Title :
Preparation and magnetic properties of Ba/sub 1-x/K/sub x/BiO/sub 3+y/ and YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// single crystal films
Author :
Barilo, S. ; Shiryaev, S. ; Bychkov, G. ; Gatalskaya, V. ; Orlova, N. ; Pushcarev, A. ; Shestac, A. ; Zhigunov, D. ; Kaul, A. ; Svechnikov, V. ; Zandbergen, H.
Author_Institution :
Inst. of Solid-State & Semicond. Phys., Acad. of Sci., Minsk, Byelorussia
fDate :
6/1/1997 12:00:00 AM
Abstract :
Large area Ba/sub 1-x/K/sub x/BiO/sub 3+y/ and YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// films were grown by LPE techniques on (Ba,K)BiO/sub 3/ and NdGaO/sub 3/ substrates, respectively. The good quality of epitaxy and small crystal mosaicity of the films were confirmed by X-ray measurements. Chemical homogeneity and microstructure of the films and interfaces were investigated by SNMS, HREM and SEM, depending on growth parameters. A comparative study of magnetic hysteresis loops in the reversible (irreversible) regions were done for both types of films. The VSM data show that the irreversible line follows the flux creep model.
Keywords :
X-ray diffraction; barium compounds; crystal microstructure; electron microscopy; flux creep; high-temperature superconductors; liquid phase epitaxial growth; magnetic hysteresis; mass spectra; mosaic structure; potassium compounds; scanning electron microscopy; superconducting epitaxial layers; yttrium compounds; (Ba,K)BiO/sub 3/ substrate; (BaK)BiO/sub 3/; Ba/sub 1-x/K/sub x/BiO/sub 3+y/; HREM; LPE techniques; NdGaO/sub 3/; NdGaO/sub 3/ substrate; SEM; SNMS; X-ray measurements; YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta//; YBa/sub 2/Cu/sub 3/O/sub 7/; chemical homogeneity; epitaxy; flux creep model; growth parameters; interfaces; irreversible line; magnetic hysteresis loops; magnetic properties; microstructure; preparation; reversible region; single crystal films; small crystal mosaicity; Chemicals; Electrodes; Epitaxial growth; Magnetic films; Magnetic flux; Magnetic properties; Semiconductor films; Substrates; Temperature distribution; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
