Zobrazeno 1 - 10
of 135
pro vyhledávání: '"R. Scharfschwerdt"'
Publikováno v:
Solid State Communications. 116:133-136
In BaTiO3 a paramagnetic defect is identified by EPR which is attributed to a paramagnetic S=1/2 ion off-center near a Ba site. Twelve magnetically distinguishable sites contribute to the angular dependence pattern of the spectra, each of the sites b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fba87c48eac29a732308d43359e87c65
https://doi.org/10.1016/s0038-1098(00)00307-0
https://doi.org/10.1016/s0038-1098(00)00307-0
Publikováno v:
Applied Physics B: Lasers and Optics. 67:79-86
crystals are given. The extension of this type of spectroscopy to other fields, where correlation between EPR and optical phenomena is essential, is discussed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb0333f87ac3ce707896c5abb56ed060
https://doi.org/10.1007/s003400050478
https://doi.org/10.1007/s003400050478
Publikováno v:
Physical Review B. 54:15284-15290
Using electron paramagnetic resonance two types of ${\mathrm{Ti}}^{3+}$-related centers are identified in BaTi${\mathrm{O}}_{3}$, which are attributed to ${\mathrm{Ti}}^{3+}$-${V}_{\mathrm{O}}$ and to ${\mathrm{Ti}}^{3+}$-${V}_{\mathrm{O}}$ associate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af5b899baa58681d5e71a67da682d09a
https://doi.org/10.1103/physrevb.54.15284
https://doi.org/10.1103/physrevb.54.15284
Publikováno v:
Ferroelectrics. 185:9-12
Depending on the acceptor content of BaTiO3 crystals, two types of Ti3+ ESR signals are observed. Acceptor-poor samples, which thus also have low concentrations of compensating oxygen vacancies, Vo, contain isolated Ti3+ free small polarons. Acceptor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a03a8088a9bdfd435116345f3616254e
https://doi.org/10.1080/00150199608210467
https://doi.org/10.1080/00150199608210467
Publikováno v:
Physical Review B. 53:116-125
In ${\mathrm{BaTiO}}_{3}$ the alkali ions Na and K, replacing Ba, lead to acceptor levels about 50 meV above the valence band edge. The structure of these defects can be studied by electron spin resonance, after light induced valence-band holes have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cb5dad27d9c9bb93f0ac00db7a9a8d6
https://doi.org/10.1103/physrevb.53.116
https://doi.org/10.1103/physrevb.53.116
Publikováno v:
Applied Physics B Laser and Optics. 61:1-7
By combined studies of electron spin resonance and optical absorption at low temperatures, the charge-transfer bands of Rh5+ and Rh4+ are identified to be peaked near 1.6 and 1.9 eV, respectively. On this basis, the light-induced charge-transfer proc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::847354b50ba6e59a6d10031013f2d0f2
https://doi.org/10.1007/bf01090965
https://doi.org/10.1007/bf01090965
Autor:
H. Hesse, T. Varnhorst, O. F. Schirmer, R. Scharfschwerdt, C. Kuper, E. Possenriede, H. Kröse
Publikováno v:
Optical Materials. 4:153-157
An optical method is presented which allows to identify at room temperature the photoinduced charge transfers between different defects in photorefractive crystals. The analysis is based on the labelling of the opticfal spectra with the corresponding
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d6bf166c618681aabe6b17872c8607a
https://doi.org/10.1016/0925-3467(94)00053-0
https://doi.org/10.1016/0925-3467(94)00053-0
Publikováno v:
Ferroelectrics. 151:199-204
Two shallow O- trapped hole centers in BaTiO3 are identified to arise from association with Na+ and Ptx+. In material with decreased acceptor concentration, ESR of Ti3+ small polarons and Ti3+-Nb5+ pairs is found. The role of such centers in light in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc59fbb0a9df9537624a42df5e1e4f02
https://doi.org/10.1080/00150199408244743
https://doi.org/10.1080/00150199408244743
Autor:
Georg F. Hoffmann, S. R. Scharfschwerdt, Yoon S. Shin, K. M. Gibson, S. U. Brendel, I. M. Speidel
Publikováno v:
Journal of Inherited Metabolic Disease. 15:738-746
Mevalonic aciduria due to mevalonate kinase deficiency, an inherited defect of cholesterol biosynthesis, has presented with clinical variability in 10 patients from 7 families. We sought to define a genetic basis for this heterogeneity by determining
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4fec305b374f4818df178942bd8b53de
https://doi.org/10.1007/bf01800016
https://doi.org/10.1007/bf01800016
Autor:
G. Pauliat, G. Roosen, Daniel Rytz, R. Scharfschwerdt, J.M.C. Jonathan, Nicolas Huot, O.F. Schirmer
Publikováno v:
CLEO/Europe Conference on Lasers and Electro-Optics.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::147abbbb847bcab29310e812a3e7f1cb
https://doi.org/10.1109/cleoe.1998.719582
https://doi.org/10.1109/cleoe.1998.719582