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Fabrication of Oxide Superconducting Thin Films Using Colloid of Nanoparticles as Precursor

Chintamaneni, Vamsee K.

Abstract Details

2006, Master of Science in Engineering (MSEgr), Wright State University, Materials Science and Engineering.
This thesis reports the development of a new approach for the fabrication of superconducting thin films. Among the liquid phase methods of fabricating high temperature superconductors having critical current density about 1 MA/cm2, metalorganic deposition using metal trifluoroacetates (TFA-MOD) is the best known method. In this project, detailed spectroscopic and microscopic analysis was performed at every stage of the TFA-MOD process to understand the evolution of crystalline superconducting film. It was observed that the TFA-MOD has some inherent disadvantages such as long process time, evolution of HF gas and results porosity in films. A new liquid phase process was developed to fabricate superconducting YBCO thin films, which has the potential to overcome the above mentioned drawbacks. This process involves using a precursor, which is a colloidal suspension of Y-Ba-Cu-O nanoparticles of size ~ 20 nm. Precursor films were deposited on LaAlO3 by spin coating or dip coating and heat treated in two stage annealing process to obtain final films. Compared to MOD-TFA processed films, the nanoparticle processed films showed lower porosity and can be grown at faster heating rates. The superconducting transition temperature of nanoparticle processed YBCO films to date is ~ 89 K at R=0. Self-field critical current densities (Jc) of 2 MA/cm2 at 77 K have been achieved.
Sharmila Mukhopadhyay (Advisor)
104 p.

Recommended Citations

Citations

  • Chintamaneni, V. K. (2006). Fabrication of Oxide Superconducting Thin Films Using Colloid of Nanoparticles as Precursor [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1153167303

    APA Style (7th edition)

  • Chintamaneni, Vamsee. Fabrication of Oxide Superconducting Thin Films Using Colloid of Nanoparticles as Precursor. 2006. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1153167303.

    MLA Style (8th edition)

  • Chintamaneni, Vamsee. "Fabrication of Oxide Superconducting Thin Films Using Colloid of Nanoparticles as Precursor." Master's thesis, Wright State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=wright1153167303

    Chicago Manual of Style (17th edition)