Accession Number : AD0837102

Title :   INTERACTION OF HOT ELECTRONS WITH OPTICAL MODES OF LATTICE VIBRATIONS,

Corporate Author : ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL AL PHY SICAL SCIENCES DIRECTORATE

Personal Author(s) : Bennett, J. S. ; Wilkinson, E. L. ; Hartman, R. L.

Report Date : 1968

Pagination or Media Count : 14

Abstract : Much research in solid state physics has been motivated by the need for a better understanding of the interaction of electrons with their crystalline surroundings. Our approach to gaining a better understanding of the dynamic interactions has been to study, via the techniques of electron spin resonance spectroscopy, the processes whereby a hot paramagnetic electron (one in an excited state) gives its excess energy to the lattice. It does this by reorienting its spin in an externally applied magnetic field and simultaneously either creating a quantum of lattice vibrational energy (Direct Process), or absorbing one of the quanta already present in the crystal and emitting one of higher energy (Raman scattering process). Such processes are collectively termed 'spin-lattice relaxation.' The primary subject of our study was the temperature dependence of spin-lattice relaxation of dilute Cr(3+) in cubic MgO. (Author)

Descriptors :   (*ELECTRON PARAMAGNETIC RESONANCE, TEMPERATURE), ELECTRON TRANSITIONS, MAGNETIC FIELDS, CRYSTAL LATTICES, TIME, PHONONS, ELECTRONS, INTERACTIONS, EXPERIMENTAL DATA.

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE