R
Roman Puzniak
Researcher at Polish Academy of Sciences
Publications - 206
Citations - 4643
Roman Puzniak is an academic researcher from Polish Academy of Sciences. The author has contributed to research in topics: Magnetization & Superconductivity. The author has an hindex of 35, co-authored 195 publications receiving 4384 citations. Previous affiliations of Roman Puzniak include Solid State Physics Laboratory & ETH Zurich.
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Magnetic properties of electron-doped La0.23Ca0.77MnO3 nanoparticles
V. Markovich,Grzegorz Jung,A. Wisniewski,D. Mogilyansky,Roman Puzniak,Amit Kohn,Xiaodong Wu,Kiyonori Suzuki,G. Gorodetsky +8 more
TL;DR: In this paper, the authors investigated the magnetic properties of electron-doped La0.23Ca0.77MnO3 manganite nanoparticles, with average size of 12 and 60 nm, prepared by the glycine-nitrate method, in the temperature range 5-300k and magnetic fields up to 90kOe.
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Carbon substitution in MgB2 single crystals: Structural and superconducting properties
S. M. Kazakov,Roman Puzniak,Roman Puzniak,Krzysztof Rogacki,Krzysztof Rogacki,Andrei V. Mironov,Nikolai D. Zhigadlo,J. Jun,Ch. Soltmann,Bertram Batlogg,J. Karpinski +10 more
TL;DR: In this paper, the growth of carbon-substituted magnesium diboride is reported and the structural, transport, and magnetization data are presented, and the superconducting transition temperature decreases monotonically with increasing carbon content in the full investigated range of substitution.
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Temperature and field dependence of the anisotropy of MgB2.
Manuel Angst,Roman Puzniak,A. Wisniewski,J. Jun,S. M. Kazakov,J. Karpinski,J. Roos,Horst Uwe Keller +7 more
TL;DR: In this paper, the anisotropy of the superconducting state of high quality single crystals of ${MgB}} was determined, using torque magnetometry with two different methods.
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Evidence for a Temperature and Field Dependence of the Anisotropy of MgB2
Manuel Angst,Roman Puzniak,A. Wisniewski,J. Jun,S. M. Kazakov,J. Karpinski,J. Roos,Horst Uwe Keller +7 more
TL;DR: The anisotropy gamma of the superconducting state of high quality single crystals of MgB2 was determined, using torque magnetometry with two different methods, finding the unusual temperature dependence and can be explained by nonlocal effects of anisotropic pairing and/or the k--> dependence of the effective mass tensor.
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Single crystals of superconducting SmFeAsO1−xFy grown at high pressure
TL;DR: In this paper, single crystals of SmFeAsO1−xFy of a size up to 120 × 100 µm2 have been grown from NaCl/KCl flux at a pressure of 30 kbar and temperature of 1350-1450 °C using the cubic anvil high-pressure technique.