Comparison Study of YBa2Cu3O7-x Films Deposited by Using Various Carboxylate Solutions

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In this work, four fluorine-free solutions based on various carboxylates (propionates, butyrates, valerates, and hexanoates, respectively) were prepared and used for deposition of YBCO films on LaAlO3 single-crystal substrates, in order to further understand the role of precursors on properties of the final films. After the same pyrolysis and sintering processes, the films from propionates and butyrates show pure YBCO phase and were epitaxially grown, as determined by X-ray diffractometer analysis. There are clear differences in morphologies of these four films, i.e., the films from propionates and butyrates exhibit platelike grains without distinct grain boundaries, while almost randomly orientated grains were observed on the surface of the other two films. As a result, we noticed significant discrepancies on their superconducting performance. The films from propionates and butyrates give Jc values (at 77 K, self-field) of 2.1 MA/cm2 and 1.3 MA/cm2, respectively, while no superconducting transition above 70 K was observed in the other two films. A relatively larger amount of carbonaceous residue left as a by-product after decomposition of carboxylates with longer ligands, particularly under fast pyrolysis and sintering processes, could be one of the explanations of the poor superconductivity in the films from the valerateand hexanoate-based precursors.
Original languageEnglish
JournalIEEE Transactions on Applied Superconductivity
Volume25
Issue number3
Pages (from-to)6600204
Number of pages4
ISSN1051-8223
DOIs
Publication statusPublished - 2015

Keywords

  • Carboxylate
  • Chemical solution method
  • Epitaxial growth
  • Fluorine-free
  • Thin films

Cite this

@article{279ffd6b34ec412e99c2549c5baa07ea,
title = "Comparison Study of YBa2Cu3O7-x Films Deposited by Using Various Carboxylate Solutions",
abstract = "In this work, four fluorine-free solutions based on various carboxylates (propionates, butyrates, valerates, and hexanoates, respectively) were prepared and used for deposition of YBCO films on LaAlO3 single-crystal substrates, in order to further understand the role of precursors on properties of the final films. After the same pyrolysis and sintering processes, the films from propionates and butyrates show pure YBCO phase and were epitaxially grown, as determined by X-ray diffractometer analysis. There are clear differences in morphologies of these four films, i.e., the films from propionates and butyrates exhibit platelike grains without distinct grain boundaries, while almost randomly orientated grains were observed on the surface of the other two films. As a result, we noticed significant discrepancies on their superconducting performance. The films from propionates and butyrates give Jc values (at 77 K, self-field) of 2.1 MA/cm2 and 1.3 MA/cm2, respectively, while no superconducting transition above 70 K was observed in the other two films. A relatively larger amount of carbonaceous residue left as a by-product after decomposition of carboxylates with longer ligands, particularly under fast pyrolysis and sintering processes, could be one of the explanations of the poor superconductivity in the films from the valerateand hexanoate-based precursors.",
keywords = "Carboxylate, Chemical solution method, Epitaxial growth, Fluorine-free, Thin films",
author = "Zhao Yue and P. Torres and Poul Norby and Wulff, {Anders Christian} and Jean-Claude Grivel",
year = "2015",
doi = "10.1109/TASC.2014.2360151",
language = "English",
volume = "25",
pages = "6600204",
journal = "I E E E Transactions on Applied Superconductivity",
issn = "1051-8223",
publisher = "Institute of Electrical and Electronics Engineers",
number = "3",

}

Comparison Study of YBa2Cu3O7-x Films Deposited by Using Various Carboxylate Solutions. / Yue, Zhao; Torres, P.; Norby, Poul; Wulff, Anders Christian; Grivel, Jean-Claude.

In: IEEE Transactions on Applied Superconductivity, Vol. 25, No. 3, 2015, p. 6600204.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Comparison Study of YBa2Cu3O7-x Films Deposited by Using Various Carboxylate Solutions

AU - Yue, Zhao

AU - Torres, P.

AU - Norby, Poul

AU - Wulff, Anders Christian

AU - Grivel, Jean-Claude

PY - 2015

Y1 - 2015

N2 - In this work, four fluorine-free solutions based on various carboxylates (propionates, butyrates, valerates, and hexanoates, respectively) were prepared and used for deposition of YBCO films on LaAlO3 single-crystal substrates, in order to further understand the role of precursors on properties of the final films. After the same pyrolysis and sintering processes, the films from propionates and butyrates show pure YBCO phase and were epitaxially grown, as determined by X-ray diffractometer analysis. There are clear differences in morphologies of these four films, i.e., the films from propionates and butyrates exhibit platelike grains without distinct grain boundaries, while almost randomly orientated grains were observed on the surface of the other two films. As a result, we noticed significant discrepancies on their superconducting performance. The films from propionates and butyrates give Jc values (at 77 K, self-field) of 2.1 MA/cm2 and 1.3 MA/cm2, respectively, while no superconducting transition above 70 K was observed in the other two films. A relatively larger amount of carbonaceous residue left as a by-product after decomposition of carboxylates with longer ligands, particularly under fast pyrolysis and sintering processes, could be one of the explanations of the poor superconductivity in the films from the valerateand hexanoate-based precursors.

AB - In this work, four fluorine-free solutions based on various carboxylates (propionates, butyrates, valerates, and hexanoates, respectively) were prepared and used for deposition of YBCO films on LaAlO3 single-crystal substrates, in order to further understand the role of precursors on properties of the final films. After the same pyrolysis and sintering processes, the films from propionates and butyrates show pure YBCO phase and were epitaxially grown, as determined by X-ray diffractometer analysis. There are clear differences in morphologies of these four films, i.e., the films from propionates and butyrates exhibit platelike grains without distinct grain boundaries, while almost randomly orientated grains were observed on the surface of the other two films. As a result, we noticed significant discrepancies on their superconducting performance. The films from propionates and butyrates give Jc values (at 77 K, self-field) of 2.1 MA/cm2 and 1.3 MA/cm2, respectively, while no superconducting transition above 70 K was observed in the other two films. A relatively larger amount of carbonaceous residue left as a by-product after decomposition of carboxylates with longer ligands, particularly under fast pyrolysis and sintering processes, could be one of the explanations of the poor superconductivity in the films from the valerateand hexanoate-based precursors.

KW - Carboxylate

KW - Chemical solution method

KW - Epitaxial growth

KW - Fluorine-free

KW - Thin films

U2 - 10.1109/TASC.2014.2360151

DO - 10.1109/TASC.2014.2360151

M3 - Journal article

VL - 25

SP - 6600204

JO - I E E E Transactions on Applied Superconductivity

JF - I E E E Transactions on Applied Superconductivity

SN - 1051-8223

IS - 3

ER -