25 citations · 64 across the 7 of their papers we have counts for
7 papers
Improvement of the superconducting properties of polycrystalline FeSe by silver addition
E. Nazarova, N. Balchev, K. Nenkov +4
We investigated the influence of different Ag additions (up to 10 wt %) on the superconducting properties of FeSe0.94. The structural investigations (XRD and SEM) indicated that Ag…
Transport and pinning properties of Ag-doped FeSe0.94
E. Nazarova, N. Balchev, K. Nenkov +4
We investigated the superconducting transition and the pinning properties of undoped and Ag-doped FeSe0.94 at magnetic fields up to 14 T. It was established that due to Ag addition…
The effect of Ag addition on the superconducting properties of the FeSe system
E. Nazarova, K. Buchkov, S. Terzieva +5
The tetragonal FeSe phase is an intensively investigated iron based superconductor. In this study we examined the influence of Ag addition on the superconducting properties of sele…
Scaling behavior of current- voltage characteristics of Y(1-x)CaxBa2Cu3O(7-δ) polycrystalline samples
E. Nazarova, K. Nenkov, K. Buchkov +1
I-V characteristics of polycrystalline Y(1-x)CaxBa2Cu3O(7-δ) samples (x=0.025 and 0.20) have been measured at different temperatures and magnetic fields in the range 0.1 T-6.9 T. T…
Intergranular flux pinning in underdoped and overdoped R(1-x)CaxBa2Cu3Oz (R=Y,Gd; x=0,0.2) samples
E. K. Nazarova, A. J. Zaleski, K. A. Nenkov +1
The temperature dependences of AC magnetic susceptibility at different magnetic field amplitudes and frequencies are investigated for underdoped and overdoped R(1-x)Ca(x)Ba(2)Cu(3)…
Effects of Substituting Calcium for Yttrium on the Superconducting Properties of YBa2Cu3Oz Bulk Samples
E. K. Nazarova, A. J. Zaleski, A. L. Zahariev +2
We report systematic studies of AC magnetic susceptibility and transport properties of Y(1-x)Ca(x)Ba2Cu3Oz bulk samples with 0\leq x\leq 0.4. Single phase materials, reduction of c…