Spectral Diffusion in Vanadium-Doped Rutile.
Abstract
A two pulse electron-spin echo experiment was performed on a .50% TiO2V(4+) system in the temperature range between 4K deg and 40K deg. The temperature dependent echo envelope decay is discussed in terms of the spectral diffusion theory in which spin-lattice induced dipolar motion is identified as the primary decay mechanism. The phase memory time was generally found to be a monotonically decreasing function of temperature although anomalies indicative of motional narrowing were found at temperatures between 15K deg and 20K deg. Instantaneous diffusion effects for short pulses are also observed and discussed. Theoretical expressions are obtained for the echo envelope in terms of a spin-spin correlation function. Under restricted conditions, the echo envelope shape can be interpreted as the free induction decay of a narrowed line related in a simple way to the conventional absorption line observed in low power CW studies.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1976
- Bibcode:
- 1976PhDT........78C
- Keywords:
-
- Physics: Condensed Matter;
- Diffusion Theory;
- Rutile;
- Spectral Emission;
- Spectral Line Width;
- Vanadium Compounds;
- Continuous Radiation;
- Electron Paramagnetic Resonance;
- Line Spectra;
- Spin-Lattice Relaxation;
- Solid-State Physics