Zobrazeno 1 - 10
of 38
pro vyhledávání: '"M. VELTER-STEFANESCU"'
Publikováno v:
Journal of Superconductivity: Incorporating Novel Magnetism. 11:327-330
The high-T c superconducting system YBa2Cu3Oδ:Li (123) was investigated by microwave absorption. The effect of neutron irradiation on the 123 phase as well as the dependence of the resulting modification both on the neutron fluence and on the doping
Publikováno v:
Journal of Superconductivity. 10:165-169
Modification induced by thermal treatments in different gaseous environments (nitrogen, helium, and oxygen), on the 2223 phase formatted in two BI(?B)SrCaCuO systems, were investigated by the microwave methods DMA (direct microwave absorption) and MA
Publikováno v:
Journal of Materials Science. 32:1195-1199
The correlation between the structure, chemical composition, electrical and magnetic properties of Bi2Sr2CaCu2O8+δ single crystals is presented. As revealed by SEM measurements, the small samples (approximately 1 mm×1 mm×0.2 mm) are stacks of thin
Autor:
M Velter-Stefanescu, D P Lazar
Publikováno v:
Journal of Physics: Condensed Matter. 6:1053-1056
The theoretical angular dependence of the direct-process relaxation rate T1-1 of the trigonal Yb3+ ions (T4 centres) in a SrF2 single crystal was determined and compared with the experimental dependence. The theoretical estimation was made according
Autor:
M. Velter‐Stefanescu, O. G. Duliu
Publikováno v:
AIP Conference Proceedings.
A ceramic high temperature superconductor [HTS] of Y‐Ba‐Cu‐O type has been investigated at 77 K by using a standard X‐band Electron Paramagnetic Resonance (EPR) configuration. At very low microwave power (< 1 mW) the non‐resonant or zero fi
Publikováno v:
Physical review. B, Condensed matter. 35(10)
Publikováno v:
ACS Symposium Series ISBN: 9780841208599
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72796f15a63864c3dcb2a7597065bdb4
https://doi.org/10.1021/bk-1984-0260.ch005
https://doi.org/10.1021/bk-1984-0260.ch005
Autor:
S V Nistor, M Velter-Stefanescu
Publikováno v:
Journal of Physics E: Scientific Instruments. 20:546-547
A short description is given of a homodyne X-band ESR spectrometer and its operating mode for electronic spin-lattice relaxation time measurements at low temperatures. The spin-lattice relaxation times are determined using a modified saturation-recov
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Akademický článek
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