Stages:

Stage I

The study of polycrystalline compounds ( superconductors and nitride thin films) by electrical, magnetical, mechanical and chemical structure investigations.

Stage II

Experimental developments for synthesis installations and for characterization of materials and development of a database for superconducting materials and nitride thin films

Stage III

Studies on metal-insulator transition and dissipative processes of epitaxial thin films of Bi: 2201 with nanoparticles

Stage IV

Studies of the effect of nanoparticles and nanodefects on the physical properties of  Bi: 2212 thin films

Stage V

Studies of the effect of nanoparticles and nanodefects on the physical properties of  Bi: 2212 thin films and nitrides thin films

  

Activities:

 Stage I

The study of polycrystalline compounds ( superconductors and nitride thin films ) by electrical, magnetical, mechanical and chemical structure investigations.

Activities : A I.1. (CO, P1,P2) Updating the bibliography. Formation of a bibliographic database (pdf); A I.2 (CO,P1) Preliminary results on synthesized materials; A I.3 (CO,P1) Synthesis by solid state reaction of superconducting compounds; A I.4 (CO,P1) The effect of heat treatments and uniaxial pressure on the critical current density; A.I.5 (CO) Measurements of electrical resistivity depending on temperature; A I. 6 (CO) Study of intergranular dissipative processes from ac susceptibility measurements as a function of temperature and magnetic field amplitude; A I.7 (CO,P2) Updating bibliographic information on the characterization of investigated superconductors by ESR ; A I. 8 (CO,P1 ) Publishing, disseminating results

 

Stage II

Experimental developments for synthesis installations and for characterization of materials and development of a database for superconducting materials and nitride thin films

Activities : A II.1 (P2) Preliminary ESR measurements on paramagnetic impurities present in SC polycrystallines, electron spin resonance studies (ESR); A.II.2 (CO,P1) Preliminary results on the characterization of materials obtained after re-synthesis systems; A II.3 (CO,P1) Reconfiguration of magnetron sputtering facilities to obtain thin layers; A.II.4 (P1 ) Making coil and Langmuir probe to characterize the plasma in order to obtain nanostructured nitride thin films; AII. 5(CO) Characterization of the purity of samples by X-ray diffraction measurements; A II.6 (CO) Reconfiguration of the measuring system of electrical resistance of the superconducting thin layers; A.II.7 (P1) Synthesis of nitride thin films  in the systems Ti-N and Ti-Si-N ; A II. 8 (P1) Microstructure characterization by analysis and surface morphology of nitrides by SEM, AFM; AII.9 (P1) Chemical analysis at the microscope level with microprobe with EDS; A.II.10(CO, P2)  X-ray structural determinations on nitride thin films ; AII.11.(P1) Determination of the mechanical characteristics of the nitride thin films ; A II 12. (CO,P1,P2) Publication, dissemination.

 

Stage III

Studies on metal-insulator transition and dissipative processes of epitaxial thin films of Bi: 2201 with nanoparticles

Activities : A III.1 (CO,P1) Synthesis by DC magnetron sputtering method of nanostructured Bi:2201 on SrTiO3 substrate ; A III.2 (CO, P2)   X-ray diffraction measurements; A III.3 (P1) Electron microscopy measurements; A III.4 (CO) Measurements of electrical resistance depending on temperature; A III.5 (P2) ESR resonance spectroscopy measurements in order to characterize nanostructures SC; A III.6 (P1) Surface morphology characterization by AFM measurements; A III.7 (P1) Characterization of the substrate plasma; A.III.8 (CO) Characterization of nanostructures ; A III.9 (CO-P2) Publication, dissemination.

 

Stage IV

Studies of the effect of nanoparticles and nanodefects on the physical properties of  Bi: 2212 thin films

Activities : A IV.1 (P2) ESR resonance spectroscopy measurements in order to characterize nanostructures SC ; A IV2 (CO) X-ray diffraction measurements; A.IV 3 (P1) Characterization of plasma in the substrate layers in order to obtain nanostructured nitrides

   

Stage V

Studies of the effect of nanoparticles and nanodefects on the physical properties of  Bi: 2212 thin films and nitrides thin films

Activities : A IV.1 (CO; P1) Synthesis of DC magnetron sputtering method to nanostructured Bi:SrTiO3 in 2212 on substrate ; A IV.2 (P2) ESR resonance spectroscopy measurements in order to characterize nanostructures superconducting Bi: 2212; A IV.3 (P2) X-ray diffraction measurements over layers of the Bi: 2212; A IV.4 (P1) Electron microscopy measurements over layers of Bi: 2212; AIV.5 (CO) Measurements of magnetic susceptibility in alternating field; A IV.6 (P2) The study by ESR of spin dynamics in superconducting Bi: 2212 with Gd ions; A IV.7 (CO-P2) Publication, dissemination; A IV.8 (P1) Synthesis of nitrides layers on Ti-N systems and Ti-Si-N with nanometric structure; A IV.9. (CO, P1, P2) Characterization of nanostructured nitride thin films by X-ray diffraction, ESR spectroscopy and SEM; A IV.10. (P1) Study the behavior of used nitrides layers; A. IV.11. (P1) Study the behavior of corroded nitrides layers; A. IV, 12 (CS-P2) Publish, disseminate 

  

Events in the project:

Stage 1 (2007)

• Conferences in 2007

Some results were communicated by three contributions presented at two conferences (one national and one international), as follows: 

a)       Study on corrosion behavior of layers of titanium and chromium nitrides obtained by sputtering

 

  by Gavril Negrea, Aurel Pop, Dorina Mihut

            -Presented at the IInd National Conference on Corrosion and Corrosion Protection, 26-28 10.2007, Piatra Fantanele, Bistrita.

 

       b) Analysis by X-ray diffraction and electron microscopy of zinc layers obtained by nanoscale codeposition

               by Cassius BULEA, Gavril NEGREA, Aurel POP

            -Presented at the IInd National Conference on Corrosion and Corrosion Protection, 26-28 10.2007, Piatra Fantanele, Bistrita. 

        c) Effect of partial substitution of Ca by La on intergranular processes in ( Bi , Pb ):2223   superconductors by A.V.Pop , I.Matei and M. Pop

International Conference of Fundamental Science, 9-10 Nov.2007, Baile Felix.

 

  • Seminars

• Deposition of superconducting thin layers by DC magnetron sputtering method: discussion of preliminary results (November 2007)

Prof. Dr. Aurel Pop CO, UBB

• Mechanical properties of nitride thin films (December 2007)

Conf. Dr. Ing. Negrea Gavril, P1 UT Cluj

  • Meetings of partners

•  5-10-2007 Planning of activities for 2007

•  7-12-2007 Reporting results

 

Stage 2 (2008)

• Seminars

• Substrate temperature control methods and sputtering gas pressure for deposition of thin layers

Drd. Marconi Daniel and Drd. Matei Iulian (15-02-2008)

•    Examine the ways to reconfigure magnetron sputtering facilities in order to obtain superconducting thin layers, nitride thin films, respectively.

Prof. Dr. Aurel Pop, Conf. Dr. Iosif Deac, Conf. Dr. Ing. Negrea Gavril (18-04-2008)

S3) Superconducting thin films and nitrides: necessary properties for their usage in practical applications (11-06-2008)

Prof. Dr. Aurel Pop, CPI Dr. Liviu Giurgiu, Conf. Dr. Ing. Gavril Negrea, Dr. Claudiu Lung

 

• Meetings of partners

•  25-01-2008 Planning of joint activities for partners

•  18-04-Participation at seminar and discussion of some preliminary results regarding the reconfiguration of the synthesis and measurement facilities

•  11-06-2008 Participation in the seminar and discussion of experimental results obtained by ESR measurements and SEM.

•  11-07-2008 Meeting to present the future papers presented at international congresses and conferences 

 

 

Stage 3 (2009)

• Conferences in 2009

Romanian Conference on Advanced Materials, ROCAM 2009 – Brasov 25-28 August 2009

-  Two papers presented

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, 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, poster section

 

 ISI published papers

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

 

 

  Seminars

• Interface method of cooling in order to increase the accuracy of measurements of electrical resistivity in thin superconducting layers

Drd. Marconi Daniel and Drd. Matei Iulian (17-04-2009)

•    Magnetron parameters which influence the tribological properties of nitrides layers.

Conf. Dr. Ing. Negrea Gavril, Prof. Dr. Aurel Pop, Conf. Dr. Iosif Deac, (18-06-2009)

S3) Analysis of experimental development activities in the 3rd phase of the project.

Prof. Dr. Aurel Pop, CSIII Dr. Oana Raita, Conf. Dr. Ing. Gavril Negrea, Dr. Claudiu Lung (01-09-2009)

 

Meetings of partners

•  26-01-2009 Planning of joint activities for partners

•  17-04-2009 Participation in the seminar and discussion of some preliminary results regarding the reconfiguration of measurement facilities

•  18-06-2009 Participation in the seminar and discuss experimental results obtained by electrical resistance measurements and AFM. Presentation of future papers presented at international congresses and conferences.