期刊
PHYSICAL REVIEW B
卷 85, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.092103
关键词
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资金
- NSERC
- CMMS
- NRC
Level-crossing resonances are observed for spin-polarized Li-8 in copper at 200 K. The positions of the resonances as a function of magnetic field and crystal orientation are a precise measure of the induced quadrupolar interaction on the nearest-neighbor Cu spins and provide unambiguous evidence that Li-8 occupies a substitutional site. The resonances are detected as enhancements in the Li-8 spin relaxation rate and are much broader than predicted from a static spin Hamiltonian. A strong collision model is used to extract a decoherence time as a result of the dipolar coupling of the Li-8-Cu subsystem to the surrounding nuclear spin bath.
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