Zobrazeno 1 - 10
of 435
pro vyhledávání: '"Gawalek, W."'
The recently developed manufacturing technologies use high pressure and various doping additions to prepare bulk MgB2-based materials with a high critical current density measured by the magnetization methods. We use a contactless transformer method,
Externí odkaz:
http://arxiv.org/abs/1111.6365
Autor:
Prikhna, T., Gawalek, W., Savchuk, Ya., Soldatov, A., Sokolovsky, V., Eisterer, M., Weber, H. W., Noudem, J., Serga, M., Turkevich, V., Tompsic, M., Tkach, V., Danilenko, N., Goldacker, W., Karau, F., Fesenko, I., Rindfleisch, M., Dellith, J., Wendt, M., You, S., Meerovich, V., Dub, S., Moshchil, V., Sergienko, N., Kozyrev, A., Habisreuther, T., Schmidt, Ch., Litzkendorf, D., Nagorny, P., Sverdun, V.
The synthesis of MgB2-based materials under high pressure gave the possibility to suppress the evaporation of magnesium and to obtain near theoretically dense nanograined structures with high superconducting, thermal conducting, and mechanical charac
Externí odkaz:
http://arxiv.org/abs/1005.2092
Autor:
Prikhna, T. A., Gawalek, W., Savchuk, Ya. M., Sergienko, N. V., Moshchil, V. E., Sokolovsky, V., Vajda, J., Tkach, V. N., Karau, F., Weber, H., Eisterer, M., Juolain, A., Rabier, J., Chaud, X., Wendt, M., Dellith, J., Danilenko, N. I., Habisreuther, T., Dub, S. N., Meerovich, V., Litzkendorf, D., Nagorny, P. A., Kovalev, L. K., Schmidt, Ch., Melnikov, V. S., Shapovalov, A. P., Kozyrev, A. V., Sverdun, V. B., Kosa, J., Vlasenko, A. V.
Materials of the Y-Ba-Cu-O (melt-textured YBa2Cu3O7-d-based materials or MT-YBCO) and Mg-B-O (MgB2-based materials) systems with high superconducting performance, which can be attained due to the formation of regularly distributed nanostructural defe
Externí odkaz:
http://arxiv.org/abs/0912.4899
Autor:
Prikhna, T., Gawalek, W., Savchuk, Ya., Kozyrev, A., Wendt, M., Dellith, J., Goldacker, W., Dub, S., Sergienko, N., Habisreuther, T., Moshchil, V., Dittrich, U., Karau, W., Noudem, J., Schmidt, Ch., Turkevich, V., Litzkendorf, D., Weber, H., Eisterer, M., Melnikov, V., Nagorny, P., Sverdun, V.
The influence of the oxygen segregation into Mg-B-O inclusions (which are oxygen enriched as compared to the matrix material) and the formation of boron enriched phases (with near MgB12 composition) in MgB2 structure on pinning in magnesium diboride
Externí odkaz:
http://arxiv.org/abs/0912.4903
Autor:
Prikhna, T. A., Gawalek, W., Tkach, V. M., Danilenko, N. I., Savchuk, Ya M., Dub, S. N., Moshchil, V. E., Kozyrev, A. V., Sergienko, N. V., Wendt, M., Melnikov, V. S., Dellith, J., Weber, H, Eisterer, M, Schmidt, Ch, Habisreuther, T, Litzkendorf, D, Vajda, J, Shapovalov, A. P., Sokolovsky, V., Nagorny, P. A., Sverdun, V. B., Kosa, J., Karau, F., Starostina, A. V.
The effect of doping with Ti, Ta, SiC in complex with synthesis temperature on the amount and distribution of structural inhomogeneities in MgB2 matrix of high-pressuresynthesized-materials (2 GPa) which can influence pining: higher borides (MgB12) a
Externí odkaz:
http://arxiv.org/abs/0912.4889
Autor:
Viznichenko, R. V., Kordyuk, A. A., Fuchs, G., Nenkov, K., Muller, K. -H., Prikhna, T. A., Gawalek, W.
Publikováno v:
Appl.Phys.Lett., vol.83 (no.21): 4360-4362 (2003)
Based on DC magnetization measurements, the temperature dependencies of the trapped magnetic field have been calculated for two MgB2 samples prepared by two different techniques: the high-pressure sintering and the hot pressing. Experimentally measur
Externí odkaz:
http://arxiv.org/abs/cond-mat/0307318
Autor:
Prikhna, T. A., Gawalek, W., Savchuk, Ya. M., Moshchil, V. E., Sergienko, N. V., Hergt, R., Wendt, M., Dub, S. N., Schmidt, Ch., Dellith, J., Melnikov, V. S., Habisreuther, T., Litzkendorf, D., Nagorny, P. A.
The MgB2 - based material high-pressure synthesized at 2 GPa and 800 C for 1 h from Mg and B (taken in the stoichiometry ratio of MgB2) with addition of 2-10 wt% of Ti demonstrated the critical current density (jc) higher than 100 kA/cm^2 at 33 K in
Externí odkaz:
http://arxiv.org/abs/cond-mat/0306013
Autor:
Uspenskaya, L. S., Naumenko, I. G., Emelchenko, G. A., Boguslavskii, Yu. B., Zverkov, S. A., Yakimov, E. B., Litzkendorf, D., Gawalek, W., Caplin, A. D.
Publikováno v:
Physica C 390/2 pp 127-133 2003
The downsizing 211-inclusions and an increase of their density leads to rise in mean critical current value in Y-based melt textured material. Very often 211-inclusion are spread in the material volume non-homogeneous, with typical scale 50 - 100 mic
Externí odkaz:
http://arxiv.org/abs/cond-mat/0303296
Publikováno v:
Phys. Rev. B 68, 064504 (2003)
A simple contactless method suitable to discern between the intergrain (circular) current, which flows in the thin superconducting ring, and the intragrain current, which does not cross the weakest link, has been proposed. At first, we show that the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0212533
Autor:
Prikhna, T., Gawalek, W., Novikov, N., Moshchil, V., Sverdun, V., Sergienko, N., Surzhenko, A., Wendt, M., Habisreuther, T., Litzkendorf, D., Dub, S., Mueller, R., Kordyuk, A., Kracunovska, S., Alexandrova, L.
A method of soldering of melt-textured YBa2Cu3O7-d -based (MT-YBCO) superconductive blocks using a TmBaCu3O7-d (Tm123) powder has been suggested. The method excludes stages of slow cooling during soldering and preparation of auxiliary layers. To esti
Externí odkaz:
http://arxiv.org/abs/cond-mat/0204364