Abstract
The growth mechanism of a-axis oriented YBCO thin films has been studied by TEM. At 650degC, a disordered cubic perovskite is first formed with a[sub p]parallela[sub MgO], then a strained tetragonal a-axis oriented perovskite is observed, with c=3a[sub p], slightly misoriented with respect to MgO and showing a marquetry-like contrast. At 750degC, a [1anti 10] axis oriented perovskite is formed whose lattice exhibits a rotation with respect to MgO lattice, but also a tilting of the [CuO[sub 2]][infinity] layers with respect to the substrate plane. Introduction of oxygen at this temperature leads to an a-axis oriented orthorhombic perovskite and involves the formation of a poorly crystallized interface layer. The almost perfect a-axis orientation is achieved after slow cooling (30') down to room temperature, the lattice of the ''123'' phase being disoriented with respect to the MgO lattice. (orig.).
Hamet, J F;
Mercey, B;
Hervieu, M;
Poullain, G;
Raveau, B
[1]
- Centre de Materiaux Supraconducteurs, CRISMAT-ISMRa, 14 - Caen (France)
Citation Formats
Hamet, J F, Mercey, B, Hervieu, M, Poullain, G, and Raveau, B.
A-axis oriented superconductive YBCO thin films. Growth mechanism on MgO substrate. [Y-Ba-Cu-O].
Netherlands: N. p.,
1992.
Web.
doi:10.1016/0921-4534(92)90204-P.
Hamet, J F, Mercey, B, Hervieu, M, Poullain, G, & Raveau, B.
A-axis oriented superconductive YBCO thin films. Growth mechanism on MgO substrate. [Y-Ba-Cu-O].
Netherlands.
https://doi.org/10.1016/0921-4534(92)90204-P
Hamet, J F, Mercey, B, Hervieu, M, Poullain, G, and Raveau, B.
1992.
"A-axis oriented superconductive YBCO thin films. Growth mechanism on MgO substrate. [Y-Ba-Cu-O]."
Netherlands.
https://doi.org/10.1016/0921-4534(92)90204-P.
@misc{etde_7001602,
title = {A-axis oriented superconductive YBCO thin films. Growth mechanism on MgO substrate. [Y-Ba-Cu-O]}
author = {Hamet, J F, Mercey, B, Hervieu, M, Poullain, G, and Raveau, B}
abstractNote = {The growth mechanism of a-axis oriented YBCO thin films has been studied by TEM. At 650degC, a disordered cubic perovskite is first formed with a[sub p]parallela[sub MgO], then a strained tetragonal a-axis oriented perovskite is observed, with c=3a[sub p], slightly misoriented with respect to MgO and showing a marquetry-like contrast. At 750degC, a [1anti 10] axis oriented perovskite is formed whose lattice exhibits a rotation with respect to MgO lattice, but also a tilting of the [CuO[sub 2]][infinity] layers with respect to the substrate plane. Introduction of oxygen at this temperature leads to an a-axis oriented orthorhombic perovskite and involves the formation of a poorly crystallized interface layer. The almost perfect a-axis orientation is achieved after slow cooling (30') down to room temperature, the lattice of the ''123'' phase being disoriented with respect to the MgO lattice. (orig.).}
doi = {10.1016/0921-4534(92)90204-P}
journal = []
volume = {198:3/4}
journal type = {AC}
place = {Netherlands}
year = {1992}
month = {Aug}
}
title = {A-axis oriented superconductive YBCO thin films. Growth mechanism on MgO substrate. [Y-Ba-Cu-O]}
author = {Hamet, J F, Mercey, B, Hervieu, M, Poullain, G, and Raveau, B}
abstractNote = {The growth mechanism of a-axis oriented YBCO thin films has been studied by TEM. At 650degC, a disordered cubic perovskite is first formed with a[sub p]parallela[sub MgO], then a strained tetragonal a-axis oriented perovskite is observed, with c=3a[sub p], slightly misoriented with respect to MgO and showing a marquetry-like contrast. At 750degC, a [1anti 10] axis oriented perovskite is formed whose lattice exhibits a rotation with respect to MgO lattice, but also a tilting of the [CuO[sub 2]][infinity] layers with respect to the substrate plane. Introduction of oxygen at this temperature leads to an a-axis oriented orthorhombic perovskite and involves the formation of a poorly crystallized interface layer. The almost perfect a-axis orientation is achieved after slow cooling (30') down to room temperature, the lattice of the ''123'' phase being disoriented with respect to the MgO lattice. (orig.).}
doi = {10.1016/0921-4534(92)90204-P}
journal = []
volume = {198:3/4}
journal type = {AC}
place = {Netherlands}
year = {1992}
month = {Aug}
}