Nuclear spin relaxation of 8Li in a thin film of La0.67Ca0.33MnO3
Creators
- 1. TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, Canada V6T 2A3 (Canada)
- 2. TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, V6T 2A3 (Canada)
- 3. Department of Physics, University of Alberta, Edmonton, Alta., T6G 2J1 (Canada)
- 4. Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, V6T 1Z1 (Canada)
- 5. TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, V6T 2A3 (Canada): Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, Canada V6T 1Z1 (Canada): Canadian Institute for Advanced Research, Toronto, Ont., Canada M5G 1Z8 (Canada)
- 6. Department of Physics, University of Toronto, Toronto, Ont., M5S 1A7 (Canada)
- 7. TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, V6T 2A3 (Canada): Department of Chemistry, University of British Columbia, Vancouver, BC, V6T 1Z1 (Canada)
- 8. Department of Chemistry, University of British Columbia, Vancouver, BC, V6T 1Z1 (Canada)
- 9. Canadian Institute for Advanced Research, Toronto, Ont., M5G 1Z8 (Canada): Department of Physics, University of Toronto, Toronto, Ont., M5S 1A7 (Canada)
Description
We report β-NMR measurements of the nuclear spin relaxation rate (1/T1) in a thin film of La0.67Ca0.33MnO3 (LCMO) using a low-energy beam of spin-polarized 8Li. In a small magnetic field of 150G, there is a broad peak in 1/T1 near the Curie temperature (Tc=259K) and a dramatic decrease in 1/T1 at lower temperatures. This is attributed to a critical slowing down of the spin fluctuations near Tc 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 8Li in the SrTiO3 substrate. There is an indication that the spin relaxation rate in the substrate is also peaked at Tc due to close proximity to the magnetic film. These results establish that low-energy β-NMR can be used as a probe of magnetic fluctuations in magnetic thin films over a wide range of temperatures
Additional details
Identifiers
- DOI
- 10.1016/j.physb.2005.11.009;
- PII
- S0921-4526(05)01207-X;
Publishing Information
- Journal Title
- Physica. B, Condensed Matter
- Journal Volume
- 374-375
- Journal Page Range
- p. 30-33
- ISSN
- 0921-4526
- CODEN
- PHYBE3
Conference
- Title
- 10. international conference on muon spin rotation, relaxation and resonance
- Dates
- 8-12 Aug 2005
- Place
- Oxford (United Kingdom)
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37072931
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- AMPLITUDES; CALCIUM COMPOUNDS; CURIE POINT; EXCITATION; FERROMAGNETISM; FLUCTUATIONS; LANTHANUM COMPOUNDS; LITHIUM 8; MAGNETIC FIELDS; MANGANATES; NUCLEAR MAGNETIC RESONANCE; RELAXATION; SLOWING-DOWN; SPIN; SPIN ORIENTATION; STRONTIUM TITANATES; SUBSTRATES; TEMPERATURE DEPENDENCE; THIN FILMS
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; ANGULAR MOMENTUM; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; ENERGY-LEVEL TRANSITIONS; FILMS; ISOTOPES; LIGHT NUCLEI; LITHIUM ISOTOPES; MAGNETIC RESONANCE; MAGNETISM; MANGANESE COMPOUNDS; MILLISECONDS LIVING RADIOISOTOPES; NUCLEI; ODD-ODD NUCLEI; ORIENTATION; OXYGEN COMPOUNDS; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; RADIOISOTOPES; RARE EARTH COMPOUNDS; RESONANCE; STRONTIUM COMPOUNDS; THERMODYNAMIC PROPERTIES; TITANATES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION TEMPERATURE; VARIATIONS
Optional Information
- Copyright
- Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.