Nuclear spin relaxation of Li-8 in a thin film of La0.67Ca0.33MnO3
We report beta-NMR measurements of the nuclear spin relaxation rate (1/T-1) in a thin film of La0.67Ca0.33MnO3 (LCMO) using a low-energy beam of spin-polarized Li-8. In a small magnetic field of 150 G, there is a broad peak in 1/T-1 near the Curie temperature (T-c = 259 K) and a dramatic decrease in...
| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Conference item |
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2006
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| _version_ | 1797073617317527552 |
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| author | Miller, R Arseneau, D Chow, K Daviel, S Engelbertz, A Hossain, MD Keeler, T Kiefl, R Kreitzman, S Levy, C Morales, P Morris, G MacFarlane, W Parolin, T Poutissou, R Saadaou, H Salman, Z Wang, D Wei, J |
| author_facet | Miller, R Arseneau, D Chow, K Daviel, S Engelbertz, A Hossain, MD Keeler, T Kiefl, R Kreitzman, S Levy, C Morales, P Morris, G MacFarlane, W Parolin, T Poutissou, R Saadaou, H Salman, Z Wang, D Wei, J |
| author_sort | Miller, R |
| collection | OXFORD |
| description | We report beta-NMR measurements of the nuclear spin relaxation rate (1/T-1) in a thin film of La0.67Ca0.33MnO3 (LCMO) using a low-energy beam of spin-polarized Li-8. In a small magnetic field of 150 G, there is a broad peak in 1/T-1 near the Curie temperature (T-c = 259 K) and a dramatic decrease in 1/T-1 at lower temperatures. This is attributed to a critical slowing down of the spin fluctuations near T-c and freezing of the magnetic excitations at low temperatures, respectively. In addition, there is a small amplitude, slow relaxing component at high temperatures, which we attribute to Li-8 in the SrTiO3 substrate. There is an indication that the spin relaxation rate in the substrate is also peaked at T-c due to close proximity to the magnetic film. These results establish that low-energy beta-NMR can be used as a probe of magnetic fluctuations in magnetic thin films over a wide range of temperatures. (c) 2005 Elsevier B.V. All rights reserved. |
| first_indexed | 2024-03-06T23:24:36Z |
| format | Conference item |
| id | oxford-uuid:69eee2be-6c4c-402f-b8e7-28e4b71e265a |
| institution | University of Oxford |
| last_indexed | 2024-03-06T23:24:36Z |
| publishDate | 2006 |
| record_format | dspace |
| spelling | oxford-uuid:69eee2be-6c4c-402f-b8e7-28e4b71e265a2022-03-26T18:54:13ZNuclear spin relaxation of Li-8 in a thin film of La0.67Ca0.33MnO3Conference itemhttp://purl.org/coar/resource_type/c_5794uuid:69eee2be-6c4c-402f-b8e7-28e4b71e265aSymplectic Elements at Oxford2006Miller, RArseneau, DChow, KDaviel, SEngelbertz, AHossain, MDKeeler, TKiefl, RKreitzman, SLevy, CMorales, PMorris, GMacFarlane, WParolin, TPoutissou, RSaadaou, HSalman, ZWang, DWei, JWe report beta-NMR measurements of the nuclear spin relaxation rate (1/T-1) in a thin film of La0.67Ca0.33MnO3 (LCMO) using a low-energy beam of spin-polarized Li-8. In a small magnetic field of 150 G, there is a broad peak in 1/T-1 near the Curie temperature (T-c = 259 K) and a dramatic decrease in 1/T-1 at lower temperatures. This is attributed to a critical slowing down of the spin fluctuations near T-c and freezing of the magnetic excitations at low temperatures, respectively. In addition, there is a small amplitude, slow relaxing component at high temperatures, which we attribute to Li-8 in the SrTiO3 substrate. There is an indication that the spin relaxation rate in the substrate is also peaked at T-c due to close proximity to the magnetic film. These results establish that low-energy beta-NMR can be used as a probe of magnetic fluctuations in magnetic thin films over a wide range of temperatures. (c) 2005 Elsevier B.V. All rights reserved. |
| spellingShingle | Miller, R Arseneau, D Chow, K Daviel, S Engelbertz, A Hossain, MD Keeler, T Kiefl, R Kreitzman, S Levy, C Morales, P Morris, G MacFarlane, W Parolin, T Poutissou, R Saadaou, H Salman, Z Wang, D Wei, J Nuclear spin relaxation of Li-8 in a thin film of La0.67Ca0.33MnO3 |
| title | Nuclear spin relaxation of Li-8 in a thin film of La0.67Ca0.33MnO3 |
| title_full | Nuclear spin relaxation of Li-8 in a thin film of La0.67Ca0.33MnO3 |
| title_fullStr | Nuclear spin relaxation of Li-8 in a thin film of La0.67Ca0.33MnO3 |
| title_full_unstemmed | Nuclear spin relaxation of Li-8 in a thin film of La0.67Ca0.33MnO3 |
| title_short | Nuclear spin relaxation of Li-8 in a thin film of La0.67Ca0.33MnO3 |
| title_sort | nuclear spin relaxation of li 8 in a thin film of la0 67ca0 33mno3 |
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