Zobrazeno 1 - 10
of 29
pro vyhledávání: '"H. J. Bornemann"'
Publikováno v:
The European Physical Journal Applied Physics. 6:263-266
Bulk Y 1 Ba 2 Cu 3 O y was melt-textured without the use of seed crystals as well as by applying top-seeding with different seeds resulting in different orientations of the c -axis. Samples were examined by elastic neutron scattering and levitation f
Publikováno v:
Physica C: Superconductivity. 311:287-296
Melt textured Sm 1 Ba 2 Cu 3 O y -composites with different amounts of Sm 2 Ba 1 Cu 1 O 5 and other dopants such as Ba 3 Cu 5 O x , UO 2 and Ba-enriched composites have been prepared in air and characterized. The decrease of the critical temperature
Publikováno v:
Textures and Microstructures. 33:93-110
To investigate the correlation between the levitation force of YBaCuO cylinders when approached by a permanent magnet and the texture of these YBaCuO cylinders some of these specimens were selected which are free of microcracks, have the same oxygen
Publikováno v:
Physica C: Superconductivity. 299:185-190
Melt textured Nd 1 Ba 2 Cu 3 O y - and Sm 1 Ba 2 Cu 3 O y -composites with different additions of Nd 4 Ba 2 Cu 2 O 10 /Sm 2 Ba 1 Cu 1 O 5 have been prepared. The temperature schedule, the oxygen atmosphere during melt texturing and the amount of addi
Publikováno v:
Materials Science Forum. :595-600
YBaCuO cylinders are needed for the construction of magnetic bearings. In these YBaCuO cylinders superconducting currents are induced by approaching a permanent magnet. To obtain a high induced current in concentric circles around the cylinder axis o
Publikováno v:
Superconductor Science and Technology. 11:26-29
High-temperature superconductor bulk parts are batch processed using a semi-automated processing technique based on the melt-texturation process. Levitation properties under static and dynamic load levels were analysed using a test bench with a three
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 7:1805-1808
We present a processing technique for fabrication of advanced semi-finished parts and products based on the high-temperature superconductor (HTSC) YBa/sub 2/Cu/sub 3/O/sub 7-x/ (YBCO). High-quality YBCO bulk components are produced powder metallurgic
Publikováno v:
Zeitschrift f�r Physik B Condensed Matter. 92:451-455
We discuss the results of inelastic neutron time-of-flight spectroscopy on powder samples of C60, K3C60 and Rb3C60. A well structured density of states is obtained from the raw data where the details can be attributed to translational acoustic/optic
Publikováno v:
Journal of Physics: Condensed Matter. 5:8651-8657
Lithium-borate glasses containing 0.1-10 mol% Gd2O3 have been studied by 155Gd Mossbauer spectroscopy. Isomer shifts near 0.6 mm s-1, independent of the Gd concentration, are in the range typical of ionic Gd compounds. The spectra are very well descr
Autor:
H. J. Bornemann, D. E. Morris
Publikováno v:
Physical Review B. 44:5322-5325
We report the dependence of the oxygen isotope shift on transition temperature {ital T}{sub {ital c}} in the system YBa{sub 2{minus}{ital x}}La{sub {ital x}}Cu{sub 3}O{sub {ital z}} with 0{le}{ital x}{le}0.5. We find a significant oxygen isotope shif