Transmission Electron microscopy and atomic force microscopy observation of air-processed GdBa2Cu3O7-δ superconductors doped with metal oxide nanoparticles (Metal = Zr, Zn, and Sn)

Caixuan Xu, Anming Hu, Masaki Ichihara, Mitsuru Izumi, Yan Xu, Naomichi Sakai, Izumi Hirabayashi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Single-domain, c-axis-oriented 30-rnrn-diameter GdBa2Cu 3O7-δ (Gd123) melt-textured bulk superconductors have been successfully grown by the top-seeded melt growth method from precursors of Gd123, Gd2BaCuO5, and Ag2O in air with doping of nanosized ZrO2, ZnO, or SnO2. Transmission electron microscopy (TEM) unveils a large amount of BaZrO3 or BaSnO3 particles with an average diameter of approximately 50 nm respectively embedded in ZrO2 or SnO2 doped samples, while no Zn-rich nanoparticles are observed in the ZnO-doped samples. The critical temperature Tc is almost unchanged up to a doping amount of 10 mol% tor ZrO2- or SnO2-doped Gd123 melt-textured bulks, while ZnO-doped Gd123 becomes non-superconductive at this doping level. By atomic force microscopy (AFM), nanostripes with a wavelength of 15nm are observed in the ZnO-doped Gd123 sample. Nanoscale particles in the grown Gd123 single domain, together with the micro-defects induced by nanoparticle doping, can account for the enhanced superconducting properties.

Original languageEnglish
Article number023002
JournalJapanese Journal of Applied Physics
Volume48
Issue number2
DOIs
Publication statusPublished - 2009 Feb 1
Externally publishedYes

Fingerprint

Metal nanoparticles
Superconducting materials
metal oxides
Atomic force microscopy
Doping (additives)
atomic force microscopy
Transmission electron microscopy
nanoparticles
transmission electron microscopy
Oxides
air
Air
Metals
metals
Nanoparticles
critical temperature
Wavelength
Defects
defects
wavelengths

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Transmission Electron microscopy and atomic force microscopy observation of air-processed GdBa2Cu3O7-δ superconductors doped with metal oxide nanoparticles (Metal = Zr, Zn, and Sn). / Xu, Caixuan; Hu, Anming; Ichihara, Masaki; Izumi, Mitsuru; Xu, Yan; Sakai, Naomichi; Hirabayashi, Izumi.

In: Japanese Journal of Applied Physics, Vol. 48, No. 2, 023002, 01.02.2009.

Research output: Contribution to journalArticle

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