Study of anisotropic spin dynamics in pristine trans-polyacetylene by means of 2 mm EPR spectroscopy
| Autor: | G. I. Kozub, V.I. Krinichnyi, L. I. Tkachenko, A.E. Pelekh |
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| Rok vydání: | 1992 |
| Předmět: |
Condensed matter physics
Chemistry Mechanical Engineering Metals and Alloys Atmospheric temperature range Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Magnetic field Paramagnetism Polyacetylene chemistry.chemical_compound Mechanics of Materials law Materials Chemistry Spin diffusion Condensed Matter::Strongly Correlated Electrons Anisotropy Electron paramagnetic resonance Saturation (magnetic) |
| Zdroj: | Synthetic Metals. 46:13-22 |
| ISSN: | 0379-6779 |
| DOI: | 10.1016/0379-6779(92)90315-a |
| Popis: | Spin-lattice and spin-spin relaxation times of paramagnetic centres in initial and partly oriented trans -polyacetylene have been measured by a saturation method at 2 mm waveband EPR in the 90–300 K temperature range. Temperature dependences of the intrachain diffusion and interchain hopping rates of the paramagnetic centres in the latter samples are evaluated. Spin dynamics in the oriented sample has been shown to depend on its orientation in a magnetic field and is in good agreement with Kivelson's theory of charge transport in trans -polyacetylene via intersoliton electron hopping. Temperature evaluation of the neutral soliton width has been investigated. |
| Databáze: | OpenAIRE |
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