Electron-spin relaxation by tunneling states in. beta. -Al/sub 2/O/sub 3/:Na
Journal Article
·
· Phys. Rev. Lett.; (United States)
Spin relaxation measurements on a color center in the conduction plane of ..beta..-Al/sub 2/O/sub 3/:Na reveal an exceptionally fast rate with an anomalous temperature and microwave frequency dependence. The data are quantitatively described by a mechanism involving the coupling of a color center to the phonon-induced relaxation of a nearby localized two-level tunneling state. The required density of such states is nearly the same as that used to explain the low-temperature properties of ..beta..-Al/sub 2/O/sub 3/:Na.
- Research Organization:
- Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
- OSTI ID:
- 6104440
- Journal Information:
- Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 42:26; ISSN PRLTA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALI METALS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ANGULAR MOMENTUM
CHALCOGENIDES
COLOR CENTERS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DIFFUSION
DISPERSIONS
ELECTRON SPIN RESONANCE
ELEMENTS
ENERGY-LEVEL TRANSITIONS
FORBIDDEN TRANSITIONS
FREQUENCY DEPENDENCE
FUNCTIONS
MAGNETIC RESONANCE
METALS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PARTICLE PROPERTIES
POINT DEFECTS
PULSE TECHNIQUES
RELAXATION
RESONANCE
SODIUM
SPIN
SPIN-LATTICE RELAXATION
TEMPERATURE DEPENDENCE
TUNNEL EFFECT
ULTRALOW TEMPERATURE
VACANCIES
VERY LOW TEMPERATURE
WAVE FUNCTIONS
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALI METALS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ANGULAR MOMENTUM
CHALCOGENIDES
COLOR CENTERS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DIFFUSION
DISPERSIONS
ELECTRON SPIN RESONANCE
ELEMENTS
ENERGY-LEVEL TRANSITIONS
FORBIDDEN TRANSITIONS
FREQUENCY DEPENDENCE
FUNCTIONS
MAGNETIC RESONANCE
METALS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PARTICLE PROPERTIES
POINT DEFECTS
PULSE TECHNIQUES
RELAXATION
RESONANCE
SODIUM
SPIN
SPIN-LATTICE RELAXATION
TEMPERATURE DEPENDENCE
TUNNEL EFFECT
ULTRALOW TEMPERATURE
VACANCIES
VERY LOW TEMPERATURE
WAVE FUNCTIONS