-12-112016-02-17
 Publication Status: Published online
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1038/ncomms10467
 Degree: -

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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 7 Sequence Number: 10467 Start / End Page: - Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723