MILLIMETER ELECTRON PARAMAGNETIC RESONANCE IN STRONTIUM TITANATE.
Abstract
The axial electron spin resonance spectrum of Fe(3+) doped SrTiO3 was investigated at room temperature at frequencies of 35.01, 65.09, 69.4 and 75 GHz. The magnetic field was variable from 0 to 25 K-gauss. A value of /2D/=81.2 plus or minus .14 GHz was found for the zero field splitting. An upper limit on the higher order zero field splitting terms a and F was found to be 0.5 GHz. The Hamiltonian was diagonalized using the above value of /2D/ on a computer, and the energy levels thus obtained were found to agree well with the experiment. The maximum transition probabilities were also calculated. The ratio of the intensities of the central cubic line and the axial -1/2 to +1/2 line was measured at an angle of 0 degrees. The results are in general agreement with the hypothesis that the axial spectrum is caused by local charge compensation. The crystal was subjected to a heat treatment by the National Lead Company. This heating is thought to either change Fe(2+) to Fe(3+) or Fe(2+) to Fe(4+) in the SrTiO3. Intensity measurements seem to indicate that the latter probably is more correct. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 15, 1967
- Accession Number
- AD0646439
Entities
People
- Gunter Wessel
- Ralph Baer
Organizations
- Syracuse University