Accession Number : AD0760736

Title :   Variation of Crystal Fermi Energy as a Method of Obtaining Different Charge States of Ions for ESR Study,

Corporate Author : UTAH UNIV SALT LAKE CITY DEPT OF PHYSICS

Personal Author(s) : Ohlsen,W. D.

Report Date : MAR 1973

Pagination or Media Count : 9

Abstract : Publications related to the ESR of paramagnetic impurity ions in a diamagnetic insulating host often contain statements of the form 'Element X enters crystal Y in the charge state N+'. Such a statement carries an exclusive implication which may or may not be intended, but which certainly is frequently unwarrented. It is quite possible for an impurity to have associated with it one or more trapping levels in the band gap of the host insulator. Under such circumstances a variety of charge states may be obtained and studied depending on the location of the Fermi level of the crystal in the band gap. Among the possible techniques for varying the Fermi level of a crystal, reduction and diffusion doping are discussed. (Modified author abstract)

Descriptors :   (*BAND THEORY OF SOLIDS, ELECTRON PARAMAGNETIC RESONANCE), (*RUTILE, BAND THEORY OF SOLIDS), IMPURITIES, DOPING, IONS, MOLYBDENUM

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE