Ahead of Print article · Journal article
Jc enhancement by La-Al-O doping in Y-Ba-Cu-O films both in self-field and under magnetic field
To enhance the Jc of YBa2Cu3O7−X (YBCO) films both in self-field and under magnetic field, an effective strategy is to introduce artificial pinning centers and keep a good YBCO matrix at the same time. Here, we propose a new dopant: LaAlO3 (LAO), based on its chemical stability and small mismatch toward YBCO.
A series of YBCO films with different LAO doping contents was fabricated on LAO single-crystal substrates by metal organic deposition. We observed by X-ray diffractometer measurements and scanning electron microscopy observations that although a large amount of LAO is added, YBCO still keeps a good epitaxial growth relationship with LAO.
Compared with a pure YBCO film, the Jc value of a 5.0% LAO-doped sample is enhanced more than three times in self-field 77 K and seven times at 77 K and 1.5 T, respectively. These results indicate that LAO doping can effectively enhance the Jc of YBCO films both in self-field and in applied magnetic fields.
Language: | English |
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Publisher: | IEEE |
Year: | 2016 |
Pages: | 1-1 |
ISSN: | 23787074 , 10518223 and 15582515 |
Types: | Ahead of Print article and Journal article |
DOI: | 10.1109/TASC.2016.2536805 |
ORCIDs: | Grivel, Jean-Claude |
LAO doping content LAO single-crystal substrate Magnetic resonance imaging Strain Substrates Superconducting magnets X-ray diffraction X-ray diffractometer X-ray scattering YBCO films YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-X</sub>:LaAlO<sub>3</sub> Yttrium barium copper oxide artificial pinning centers barium compounds chemical stability doping epitaxial growth epitaxial growth relationship high-temperature superconductors lanthanum compounds metal organic deposition nanoparticle pinning centers scanning electron microscopy superconducting epitaxial layers yttrium compounds