Properties of Mn2+ and Π-Electron Spin Systems Probed by 1H and 13C NMR in the Organic Conductor κ-(BETS)2Mn[N(CN)2]3
Properties of the spin systems of the localized 3d Mn2+ ions and the conduction π electrons in quasi-two-dimensional organic conductor κ-(BETS)2Mn[N(CN)2]3 were accessed using 1H and 13C NMR in order to find their relation to the metal-insulator transition which occurs at ∼23 K. The transition of th...
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doaj-b36380d476a64bcba18ff02d40d102282020-11-24T22:44:05ZengMDPI AGCrystals2073-43522012-04-012222423510.3390/cryst2020224Properties of Mn2+ and Π-Electron Spin Systems Probed by 1H and 13C NMR in the Organic Conductor κ-(BETS)2Mn[N(CN)2]3Eduard B. YagubskiiNataliya D. KushchSergey V. SimonovLeokadiya V. ZorinaMegumi KobayashiHiroshi M. YamamotoReizo KatoOleg M. VyaselevProperties of the spin systems of the localized 3d Mn2+ ions and the conduction π electrons in quasi-two-dimensional organic conductor κ-(BETS)2Mn[N(CN)2]3 were accessed using 1H and 13C NMR in order to find their relation to the metal-insulator transition which occurs at ∼23 K. The transition of the system into the insulating state is shown to be followed by localization of the π spins into a long-range ordered staggered structure of AF type. In contrast, the 3d Mn2+ electron spin moments form a disordered tilted structure, which may signify their trend to AF order, frustrated geometrically by the triangular arrangement of Mn in the anion layer. This result suggests that the MI transition in κ-(BETS)2Mn[N(CN)2]3 is not the consequence of the interactions within the Mn2+ spins but due to the interactions within the π-electron system itself. Vice versa, it is more likelythat the disordered tilted structure of the Mn2+ spins is induced by the ordered π-spins via the π-d interaction.http://www.mdpi.com/2073-4352/2/2/224organic metalspi-d interactionsspin orderantiferromagnetismmetal-insulator transitionNMR |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Eduard B. Yagubskii Nataliya D. Kushch Sergey V. Simonov Leokadiya V. Zorina Megumi Kobayashi Hiroshi M. Yamamoto Reizo Kato Oleg M. Vyaselev |
spellingShingle |
Eduard B. Yagubskii Nataliya D. Kushch Sergey V. Simonov Leokadiya V. Zorina Megumi Kobayashi Hiroshi M. Yamamoto Reizo Kato Oleg M. Vyaselev Properties of Mn2+ and Π-Electron Spin Systems Probed by 1H and 13C NMR in the Organic Conductor κ-(BETS)2Mn[N(CN)2]3 Crystals organic metals pi-d interactions spin order antiferromagnetism metal-insulator transition NMR |
author_facet |
Eduard B. Yagubskii Nataliya D. Kushch Sergey V. Simonov Leokadiya V. Zorina Megumi Kobayashi Hiroshi M. Yamamoto Reizo Kato Oleg M. Vyaselev |
author_sort |
Eduard B. Yagubskii |
title |
Properties of Mn2+ and Π-Electron Spin Systems Probed by 1H and 13C NMR in the Organic Conductor κ-(BETS)2Mn[N(CN)2]3 |
title_short |
Properties of Mn2+ and Π-Electron Spin Systems Probed by 1H and 13C NMR in the Organic Conductor κ-(BETS)2Mn[N(CN)2]3 |
title_full |
Properties of Mn2+ and Π-Electron Spin Systems Probed by 1H and 13C NMR in the Organic Conductor κ-(BETS)2Mn[N(CN)2]3 |
title_fullStr |
Properties of Mn2+ and Π-Electron Spin Systems Probed by 1H and 13C NMR in the Organic Conductor κ-(BETS)2Mn[N(CN)2]3 |
title_full_unstemmed |
Properties of Mn2+ and Π-Electron Spin Systems Probed by 1H and 13C NMR in the Organic Conductor κ-(BETS)2Mn[N(CN)2]3 |
title_sort |
properties of mn2+ and π-electron spin systems probed by 1h and 13c nmr in the organic conductor κ-(bets)2mn[n(cn)2]3 |
publisher |
MDPI AG |
series |
Crystals |
issn |
2073-4352 |
publishDate |
2012-04-01 |
description |
Properties of the spin systems of the localized 3d Mn2+ ions and the conduction π electrons in quasi-two-dimensional organic conductor κ-(BETS)2Mn[N(CN)2]3 were accessed using 1H and 13C NMR in order to find their relation to the metal-insulator transition which occurs at ∼23 K. The transition of the system into the insulating state is shown to be followed by localization of the π spins into a long-range ordered staggered structure of AF type. In contrast, the 3d Mn2+ electron spin moments form a disordered tilted structure, which may signify their trend to AF order, frustrated geometrically by the triangular arrangement of Mn in the anion layer. This result suggests that the MI transition in κ-(BETS)2Mn[N(CN)2]3 is not the consequence of the interactions within the Mn2+ spins but due to the interactions within the π-electron system itself. Vice versa, it is more likelythat the disordered tilted structure of the Mn2+ spins is induced by the ordered π-spins via the π-d interaction. |
topic |
organic metals pi-d interactions spin order antiferromagnetism metal-insulator transition NMR |
url |
http://www.mdpi.com/2073-4352/2/2/224 |
work_keys_str_mv |
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