Results:
Phase I results:
Phase entitled "The study of polycrystalline compounds ( superconductors and nitride thin films ) by electrical, magnetical, mechanical and chemical structure investigations" has three objectives, which were made by running the eight main activities.
The main achievements in this phase are:
The
obtained results integrate with the reported results in Europe and worldwide by
several research groups concerning the improvement and the pinning properties
of polycrystalline superconducting materials (University of Cambridge, Vienna
University of Technology, a IFW Dresden, ICMAB Barcelona) and large companies
seeking immediate implementation of technology applications (Siemens and
Nexans).
By
solid state reaction method we obtained the superconducting ceramic material
(30 samples) whose electrical and mechanical properties were improved
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Bi:2223 |
Bi:2212 target |
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Bi:2201 |
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Using
suitable stoichiometric conditions and controlled synthesis of compounds we
obtained single phase samples of Bi: 2201, Bi: 2212 and (Bi, Pb) 2223, whose
properties were improved by pressing and heat treatment.
Pressed
powder (Bi, Pb): 2223 before sintering leads to higher critical current density
due to the increasing strength of intergrain pinning.
Transport
measurements showed an increase in critical current density and mechanical
measurements have shown a hardness increase and a porosity decrease with
increasing compression pressure.
By
pressing and syntherizing at high temperatures, the electric and magnetic
properties of materials are improved.
SEM
measurements show that the samples obtained have a good quality due to higher
grain and partialy oriented.
Sintering
temperature leads to an increase in sample density.
Intergranular
critical current calculated from the experimental data of AC susceptibility on
Bean model has a conduct specific to intergranular junctions of type SNS.
It
was probed a simple method to control the deposition process of TiN layers by
reactive sputtering at low temperatures.
Were
obtained titanium nitride layers on silicon substrate and it was studied the
influence of deposition process parameters (nitrogen flow, bias voltage,
discharge current) on the microstructure and microhardness of layers.
Maximum
hardness of the TiN layers have been obtained slightly lower than those
reported by other authors (2200-2300 HV).
Phase II in 2008 entitled:
“Experimental developments for synthesis installations and for characterization of materials and development of a database for superconducting materials and nitride thin films ”
Results achieved in project
NR. CRT. |
Product name / technology / service / other category |
Status of the implementation **) |
Capitalization mode ***) |
INSTITUTIONS / user company / Vol benefit achieved ****) |
1 |
- Solid Oxidic Superconductor Compounds
- Thin films of nitrides with tribological applications
- Thin films with superconducting applications
- Magnetron sputtering plant reconfigured for deposition of thin films with tribological applications
- Magnetron sputtering plant reconfigured for deposition of thin films with superconducting applications |
- Experimental model
- Experimental model
- Experimental model
- Experimental model
- Experimental model
|
R – Made deployment
R – Made deployment
R – Made deployment
R – Made deployment
R – Made deployment |
Babes-Bolyai University, Cluj-Napoca
Technical University of Cluj-Napoca
National Institute for Research and Development for Isotopic and Molecular Technologies |
1 |
- Technology of thin films deposition for superconducting applications
- Technology of thin films deposition for tribological applications |
- Experimental model
- Experimental model |
R – Made deployment
R – Made deployment |
Babes-Bolyai University, Cluj-Napoca
Technical University of Cluj-Napoca National Institute for Research and Development for Isotopic and Molecular Technologies |
1 |
Reconfigured installation for measuring electrical resistance
System characterization of air plasma magnetron sputter deposition |
- Experimental model
-Experimental model |
R – Made deployment
R – Made deployment |
Babes-Bolyai University, Cluj-Napoca
Technical University of Cluj-Napoca |
ARTICLE TITLE / VOLUME TITLE / SCIENTIFIC COMMUNICATION TITLE |
Author's Name |
MAGAZINE *) / Volume / YEAR / PAGE / ISSN / ISBN / Publishing houses that appeared / Conference has been notified |
ARTICLES |
||
The influence of oxygen deficiency and the unbalance Bi/ Sr in Bi2Sr2CuO6+d on metal-insulator transition |
Pop Aurel , Matei Iulian |
Presented at the International Conference LT25 Amsterdam, August 6 to 13, 2008, P. 94-94 |
The influence of partial substitution of Ca by Sm on dissipation processes in (Bi1.6Pb0.4)(Sr1.8Ba0.2)(Ca1-xSmx)2Cu3Oy superconductor |
Pop Aurel , Marconi Sorin Daniel , Pop M. |
Presented at the International Conference Amsterdam, August 6 to 13, PB-Fr143 Abstract Book, 2008, p. 94-94 |
Low-field AC susceptibility study of the flux motion in Bi2Sr2CaCu2Oy thin films |
Pop Aurel , Matei Iulian |
International Conference on superconductivity and magnetism Side- Antalia , 2008, P. 308-308 |
Influence of the compacting pressure on the microstructure and structure of the polycrystalline (Bi- Pb )2Sr2Ca2Cu3Oy superconductors |
Pop Aurel , Stiufiuc Gabriela , Coldea Roxana-Monica |
International Conference Nanospec , Cluj Napoca 2008, P. 126-126 |
Structural properties and epitaxial growth mechanisms of nanoscale Bi2Sr2CaCu2oy thin films , |
Pop Aurel , Coldea Roxana-Monica , Manolache Silvia Magdalena , Pop M. , |
JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, 10, 4, 2008, P.919 - 921 |
Irreversibility processes from AC magnetic susceptibilities in ( Bi,Pb ):2223 HTS system doped by 3d elements , |
Pop Aurel , Marconi Sorin Daniel , Topan M.I. , Pop M |
JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, 10, 7, 2008, P.1866 - 1868 |
Study of localization processes in transport properties of Bi:2201 epitaxial thin film |
Marconi D. , Matei I., Manolache Silvia Magdalena , Lung Teofil-Claudiu , Pop Aurel |
JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, 10, 4, 2008, P.926 - 928 |
Phase III in 2009 entitled:
“Studies on metal-insulator transition and dissipative processes of epitaxial thin films of Bi: 2201 with nanoparticles and the characterization of plasma in the substrate”
Results achieved in project
NR. CRT. |
Product name / technology / service / other category |
Status of the implementation
|
Capitalization mode |
INSTITUTIONS / user company / Vol benefit achieved |
1 |
- Nitride thin films with tribological applications
- Nitride thin films with superconducting applications
-Facility for electric resistance measurement as a function of temperature
- Magnetron sputtering plant reconfigured for thin films deposition with superconductive applications |
- Experimental model
- Experimental model
- Experimental model
- Experimental model
|
R – Made deployment
R – Made deployment
R – Made deployment
R – Made deployment |
Babes-Bolyai University, Cluj-Napoca
Technical University of Cluj-Napoca
National Institute for Research and Development for Isotopic and Molecular Technologies |
1 |
- Technology for changing the concentration of mobile charge carriers in films of Bi: 2201
- Method for characterizing the plasma substrate |
- Experimental model
- Experimental model |
R – Made deployment
R – Made deployment |
Babes-Bolyai University, Cluj-Napoca
National Institute for Research and Development for Isotopic and Molecular Technologies
Technical University of Cluj-Napoca
|
ARTICLE TITLE / VOLUME TITLE / SCIENTIFIC COMMUNICATION TITLE |
Author's Name |
MAGAZINE *) / Volume / YEAR / PAGE / ISSN / ISBN / Publishing houses that appeared / Conference has been notified |
ARTICLES |
||
The study of re-entrant behavior in electrical resistance R(T) of Bi 2 Sr 2 Ca 2 (Cu 1-x Zn x ) 2 O 6+d (with x = 0.01) thin film |
I .Matei a ) , H.Raffy b ) , M.Pop c) , and A.V.Pop a , |
Presented at International Conference ROCAM Brasov , 25 to 28 August 2009, poster section |
Localization processes near the superconductor-insulator transition in Bi2Sr2-xLaxCuOy nanoscale thin films |
I. Matei, H. Raffy, A.V. Pop
|
Presented at International Conference ROCAM Brasov , 25 to 28 August 2009, oral section |
Low-field AC susceptibility study of the flux motion in Bi 2 Sr 2 CaCu 2 Oy thin films |
A.V.Pop 1*) , S.Manolache 1) , I.Matei 1) and V.Pop 2 |
Journal of Physics : Conference Series 150 (2009) 052214
|
The influence of oxygen deficiency and the unbalance Bi/ Sr in Bi 2 Sr 2 CuO 6+δ on metal- insulator transition |
A.V.Pop 1*) ,I.Matei 1) and V.Pop 2) |
Journal of Physics: Conference Series 150 (2009) 052214
|