MU-SR STUDIES OF SPIN EXCITATIONS IN POLYANILINE
Muon techniques have been used to study the spill excitations in polyaniline. The relaxation rate provides information about the spin dynamics. 1D spin diffusion is observed at low temperature in non-metallic materials with a crossover to 2 or 3D behaviour at higher temperature. In metallic polyanil...
| Main Authors: | , , , , , , |
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| Format: | Conference item |
| Published: |
1995
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| _version_ | 1797062540237209600 |
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| author | Pratt, F Valladares, R Pattenden, P Blundell, S Hayes, W Monkman, A Nagamine, K |
| author_facet | Pratt, F Valladares, R Pattenden, P Blundell, S Hayes, W Monkman, A Nagamine, K |
| author_sort | Pratt, F |
| collection | OXFORD |
| description | Muon techniques have been used to study the spill excitations in polyaniline. The relaxation rate provides information about the spin dynamics. 1D spin diffusion is observed at low temperature in non-metallic materials with a crossover to 2 or 3D behaviour at higher temperature. In metallic polyaniline, in contrast to the undoped cases, the relaxation is rapidly quenched by field at all temperatures. Static and dynamic terms in the relaxation can be separated. The dynamic term shows a high field cutoff which occurs around 25 G at 20 K. This relaxation behaviour indicates a broad spectrum of spin fluctuations concentrated at frequencies in the region below 0.3 MHz. This is a frequency region that is somewhat lower than previously studied by other probes of spin dynamics. |
| first_indexed | 2024-03-06T20:46:58Z |
| format | Conference item |
| id | oxford-uuid:363ac3b2-6086-4906-adf3-f35f4367d3b8 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T20:46:58Z |
| publishDate | 1995 |
| record_format | dspace |
| spelling | oxford-uuid:363ac3b2-6086-4906-adf3-f35f4367d3b82022-03-26T13:36:37ZMU-SR STUDIES OF SPIN EXCITATIONS IN POLYANILINEConference itemhttp://purl.org/coar/resource_type/c_5794uuid:363ac3b2-6086-4906-adf3-f35f4367d3b8Symplectic Elements at Oxford1995Pratt, FValladares, RPattenden, PBlundell, SHayes, WMonkman, ANagamine, KMuon techniques have been used to study the spill excitations in polyaniline. The relaxation rate provides information about the spin dynamics. 1D spin diffusion is observed at low temperature in non-metallic materials with a crossover to 2 or 3D behaviour at higher temperature. In metallic polyaniline, in contrast to the undoped cases, the relaxation is rapidly quenched by field at all temperatures. Static and dynamic terms in the relaxation can be separated. The dynamic term shows a high field cutoff which occurs around 25 G at 20 K. This relaxation behaviour indicates a broad spectrum of spin fluctuations concentrated at frequencies in the region below 0.3 MHz. This is a frequency region that is somewhat lower than previously studied by other probes of spin dynamics. |
| spellingShingle | Pratt, F Valladares, R Pattenden, P Blundell, S Hayes, W Monkman, A Nagamine, K MU-SR STUDIES OF SPIN EXCITATIONS IN POLYANILINE |
| title | MU-SR STUDIES OF SPIN EXCITATIONS IN POLYANILINE |
| title_full | MU-SR STUDIES OF SPIN EXCITATIONS IN POLYANILINE |
| title_fullStr | MU-SR STUDIES OF SPIN EXCITATIONS IN POLYANILINE |
| title_full_unstemmed | MU-SR STUDIES OF SPIN EXCITATIONS IN POLYANILINE |
| title_short | MU-SR STUDIES OF SPIN EXCITATIONS IN POLYANILINE |
| title_sort | mu sr studies of spin excitations in polyaniline |
| work_keys_str_mv | AT prattf musrstudiesofspinexcitationsinpolyaniline AT valladaresr musrstudiesofspinexcitationsinpolyaniline AT pattendenp musrstudiesofspinexcitationsinpolyaniline AT blundells musrstudiesofspinexcitationsinpolyaniline AT hayesw musrstudiesofspinexcitationsinpolyaniline AT monkmana musrstudiesofspinexcitationsinpolyaniline AT nagaminek musrstudiesofspinexcitationsinpolyaniline |