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Slovak Academy of Sciences

Institute of Electrical Engineering

Main Activity: 

Technology and testing of superconducting materials, tapes and conductors for electronic and power engineering applications – SQUIDs, magnets, cables, transformers.

http://www.astra.sav.sk/

Contact
Name: 
Fedor Gömöry
Address: 

Institute of Electrical Engineering
Slovak Academy of Sciences
Dept. Supercond. Physics
841 04 Bratislava
Slovak Republic

Phone: 
+4212-5477 5820
Fax: 
+4212-5477 5816

Institute of Experimental Physics, Košice

Main Activity: 
  • Technology and properties of bulk REBCO superconducting materials. Description :  At this time there is no webpage encompassing superconductivity-related activities at the Institute (except of the Centre of Low Temperature Physics, see below).  Therefore, the following brief description is provided here: The Group of ceramic superconductors at the IEP SAS Košice is active in preparation and characterization of bulk REBCO single-grain superconductors. Earlier studies were devoted mainly to characterization of crystal defects and description of mechanisms of their formation. Information about the inhomogeneity of 211 particle concentration in the 123 crystal, formation of subgrain structure, shape change of the sample during solidification, new inert particles in the 123/211 system, modes of growth, sources of mechanical stresses and cracking were obtained between years 1995-2005 and contributed essentially to the general understanding of microstructure formation in the REBCO bulk TSMG superconductors, enabled interpretation of their superconducting properties and became the base for optimization of their properties. 
    Nowadays, our activity is focused mainly on:
    • Formation of effective pinning centers homogeneously distributed in the 123 crystal.  In this program we study the influence of chosen alloying elements on the pushing of 211 particles by the crystallization front, formation of new nonsuperconducting neutral nanoparticles suitable for effective pinning, optimization of YBCO crystal growth with additives.
    • Control of crack formation during oxygenation of the 123 single-crystalline composite, including the analytical description of stress development during oxygenation, description of oxygenation mechanism associated with cracking, optimization of oxygenation parameters to achieve requested crack pattern (structure) and modification of the sample geometry in respect to oxygenation process.
    • Influence of joining parameters on the quality of joints. Mainly the influence of mutual orientation of joined crystals, their microstructure, applied joining solder and temperature parameters of joining on the microstructure and superconducting properties of the joint are investigated.

The group has been engaged in a broad international cooperation with the laboratories participating in the EU projects SCENET, EFFORT and  NESPA ( ATI Vienna, IPHT Jena, IEW Dresden, IRC in Superconductivity Cambridge, ICMAB Barcelona and CRETA Grenoble).

Contact
Name: 
Pavel Diko
Address: 

Group of Ceramic Superconductors and Nanomaterials
Institute of Experimental Physics
Slovak Academy of Sciences
Watsonova 47, 04001 Košice, Slovakia

Phone: 
+421 55 7922243
Fax: 
+421 55 6336292

Institute of Experimental Physics, Košice Centre of Low Temperature Physics

Main Activity: 

Fundamental research at ultra low temperatures and high magnetic fields of superfluid helium-3, strongly correlated electron systems and novel superconductors

Contact
Name: 
Peter Samuely
Address: 

Institute of Experimental Physics
Slovak Academy of Sciences
Centre of Low Temperature Physics
04001 Košice
Slovakia

Phone: 
+421-55-6228158
Fax: 
+421-55-6228158
Category: 
Category 1.0 - Physics of Superconductivity
Category 2.0 - Basic Materials Research into Superconductors
Category 3.0 - Bulk Superconductors
Category 4.0 - Superconducting Electronics (small-scale applications)
Category 5.0 - Conductors and Cables
Category 6.0 - Large Scale Applications of Superconductivity
Category 11.0 - Cryogenics (including refrigerators)
Class: 
Class 2 - Research Organizations
Country: 
Slovakia
Last Updated Date: 
February, 2010
Last modified: 
Thursday, March 12, 2015 - 16:37