| Issue |
Eur. Phys. J. AP
Volume 5, Number 1, January 1999
|
|
|---|---|---|
| Page(s) | 3 - 8 | |
| DOI | https://doi.org/10.1051/epjap:1999100 | |
| Published online | 15 January 1999 | |
https://doi.org/10.1051/epjap:1999100
Suppression of the “notch effect” in microwave surface resistance in YBa2Cu3O7 films on MgO (100) substrate by deposition of ultra-thin SrTiO3 seed layers
1
Unité Mixte de Physique CNRS / Thomson-CSF, 91404 Orsay, France
2
LCR / Thomson-CSF, 91404 Orsay, France
Received:
28
May
1998
Revised:
30
September
1998
Accepted:
1
October
1998
Published online: 15 January 1999
RHEED controlled ultra-thin buffer layers of SrTiO3 have been deposited on (100) MgO by pulsed laser deposition to growth YBaCuO films for microwave applications. A buffer layer with a thickness between 2 and 15 nm, i.e. 5 to 40 unit cells of SrTiO3, is sufficient to expand to more than 60 °C the range of deposition temperatures leading to low microwave surface resistance. The Rs values are as good as those obtained on LaAlO3 substrates with a slighly lower magnetic field dependency. The SrTiO3 seed layer induces an oriented epitaxial growth with YBCO [100] // MgO [100] over this range of deposition temperatures.
PACS: 74.75 – Superconductor films / 81.15.i – Pulsed laser deposition / 74.70.v – Perovskite phase superconductors / 74.30.g – Superconductor response to electromagnetic fields
© EDP Sciences, 1999
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