NDLI: The Effect of Ag Addition on the Superconducting Properties of FeSe$

Content Provider	Springer Nature Link
Author	Nazarova, E. Buchkov, K. Terzieva, S. Nenkov, K. Zahariev, A. Kovacheva, D. Balchev, N. Fuchs, G.
Copyright Year	2014
Abstract	In this study, we examined the influence of Ag addition on the superconducting properties of polycrystalline FeSe$_{0.94}$. The samples were obtained by a solid-state reaction and melting. The X-ray diffractometry (XRD) analysis showed the presence of a tetragonal phase, while the energy-dispersive X-ray analysis (EDX) analysis established an inhomogeneous Ag distribution in the grains. The superconducting properties were investigated by measuring the AC magnetic susceptibility’s fundamental and third harmonic. The intergranular critical current determined from the AC magnetic susceptibility in the Ag-doped sample was several times higher than that in the undoped one, obtained by melting at approximately the same temperatures. The irreversibility lines were obtained from the temperature dependence of the AC magnetic susceptibility’s third harmonic at different DC magnetic fields. It was found that adding Ag increases the irreversibility field in comparison with both undoped (melted and powder-sintered) samples. All results showed that the Ag addition to FeSe$_{0.94}$ samples improves the following intergranular and intragranular properties: screening ability, pinning, activation energy, and critical current and increases the irreversibility field.
Starting Page	1135
Ending Page	1138
Page Count	4
File Format	PDF
ISSN	15571939
Journal	Journal of Superconductivity and Novel Magnetism
Volume Number	28
Issue Number	3
e-ISSN	15571947
Language	English
Publisher	Springer US
Publisher Date	2014-11-13
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	FeSe Ag addition AC magnetic susceptibility Intergrain properties Irreversibility line Strongly Correlated Systems, Superconductivity Magnetism, Magnetic Materials Condensed Matter Physics Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Condensed Matter Physics

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