Zobrazeno 1 - 10
of 70
pro vyhledávání: '"M.H. Nazaré"'
Publikováno v:
Physica B: Condensed Matter. :616-620
Optical and magnetic properties of nickel related defects in as-grown diamond are reviewed. Published and new data on the problem of negatively charged substitutional nickel are presented and discussed. We show that the 2.51 eV absorption band occurs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d195a9a340db96b4354729b126028f5f
https://doi.org/10.1016/s0921-4526(01)00761-x
https://doi.org/10.1016/s0921-4526(01)00761-x
Autor:
Nikolai A. Sobolev, Hisao Kanda, M.H. Nazaré, Wolfgang Gehlhoff, A. Näser, A.J. Neves, Rui N. Pereira
Publikováno v:
Diamond and Related Materials. 9:1057-1060
We report three new paramagnetic centers found in high-pressure synthetic diamond with high nitrogen and nickel content and annealed at 1600°C. Analysis of the spectra has shown that two of the centers, labeled AB1 and AB2, are related to systems wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4b81da228742792fec54a97c2ebfe57
https://doi.org/10.1016/s0925-9635(99)00329-5
https://doi.org/10.1016/s0925-9635(99)00329-5
Publikováno v:
Diamond and Related Materials. 9:483-488
It is generally accepted that SiC layers are often involved in the adhesion efficiency of chemical vapour deposition (CVD) diamond films on Si-containing substrates. Si 3 N 4 –SiC composite substrates with different amounts of SiC particles (0–50
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2d37573b0997202a5a26b923d78e5a9
https://doi.org/10.1016/s0925-9635(99)00285-x
https://doi.org/10.1016/s0925-9635(99)00285-x
Publikováno v:
Physica B: Condensed Matter. :636-639
We report uniaxial stress measurements on the 1.693 eV zero-phonon line, observed on nickel- and nitrogen-containing synthetic diamonds after annealing at 1600°C. We show that the line is an electric dipole transition which occurs at a defect of rho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::122ddcb658350a7448c4168c43cfc1e7
https://doi.org/10.1016/s0921-4526(99)00592-x
https://doi.org/10.1016/s0921-4526(99)00592-x
Autor:
M.H Nazaré, Nikolai A. Sobolev
Publikováno v:
Physica B: Condensed Matter. :271-274
Photoluminescence due to radiation defects in silicon doped with Ge at a concentration of 2×1020 cm−3 and subjected to neutron irradiation and subsequent annealing is analyzed and compared to that of silicon crystals containing less or no Ge. Seve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b49527b09a9bebed82d8cb78c5e4af36
https://doi.org/10.1016/s0921-4526(99)00489-5
https://doi.org/10.1016/s0921-4526(99)00489-5
Autor:
Hisao Kanda, Nikolai A. Sobolev, A.J. Neves, Wolfgang Gehlhoff, A. Näser, Rui N. Pereira, M.H. Nazaré
Publikováno v:
Physica B: Condensed Matter. :651-654
We report four new EPR spectra found in high-pressure synthetic diamonds with high nitrogen content, grown using nickel, and annealed at 1600°C. Analyzing the complex spectra around g≈2 two trigonal and two orthorhombic defects, all with S= 1 2 ,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::608f2256234b055df60af3cbfed88ff6
https://doi.org/10.1016/s0921-4526(99)00596-7
https://doi.org/10.1016/s0921-4526(99)00596-7
Publikováno v:
Diamond and Related Materials. 8:855-858
Thick microwave plasma chemical vapour deposition (MPCVD) diamond films (240, 480, 1000 μm) were grown, laser cut and vacuum brazed to steel bars with an Ag/Cu/Ti (100 μm) reactive filler metal. Displacement sensing indentation experiments using a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5e6857cf068e3a55abce7faf437545a
https://doi.org/10.1016/s0925-9635(98)00320-3
https://doi.org/10.1016/s0925-9635(98)00320-3
Publikováno v:
Diamond and Related Materials. 6:769-773
Diamond films produced by CVD are an attractive approach for lifetime improvement of conventional hard metal wear parts and cutting tools. However, the presence of the cobalt binder catalyses the formation of a weak graphite layer between the film an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d82c281c092e6e76446913a0d1e74fd
https://doi.org/10.1016/s0925-9635(96)00669-3
https://doi.org/10.1016/s0925-9635(96)00669-3
Publikováno v:
Journal of Crystal Growth. 159:826-829
We report the observation of discrete modes in the upper branch of the exciton-polariton. In micrometer thick ZnSe epilayers grown on GaAs substrates by metal organic vapour phase epitaxy we have studied the evolution of the reflectivity spectra as a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c36b3a0d18d2aad4b468e44199d5e38b
https://doi.org/10.1016/0022-0248(95)00869-1
https://doi.org/10.1016/0022-0248(95)00869-1
Autor:
S.E. Daly, Martin O. Henry, J.D. Campion, M.C. do Carmo, Enda McGlynn, M.H. Nazaré, Kevin G. McGuigan
Publikováno v:
ResearcherID
The results of a photoluminescence study of the Group II elements Be, Cd and Zn in silicon show that oxygen-rich samples contain defects not observed in oxygen-lean material. Uniaxial stress and Zeeman measurements show that all the defect spectra ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a0f5c8fb050bbd42c3114a2f21e6ab84
https://doi.org/10.1016/0921-5107(95)01290-7
https://doi.org/10.1016/0921-5107(95)01290-7