Zobrazeno 1 - 10
of 18
pro vyhledávání: '"H T Tohver"'
Publikováno v:
Journal of Physics: Condensed Matter. 7:9625-9633
To address recent electron paramagnetic resonance experiments showing a distortion at the H2- site lowering the defect symmetry from cubic to tetragonal in CaO crystal, we have investigated the defect-induced lattice relaxation of an H2- ion in CaO w
Publikováno v:
Journal of Physics: Condensed Matter. 7:7063-7067
Data on the Raman scattering of F and F+ centres in CaO are recorded. Symmetry assignments of the Raman effect of F+ centres are in agreement with the F+ emission spectrum measurements of Hughes, Pells and Sender. Furthermore, polarization results sh
Autor:
H T Tohver, S C Ke
Publikováno v:
Journal of Physics: Condensed Matter. 6:8331-8334
The Delta M=2 spin transitions are forbidden in first-order perturbation theory but allowed in the second order. With electron paramagnetic resonance, we have observed such transitions for Mn2+ in CaO between the M= 1/2 and M=+3/2 levels between the
Publikováno v:
Physical Review B. 49:15392-15395
We report a measurement of an axially symmetric g tensor for the substitutional nitrogen center in type-IIa synthetic isopure $^{12}\mathrm{C}$ diamond. Because the nitrogen concentration of the diamond studied is exceptionally low the electron-param
Publikováno v:
MRS Proceedings. 441
A thick (130 im) homoepitaxial diamond film was grown on a polished, single crystal {100} oriented natural type Ila diamond circular plate using high density microwave plasma chemical vapor deposition (MPCVD). The as-grown film shows facets around it
Publikováno v:
Physical review. B, Condensed matter. 51(13)
Publikováno v:
Physical Review B. 27:1283-1291
Experimental measurements and theoretical calculations are reported which may resolve some of the remaining difficulties associated with photoemission from anion vacancies in thermochemically reduced MgO crystals. The intensities of the 2.3- and 3.2-
Publikováno v:
Physical Review B. 18:4136-4142
The effect of oxidation and reduction on Li-containing MgO crystals at temperatures up to 1600 K is reported. Heating in oxidizing atmospheres followed by fast cooling produces stable [Li]\ifmmode^\circ\else\textdegree\fi{} defects, whereas similar t
Publikováno v:
Physical Review B. 30:6093-6102
The dielectric breakdown of MgO crystals at elevated temperatures is investigated as a function of such parameters as temperature, thickness, electric field, ambient atmosphere, electrode material, and impurity content. The prebreakdown electrical ch
Publikováno v:
Physical Review B. 14:5466-5472