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Wyszukujesz frazę "König, W." wg kryterium: Autor


Wyświetlanie 1-7 z 7
Tytuł:
Penetration Depth of $Tl_2Ba_2Ca_2Cu_3O_y$ and $Tl_{0.58}Pb_{0.4}Sr_{1.6}Ba_{0.4}Ca_2Cu_3O_y$ Bulk Superconductors
Autorzy:
Zalecki, R.
Woch, W.
Kołodziejczyk, A.
Konig, W.
Gritzner, G.
Powiązania:
https://bibliotekanauki.pl/articles/1374160.pdf
Data publikacji:
2014-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.72.-h
74.25.Ha
74.25.Wx
74.20.De
Opis:
The penetration depths of bulk $Tl_2Ba_2Ca_2Cu_3O_y$ and $Tl_{0.58}Pb_{0.4}Sr_{1.6}Ba_{0.4}Ca_2Cu_3O_y$ superconductors with the critical temperatures 112 K and 114 K, respectively, were determined from the AC susceptibility measurements. When the samples are in the Meissner state, the dispersive components of AC susceptibility as well as their temperature dependences reflect the changes of the penetration depths at various temperatures. In these bulk ceramic superconductors the penetration depths are of the order of few μm and they are comparable to the grains sizes in the ceramics.
Źródło:
Acta Physica Polonica A; 2014, 126, 4a; A-133-A-136
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photoemission Electronic States of Thallium- and Bismuth-Based Superconductors
Autorzy:
Zalecki, R.
Kołodziejczyk, A.
König, J. W.
Gritzner, G.
Powiązania:
https://bibliotekanauki.pl/articles/2014372.pdf
Data publikacji:
2000-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.72.-h
79.60.-i
Opis:
X-ray photoemission spectra the core-levels as well as the X-ray photoemission spectra and ultraviolet photoemission spectra from the valence bands of the (Tl$\text{}_{0.6}$Pb$\text{}_{0.5}$)(Sr$\text{}_{0.9}$Ba$\text{}_{0.1}$) Ca$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{y}$ and (Bi$\text{}_{1.75}$Pb$\text{}_{0.35}$)Sr$\text{}_{1.9}$Ca$\text{}_{2.05}$Cu$\text{}_{3.05}$O$\text{}_{y}$ superconductors were measured and analyzed. Special attention was paid to the valence band X-ray photoemission spectra and ultraviolet photoemission spectra, the Cu 2p core-level X-ray photoemission spectra and the Cu L$\text{}_{2,3}$-M$\text{}_{4,5}$M$\text{}_{4,5}$ and O K-L$\text{}_{2,3}$L$\text{}_{2,3}$ Auger spectra. Both Cu 2p$\text{}_{3}\text{}_{/}\text{}_{2}$ and Cu 2p$\text{}_{1}\text{}_{/}\text{}_{2}$ core-level lines consisted of two spin-orbit split main lines accompanied with the two satellite lines. The charge transfer energy Δ from the oxygen ligand to the copper 3d$\text{}^{9}$ states and the hopping integral t were estimated from the energy separation between the main line and the satellite line taking advantage of the local cluster model calculations and their extension to high-temperature superconductors. The Coulomb correlation on-site energy U$\text{}_{dd}$ of two electrons in the same copper orbital and U$\text{}_{pp}$ of two electrons in the oxygen orbital as well as the correlation energy U$\text{}_{cd}$ of the 2p core hole - 3d electron interaction have been estimated from the Auger electron spectra and the valence band spectra. They are: U$\text{}_{dd}$=6.0±0.5eV, of U$\text{}_{pp}$≅ 10±1eV and of U$\text{}_{cd}$≅ 8.0±0.5eV nearly the same for both the Tl- and Bi-compounds. We conclude that these compounds are the charge transfer strongly-correlated metals.
Źródło:
Acta Physica Polonica A; 2000, 98, 5; 513-524
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inter- and Intragrain Magnetization of Thallium-Based Superconductors
Autorzy:
Tokarz, W.
Kąkol, Z.
Kołodziejczyk, A.
König, W.
Gritzner, G.
Powiązania:
https://bibliotekanauki.pl/articles/2014492.pdf
Data publikacji:
2000-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.72.Fq
74.72.-h
74.50.+r
Opis:
We report on magnetization and magnetic hysteresis measurements for the (Tl$\text{}_{0.6}$Bi$\text{}_{0.5}$)(Sr$\text{}_{0.9}$Ba$\text{}_{0.1}$)$\text{}_{2}$Ca$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{y}$ Ag-sheathed superconducting tape as well as for the powdered and bulk (Tl$\text{}_{0.6}$Pb$\text{}_{0.5}$)(Sr$\text{}_{0.9}$Ba$\text{}_{0.1}$)$\text{}_{2}$Ca$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{y}$ superconductors. For the investigated tape and bulk specimens the low field magnetization showed a deviation from the ideal linear M(H) dependence, which was attributed to the superposition of inter- and intragrain superconducting currents. Fitting of the theoretical magnetization curves to the experimental data allowed for the independent determination of the intragrain critical current densities for the superconducting grains and intergrain critical current densities for the weak link system at 77K.
Źródło:
Acta Physica Polonica A; 2000, 98, 5; 633-636
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modular intelligent fixture system for flexible clamping of large parts
Autorzy:
Möhring, H.-C.
Gessler, W.
König, A.
Nguyen, L. T.
Nguyen, Q. P.
Powiązania:
https://bibliotekanauki.pl/articles/100187.pdf
Data publikacji:
2017
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
machine tool
modular fixture
hybrid material
intelligent system
Opis:
In this work a modular intelligent fixture system for flexible clamping of large parts is presented. The fixture modules consist of a hybrid material structure involving metal frame elements and mineral casting. These modules can be combined and connected to realize fixtures adapted to the geometry of the workpiece and requirements of the machining processes. By integrated pipes and interfaces, an internal hydraulic supply and active cooling is possible even for combined modules. Temperature and acceleration sensors allow for an active thermal control and process monitoring. The modules and first test fixtures are investigated in experiments.
Źródło:
Journal of Machine Engineering; 2017, 17, 4; 29-39
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optically Detected Magnetic Resonance of Excess Electrons in CdTe/(Cd,Mg)Te Quantum Wells
Autorzy:
Hu, C. Y.
Ossau, W.
Yakovlev, D. R.
König, B.
Wojtowicz, T.
Karczewski, G.
Kossut, J.
Powiązania:
https://bibliotekanauki.pl/articles/1969094.pdf
Data publikacji:
1998-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.70.Hb
71.35.-y
71.35.Ji
Opis:
The spin resonance of excess electrons is observed with the detection either on the neutral or the negatively charged exciton X$\text{}^{-}$ emission in type I CdTe/(Cd,Mg)Te quantum wells with excess electrons of low density. It is found that the electron spin-dependent and electron spin-conserving formation and recombination of X$\text{}^{-}$ make the optical detection of the spin resonance of excess electrons feasible. For the first time, optically detected magnetic resonance is used to study fast optical transition processes in the nanosecond timescale where the microwave-induced magnetic transition rate is much lower than the optical transition rate.
Źródło:
Acta Physica Polonica A; 1998, 94, 2; 351-354
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

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