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
Article, Bibliographie
This is the latest version of this item.
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2011 |
| Creators: | Bałanda, Maria ; Tomkowicz, Zbigniew ; Haase, Wolfgang ; Rams, Michał |
| Type of entry: | Bibliographie |
| Title: | Single-chain magnet features in 1D [MnR₄TPP][TCNE] compounds |
| Language: | English |
| Date: | 2011 |
| Place of Publication: | Bristol |
| Publisher: | IOP Publishing |
| Journal or Publication Title: | Journal of Physics: Conference Series |
| Volume of the journal: | 303 |
| Issue Number: | 1 |
| Collation: | 14 Seiten |
| DOI: | 10.1088/1742-6596/303/1/012036 |
| Corresponding Links: | |
| 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. |
| Additional Information: | Joint European Magnetic Symposia – JEMS 2010 23–28 August 2010, Krakow, Poland |
| Classification DDC: | 500 Science and mathematics > 530 Physics 500 Science and mathematics > 540 Chemistry |
| Divisions: | 07 Department of Chemistry 07 Department of Chemistry > Eduard Zintl-Institut > Physical Chemistry |
| Date Deposited: | 24 Jan 2024 07:32 |
| Last Modified: | 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) [Currently Displayed]
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