Zobrazeno 1 - 10
of 318
pro vyhledávání: '"Obst, B."'
Publikováno v:
In CIRP Annals - Manufacturing Technology 2020 69(1):337-340
Publikováno v:
IEEE Transactions of Applied Superconductivity 13 (2003) 3203
MgB2 wires and tapes suffer from a limitation of the transport current densities, especially at low field, due to an unsufficient thermal stabilization caused by hot spots from a non-homogeneous microstructure, the presence of secondary phases and vo
Externí odkaz:
http://arxiv.org/abs/cond-mat/0210591
In this contribution, different concepts for mechanically reinforced MgB2 wires with high transport currents are presented and characterised. It is shown that the achieved critical transport currents depend strongly on the conductor concept, the choi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0204599
Autor:
Schlachter, S. I., Tutsch, U., Fietz, W. H., Weiss, K. -P., Leibrock, H., Grube, K., Wolf, Th., Obst, B., Schweiss, P., Wuehl, H.
Publikováno v:
International Journal of Modern Physics B 14 (2000) 3673
In YBa2Cu3Ox, distinct features are found in the pressure dependence of the transition temperature, dTc/dp, and in DeltaCp*Tc, where DeltaCp is the jump in the specific heat at Tc: dTc/dp becomes zero when DeltaCp*Tc is maximal, whereas dTc/dp has a
Externí odkaz:
http://arxiv.org/abs/cond-mat/0103195
Autor:
Schlachter, S. I., Weiss, K. -P., Fietz, W. H., Grube, K., Leibrock, H., Wolf, Th., Obst, B., Schweiss, P., Klaeser, M., Wuehl, H.
We studied Tc of YBa2Cu3Ox (Y123), Y0.89Ca0.11Ba2Cu3Ox (YCa123) and NdBa2Cu3Ox (Nd123) single crystals with various oxygen contents x. Compared to Tc(x) of Y123 the Tc(x) curves of YCa123 are shifted to lower oxygen contents and the maximum transitio
Externí odkaz:
http://arxiv.org/abs/cond-mat/9912357
The specific heat of Nd(Y)Ba2Cu3Ox single crystals without substitution of Nd for Ba has been measured for various oxygen contents. In comparison with YBa2Cu3Ox, the maximum attainable transition temperature of the crystals is about 4 K higher and sh
Externí odkaz:
http://arxiv.org/abs/cond-mat/9912361
Autor:
Grube, K., Leibrock, H., Fietz, W. H., Schlachter, S. I., Rykov, A. I., Tajima, S., Schweiss, P., Obst, B., Wuehl, H.
The linear compressibilities and the thermal expansion of an untwinned, nearly optimal doped YBa2Cu3O6.94 single crystal were measured along the three crystallographic axes with a high-resolution dilatometer mounted in a high-pressure cell. The measu
Externí odkaz:
http://arxiv.org/abs/cond-mat/9912359
Publikováno v:
Physica C 328 (1999) 1-13
We performed susceptibility measurements on Y1-yCayBa2Cu3Ox single crystals under high He pressure. For each Ca content various samples with different oxygen contents have been prepared to probe the influence of Ca on Tc(x), dTc/dp(x) and Tc,max. Sta
Externí odkaz:
http://arxiv.org/abs/cond-mat/9912335
Publikováno v:
to be published in J. Low Temp. Physics 117 (5/6) (1999)
We present results of reflectivity measurements with E parallel to c and E perpendicular to c on NdBa2Cu3Ox (Nd123) single crystals close to full oxygen doping. Along the c-axis the optical conductivity shows a well developed absorption band around 4
Externí odkaz:
http://arxiv.org/abs/cond-mat/9912333
Publikováno v:
Limnology and Oceanography, 1989 Mar 01. 34(2), 451-456.
Externí odkaz:
https://www.jstor.org/stable/2837121