High Blocking Temperature of Magnetization and Giant Coercivity in the Azafullerene Tb(2)@C(79)N with a Single‐Electron Terbium–Terbium Bond

The azafullerene Tb(2)@C(79)N is found to be a single‐molecule magnet with a high 100‐s blocking temperature of magnetization of 24 K and large coercivity. Tb magnetic moments with an easy‐axis single‐ion magnetic anisotropy are strongly coupled by the unpaired spin of the single‐electron Tb−Tb bond...

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Autores principales: Velkos, Georgios, Krylov, Denis S., Kirkpatrick, Kyle, Spree, Lukas, Dubrovin, Vasilii, Büchner, Bernd, Avdoshenko, Stanislav M., Bezmelnitsyn, Valeriy, Davis, Sean, Faust, Paul, Duchamp, James, Dorn, Harry C., Popov, Alexey A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2019
Materias:
Communications
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6519270/
https://www.ncbi.nlm.nih.gov/pubmed/30786125
http://dx.doi.org/10.1002/anie.201900943
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author Velkos, Georgios
Krylov, Denis S.
Kirkpatrick, Kyle
Spree, Lukas
Dubrovin, Vasilii
Büchner, Bernd
Avdoshenko, Stanislav M.
Bezmelnitsyn, Valeriy
Davis, Sean
Faust, Paul
Duchamp, James
Dorn, Harry C.
Popov, Alexey A.
author_facet Velkos, Georgios
Krylov, Denis S.
Kirkpatrick, Kyle
Spree, Lukas
Dubrovin, Vasilii
Büchner, Bernd
Avdoshenko, Stanislav M.
Bezmelnitsyn, Valeriy
Davis, Sean
Faust, Paul
Duchamp, James
Dorn, Harry C.
Popov, Alexey A.
author_sort Velkos, Georgios
collection PubMed
description The azafullerene Tb(2)@C(79)N is found to be a single‐molecule magnet with a high 100‐s blocking temperature of magnetization of 24 K and large coercivity. Tb magnetic moments with an easy‐axis single‐ion magnetic anisotropy are strongly coupled by the unpaired spin of the single‐electron Tb−Tb bond. Relaxation of magnetization in Tb(2)@C(79)N below 15 K proceeds via quantum tunneling of magnetization with the characteristic time τ (QTM)=16 462±1230 s. At higher temperature, relaxation follows the Orbach mechanism with a barrier of 757±4 K, corresponding to the excited states, in which one of the Tb spins is flipped.
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spelling pubmed-65192702019-05-23 High Blocking Temperature of Magnetization and Giant Coercivity in the Azafullerene Tb(2)@C(79)N with a Single‐Electron Terbium–Terbium Bond Velkos, Georgios Krylov, Denis S. Kirkpatrick, Kyle Spree, Lukas Dubrovin, Vasilii Büchner, Bernd Avdoshenko, Stanislav M. Bezmelnitsyn, Valeriy Davis, Sean Faust, Paul Duchamp, James Dorn, Harry C. Popov, Alexey A. Angew Chem Int Ed Engl Communications The azafullerene Tb(2)@C(79)N is found to be a single‐molecule magnet with a high 100‐s blocking temperature of magnetization of 24 K and large coercivity. Tb magnetic moments with an easy‐axis single‐ion magnetic anisotropy are strongly coupled by the unpaired spin of the single‐electron Tb−Tb bond. Relaxation of magnetization in Tb(2)@C(79)N below 15 K proceeds via quantum tunneling of magnetization with the characteristic time τ (QTM)=16 462±1230 s. At higher temperature, relaxation follows the Orbach mechanism with a barrier of 757±4 K, corresponding to the excited states, in which one of the Tb spins is flipped. John Wiley and Sons Inc. 2019-03-27 2019-04-23 /pmc/articles/PMC6519270/ /pubmed/30786125 http://dx.doi.org/10.1002/anie.201900943 Text en © 2019 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Communications
Velkos, Georgios
Krylov, Denis S.
Kirkpatrick, Kyle
Spree, Lukas
Dubrovin, Vasilii
Büchner, Bernd
Avdoshenko, Stanislav M.
Bezmelnitsyn, Valeriy
Davis, Sean
Faust, Paul
Duchamp, James
Dorn, Harry C.
Popov, Alexey A.
High Blocking Temperature of Magnetization and Giant Coercivity in the Azafullerene Tb(2)@C(79)N with a Single‐Electron Terbium–Terbium Bond
title High Blocking Temperature of Magnetization and Giant Coercivity in the Azafullerene Tb(2)@C(79)N with a Single‐Electron Terbium–Terbium Bond
title_full High Blocking Temperature of Magnetization and Giant Coercivity in the Azafullerene Tb(2)@C(79)N with a Single‐Electron Terbium–Terbium Bond
title_fullStr High Blocking Temperature of Magnetization and Giant Coercivity in the Azafullerene Tb(2)@C(79)N with a Single‐Electron Terbium–Terbium Bond
title_full_unstemmed High Blocking Temperature of Magnetization and Giant Coercivity in the Azafullerene Tb(2)@C(79)N with a Single‐Electron Terbium–Terbium Bond
title_short High Blocking Temperature of Magnetization and Giant Coercivity in the Azafullerene Tb(2)@C(79)N with a Single‐Electron Terbium–Terbium Bond
title_sort high blocking temperature of magnetization and giant coercivity in the azafullerene tb(2)@c(79)n with a single‐electron terbium–terbium bond
topic Communications
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6519270/
https://www.ncbi.nlm.nih.gov/pubmed/30786125
http://dx.doi.org/10.1002/anie.201900943
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