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pro vyhledávání: '"Zehetmayer, M"'
Autor:
Zehetmayer, M.
Publikováno v:
Scientific Reports 5 (2015), Article number: 9244
Order-disorder transitions take place in many physical systems, but observing them in detail in real materials is difficult. In two- or quasi-two-dimensional systems, the transition has been studied by computer simulations and experimentally in elect
Externí odkaz:
http://arxiv.org/abs/1504.03123
Autor:
Zehetmayer, M.
Publikováno v:
Supercond. Sci. Technol. 26 043001 (2013)
Two-band superconductivity has become an important topic over the last ten years. Extensive experimental and theoretical studies started with MgB2 and are now focused on the iron-based and other new superconductors. In this review, I describe how imp
Externí odkaz:
http://arxiv.org/abs/1402.3956
Autor:
Zehetmayer, M., Hecher, J.
Publikováno v:
Supercond. Sci. Technol. 27 044006 (2014)
Is V3Si a two-band or a single-band superconductor? Everyone who searches the literature for this question will find conflicting answers, for V3Si was claimed to be a perfect example of two-band and claimed to be a perfect example of single-band supe
Externí odkaz:
http://arxiv.org/abs/1311.3420
Publikováno v:
Superconductor Science and Technology 27 (2014) 044009
We report on angle-resolved magnetization measurements on NdFeAsO$_{0.65}$F$_{0.35}$ (Nd-1111) single crystals. The field dependence of the critical current density, $J_c$, is non-monotonous in these crystals at all orientations and temperatures due
Externí odkaz:
http://arxiv.org/abs/1311.3476
Autor:
Kortyka, A., Puzniak, R., Wisniewski, A., Zehetmayer, M., Weber, H. W., Tang, C. Y., Yao, X., Conder, K.
Publikováno v:
Phys. Rev. B 82, 054510 (2010)
The temperature dependence of the anisotropy of the superconducting state parameters, {\gamma}, was studied by torque magnetometry for the high temperature superconductor SmBa2Cu3Ox in magnetic fields of up to 9 T. The measurements were performed on
Externí odkaz:
http://arxiv.org/abs/1007.3152
Autor:
Zehetmayer, M., Weber, H. W.
Publikováno v:
Phys. Rev. B 82, 014524 (2010)
We report on measurements and a detailed analysis of the reversible magnetization of superconducting NbSe2 single crystals. By comparing the experimental data with Ginzburg Landau theory we show that superconductivity in NbSe2 cannot be explained by
Externí odkaz:
http://arxiv.org/abs/1007.0857
Publikováno v:
Supercond. Sci. Technol. 23, 065001 (2010)
The influence of low-level Pr substitution in Y1-xPrxBa2Cu3O(7-delta) single crystals on the anisotropy of the superconducting state parameters was investigated by torque magnetometry in magnetic fields of up to 9 T. An averaged anisotropy parameter,
Externí odkaz:
http://arxiv.org/abs/1003.3793
Autor:
Eisterer, M., Zehetmayer, M., Weber, H. W., Jiang, J., Weiss, J. D., Yamamoto, A., Hellstrom, E. E., Larbalestier, D. C., Zhigadlo, N. D., Karpinski, J.
Publikováno v:
Supercond. Sci. Technol. 23 (2010) 054006
We report the influence of atomic disorder introduced by sequential neutron irradiation on the basic superconducting properties, flux pinning and grain connectivity. Two different polycrystalline Sm-1111 samples (SmFeAsO_{1-x}F_x) and two Ba-122 sing
Externí odkaz:
http://arxiv.org/abs/1001.5386
Autor:
Zehetmayer, M., Eisterer, M., Weber, H. W., Jiang, J., Weiss, J. D., Yamamoto, A., Polyanskii, A. A., Hellstrom, E. E., Larbalestier, D. C.
Investigating the role of disorder in superconductors is an essential part of characterizing the fundamental superconducting properties as well as assessing potential applications of the material. In most cases, the information available on the defec
Externí odkaz:
http://arxiv.org/abs/0911.5582
Autor:
Zehetmayer, M.
Publikováno v:
Phys. Rev. B 80, 104512 (2009)
A simple model for simulating the current dynamics and the magnetic properties of superconductors is presented. Short simulation times are achieved by solving the differential form of Maxwell's equations inside the sample, whereas integration is only
Externí odkaz:
http://arxiv.org/abs/0909.0597