Vyacheslav F. Solovyov

Address:

Brookhaven National Laboratory, Department of Materials Science, Upton NY, 11973

Telephone:

1-631-344-5437

e-mail:

solov@bnl.gov

FAX:

1-631-344-4071

 

Summary

I have been working in the field of applied superconductivity for 12 years. In my career I have been involved in two major research projects: (i) 1989-1997, study of transport flux-line lattice properties in perfect Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O single crystals and (ii) 1997-present, research of growth and nucleation of multi-micron thick Y-Ba-Cu-O epitaxial layers by ex-situ technique. My area of expertise is crystallization and growth of high-temperature superconductors, physics and chemistry of epitaxy, physics of flux-line lattice in superconductors.

Education and academic degrees:

07.1995

Ph.D. in Physics, Institute for Metal Physics, Kiev, Ukraine. Candidate of Sciences in Physics and Mathematics (Ph.D. equivalent). Doctoral dissertation: "Anisotropic flux dynamics in YBa2Cu3O7 single crystals". Advisor: Prof. Vladimir M. Pan

06.1989

MS in Physics, Moscow Institute for Physics and Technology, Moscow, Russia. Faculty of Problems of Physics and Energy. MS Degree in Physics, Automatics and Electronics. Thesis: "Electrical and ultrasonic properties of YBa2Cu3O7 single crystals". Advisor: Prof. Vladimir M. Pan

06.1986

BS in Physics, Moscow Institute for Physics and Technology, Moscow, Russia. BS Degree in Physics and Mathematics Faculty of Problems of Physics and Energy.

 

Research experience:

01.2001-present

Assistant Scientist, Department of Materials Science, Brookhaven National Laboratory.

Research project: Development of atmospheric ex-situ deposition technique based on fluorination of inorganic precursor layers. Study of fluorination kinetics and influence of fluorination degree upon growth and nucleation of multi-micron thick YBa2Cu3O7 layers.

My accomplishments: Designed thermal pyrolisis ultrasonic deposition system. Achieved high critical currents for 1-micron thick films prepared by new thermal pyrolysis ex-situ technique. Established rates of fluorination by R-134 gas at 600 oC for films of various thicknesses.

11.1999-01.2001

Senior Research Associate, Materials Science Division, Department of Applied Science, Brookhaven National Laboratory.

Research project: Study of the ex-situ reaction kinetics and influence of the processing parameters on the reaction rate. Development of reduced pressure ex-situ reactor of high capacity for batch processing of large area films and coated tapes. Numeric simulation of HF flow patterns in the ex-situ reactor layers. Development of software for X-ray diffractometry of epitaxial layers of YBa2Cu3O7.

My accomplishments: Established dependence of the growth rate on absolute pressure. I have shown that this dependence is a result of growth rate limitation by gaseous diffusion of reaction product HF. Numeric simulations confirmed the model. US patent applied for the sub-atmospheric reactor. Developed C++ based software for texture analysis of YBCO layers using Blake Industries goniometer.

04.1997-11.1999

Visiting scientist, Materials Science Division, Department of Applied Science, Brookhaven National Laboratory.

Research project: Design of vacuum deposition system and atmospheric annealing station for preparation and growth of Y-Ba-Cu-O layers by ex-situ technique. Study of growth kinetics under atmospheric conditions. Growth of 5-micron thick epitaxial layers of Y-Ba-Cu-O on single-crystalline and metallic buffered substrates. Development of in-situ growth rate detection technique. Design of automation software for computerized deposition and heat-treatment control.

My accomplishments: In collaboration with Dr. H Wiesmann designed vacuum deposition system for Y-BaF2-Cu precursor deposition. Achieved record critical current for 5-micron thick films. Found that the ex-situ reaction is limited by HF removal and that the partial pressure of HF in equilibrium relation with water vapor partial pressure. Developed C++ based software for the heat treatment control.

03.1995-04.1997

Scientific Collaborator, Department of Superconductivity, Kiev Institute for Metal Physics, Kiev, Ukraine.

Research project: Study of transport flux-line lattice properties in wide range of magnetic fields and temperatures. Transport measurements of flux-line lattice anisotropy in perfect Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O single crystals.

My accomplishments: Developed a concept of dynamic dimensional crossover, which explained change in the current-voltage characteristic behavior. Demonstrated decoupling of the flux line lattice on Bi-Sr-Ca-Cu-O single crystals using high current transport measurements.

06.1989-04.1995

Research associate, Department of Superconductivity, Kiev Institute for Metal Physics, Kiev, Ukraine.

Research project: Design and construction of crystallization station for growth of high-quality YBCO single crystals. Growth and characterization of Y-Ba-Cu-O single crystals. Design of high-current pulse transport critical current measurement technique.

My accomplishments: Designed and built a crystallization station for growth of high-quality YBCO single crystals. Obtained high quality single crystals with high critical temperature. Developed an electronic device for pulse measurements of the transport critical current in single crystals. Determined role of twin planes as pinning-suppressing centers in YBCO single crystals.

 

Honors and awards:

09.2001

Bookhaven National Laboratory patent award.

06.1989

Diploma of graduation with distinction,Moscow Institute of Physics and Technology.

06.1986

Fellowship for outstanding undergraduate students, Moscow Institute of Physics and Technology.

 

Technical skills:

Synthesis of materials: operation of high-vacuum equipment; leak checking of vacuum equipment; electron-beam, thermal, magnetron thin film deposition; thermal pyrolysis; flux and floating zone crystal growth.

Analytical techniques: cryogenic measurements in high external magnetic fields; X-ray diffractometry using both powder diffractometer and four-circle goniometer; mass-spectrometry of gases; profilometry of thin films; optical and electron microscopy; composition analysis using microprobe and X-ray fluorescence.

Computer skills: MS C++, LabView, HTML, Basic.

Electronics: low-noise amplifiers; high-voltage (up to 50 kV) power supplies and electronics; computer interfacing using GPIB, CAMAC, RS-232; CAD systems.

 

Conference presentations:

 

Patents:

Patent application "Synthesis of YBa2Cu3O7 using sub-atmospheric pressure". Patent applied on 09.12.2001, Serial No. 09/950,888.

List of selected publications with PDF downloads:

  1. Applied Physics Letters, vol. 80, No 3 (January 2002), pp. 419-421, "Mechanisms for hetero-epitaxial nucleation of YBa2Cu3O~6.1 at the buried precursor/SrTiO3 interface in the postdeposition reaction process", L. Wu, V. F. Solovyov, H. J. Wiesmann, Y. Zhu, and M. Suenaga. PDF(183 KB)
  2. Physica C, vol. 353, No 1&2, (May 2001), pp. 269-274, "Growth rate limiting mechanisms of YBa2Cu3O7 films manufactured by ex-situ processing", V.F. Solovyov, H.J. Wiesmann, and M. Suenaga. PDF (122 KB)
  3. Journal of Materials Research, vol. 16, No 10 (October 2001), pp. 2869-2884, "Nucleation and growth of YBa2Cu3O7 on SrTiO3 and CeO2 by a BaF2 postdeposition reaction process", L. Wu, Y. Zhu, V.F. Solovyov, H.J. Wiesmann, A.R. Moodenbaugh, R.L. Sabatini, and M. Suenaga.
  4. IEEE Transactions on Applied Superconductivity, vol. 11, No 1, (March 2001), pp. 2939-2942, "Ex-situ post-deposition processing for large area YBCO films and coated tapes", V. F. Solovyov, H. J. Wiesmann, L-J. Wu, Y. Zhu, and M. Suenaga. PDF (379 KB)
  5. Applied Physics Letters, vol. 76, No 14, (April 2000), pp. 1911-1913, "Kinetics of YBa2Cu3O7 film growth by postdeposition processing", Vyacheslav F. Solovyov, Harold J. Wiesmann, Li-jun Wu, Yimei Zhu, and Masaki Suenaga. PDF(147 KB)
  6. Supercond. Sci. Technol. vol. 11, (1998) pp. 935940, "Vortex decoupling line and its anisotropy in Bi2Sr2CaCu2O8+x single crystals observed by Jc( H; T;d) transport current measurements", V F Solovyov, V M Pan, H C Freyhardt, M H Ionescu and S X Dou. PDF(180 KB)
  7. Physica C, vol. 309, Nos 3&4, (December 1997) pp. 269-274."Thick YBa2Cu3O7 Films by Post Annealing of the Precursor by High Rate e-beam Deposition on SrTiO3 Substrates", V.F. Solovyov, H.J. Wiesmann, L-J. Wu, M. Suenaga and R. Feenstra. PDF(138 KB)
  8. Physica C, vol.279, Nos 1&2, (May 1997) pp. 18-30, "Dimensional crossovers and related flux line-lattice states in YBa2Cu3O7-d ", V.M. Pan, V.F. Solovjov and H.C. Freyhardt. PDF(930 KB)
  9. Physical Review B, vol. 50, No18, (November 1994) pp.13724-13734, "Anisotropic flux dynamics in single-crystalline and melt-textured YBa2Cu3O7- d", V. F. Solovjov, V. M. Pan, and H. C. Freyhardt. PDF(1.0 MB)

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