Bałanda, Maria ; Tomkowicz, Zbigniew ; Haase, Wolfgang ; Rams, Michał (2011)
Single-chain magnet features in 1D [MnR₄TPP][TCNE] compounds.
In: Journal of Physics: Conference Series, 303 (1)
doi: 10.1088/1742-6596/303/1/012036
Artikel, Bibliographie
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Kurzbeschreibung (Abstract)
Molecular chains of antiferrimagnetically coupled MnIII-ion (S = 2) and TCNE (tetracyanoethylene) radical moments (s = ½) show different behaviour depending on group R substituted to TPP (tetraphenylporphyrin) and on the substitution site. The compound with R = F in Ortho position is a Single-Chain Magnet (SCM) with blocking temperature Tb = 6.6K, while that with R = F in Meta position shows both blocking (Tb = 5.4 K) and magnetic ordering transition (Tc = 10 K). For bulky groups R = OCnH2n+1, the magnetically ordered phase is observed (Tc ≈ 22 K), which does not however prevent slow relaxation at T <8 K. Magnetic hysteresis with coercive field Hc of 2 T at 2.3 K is like that of SCM. The frequency dependent AC susceptibility in the superimposed DC field reveals common features of all systems. The energy of intrachain ferromagnetic coupling between effective spin units 3/2, relevant at low temperatures, is determined for all compounds and the interchain dipolar coupling is estimated. It is concluded that slow relaxation is inherent for all quasi one-dimensional compounds and for the magnetically ordered ones shows up in the high enough magnetic field.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2011 |
| Autor(en): | Bałanda, Maria ; Tomkowicz, Zbigniew ; Haase, Wolfgang ; Rams, Michał |
| Art des Eintrags: | Bibliographie |
| Titel: | Single-chain magnet features in 1D [MnR₄TPP][TCNE] compounds |
| Sprache: | Englisch |
| Publikationsjahr: | 2011 |
| Ort: | Bristol |
| Verlag: | IOP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Physics: Conference Series |
| Jahrgang/Volume einer Zeitschrift: | 303 |
| (Heft-)Nummer: | 1 |
| Kollation: | 14 Seiten |
| DOI: | 10.1088/1742-6596/303/1/012036 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | Molecular chains of antiferrimagnetically coupled MnIII-ion (S = 2) and TCNE (tetracyanoethylene) radical moments (s = ½) show different behaviour depending on group R substituted to TPP (tetraphenylporphyrin) and on the substitution site. The compound with R = F in Ortho position is a Single-Chain Magnet (SCM) with blocking temperature Tb = 6.6K, while that with R = F in Meta position shows both blocking (Tb = 5.4 K) and magnetic ordering transition (Tc = 10 K). For bulky groups R = OCnH2n+1, the magnetically ordered phase is observed (Tc ≈ 22 K), which does not however prevent slow relaxation at T <8 K. Magnetic hysteresis with coercive field Hc of 2 T at 2.3 K is like that of SCM. The frequency dependent AC susceptibility in the superimposed DC field reveals common features of all systems. The energy of intrachain ferromagnetic coupling between effective spin units 3/2, relevant at low temperatures, is determined for all compounds and the interchain dipolar coupling is estimated. It is concluded that slow relaxation is inherent for all quasi one-dimensional compounds and for the magnetically ordered ones shows up in the high enough magnetic field. |
| Zusätzliche Informationen: | Joint European Magnetic Symposia – JEMS 2010 23–28 August 2010, Krakow, Poland |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Fachbereich(e)/-gebiet(e): | 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie |
| Hinterlegungsdatum: | 24 Jan 2024 07:32 |
| Letzte Änderung: | 24 Jan 2024 07:32 |
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Single-chain magnet features in 1D [MnR₄TPP][TCNE] compounds. (deposited 23 Jan 2024 10:07)
- Single-chain magnet features in 1D [MnR₄TPP][TCNE] compounds. (deposited 24 Jan 2024 07:32) [Gegenwärtig angezeigt]
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