Abstract
By using atomic force microscopy (AFM) and scanning tunnelling microscopy (STM) at ambient conditions, we have investigated the topographies of various surfaces of bulk samples of YBa2Cu3Ox (YBCO), SmBa2Cu3Ox- (SmBCO), and (Sm,Eu,Gd)Ba 2Cu3Ox (SEG) oxidic high-Tc superconductors. We find that the last two systems exhibit microstructures on the nanometer scale which are remarkably different from those obtained in the YBCO system. The stripe-like growth structures observed in our topography measurements may be the key for the considerable improvements concerning the critical current densities especially at high magnetic fields and elevated operating temperature (77 K). The properties of the microstructures are discussed in detail.
Original language | English |
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Pages (from-to) | 2259-2263 |
Number of pages | 5 |
Journal | Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers |
Volume | 45 |
Issue number | 3 B |
DOIs | |
Publication status | Published - 2006 Mar 27 |
Externally published | Yes |
Keywords
- AFM
- Aging
- Composition modulation
- High-T superconductors
- Nanostripes
- Oxides
- STM
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)