TY - JOUR
T1 -
Effects of BaZrO
3
dispersion into EuBa
2
Cu
3
O
7-δ
superconducting thin films
AU - Miura, M.
AU - Mukaida, Masashi
AU - Matsumoto, K.
AU - Yoshida, Y.
AU - Ichinose, A.
AU - Horii, S.
AU - Kita, R.
AU - Saito, A.
AU - Kaneko, Kenji
AU - Yamada, K.
AU - Mori, N.
PY - 2006/10/1
Y1 - 2006/10/1
N2 -
Surface resistances (R
S
) have been measured for EuBa
2
Cu
3
O
7-δ
(EuBCO) films grown in an ozone atmosphere. We grew BaZrO
3
dispersed EuBCO films with artificial pinning centers (APCs) in an ozone atmosphere. We have investigated the effects of BaZrO
3
dispersion into EuBCO films. The EuBCO films were grown using a pulsed laser deposition (PLD) in an ozone atmosphere on (1 0 0) SrTiO
3
substrates. We use a pure EuBCO target and an EuBCO + 1.0 wt% BaZrO
3
target. By BaZrO
3
dispersion into EuBCO films, the crystallinity of BaZrO
3
dispersed EuBCO films was poorer than that of pure EuBCO films. BaZrO
3
dispersion into EuBCO films did not improve their superconducting characteristics. Then we evaluated microstructure by using transmission electron microscopy (TEM). We observed nano-rods in BaZrO
3
dispersed EuBCO films. However, we did not observe nano-rods in BaZrO
3
dispersed EuBCO films grown in an oxygen atmosphere. The differences between an ozone and an oxygen atmosphere influence on nano-rod forming. We found that the nano-rod size is important and is strongly related to not only RE (RE: Rare Earth) ion radii but also growth conditions of films.
AB -
Surface resistances (R
S
) have been measured for EuBa
2
Cu
3
O
7-δ
(EuBCO) films grown in an ozone atmosphere. We grew BaZrO
3
dispersed EuBCO films with artificial pinning centers (APCs) in an ozone atmosphere. We have investigated the effects of BaZrO
3
dispersion into EuBCO films. The EuBCO films were grown using a pulsed laser deposition (PLD) in an ozone atmosphere on (1 0 0) SrTiO
3
substrates. We use a pure EuBCO target and an EuBCO + 1.0 wt% BaZrO
3
target. By BaZrO
3
dispersion into EuBCO films, the crystallinity of BaZrO
3
dispersed EuBCO films was poorer than that of pure EuBCO films. BaZrO
3
dispersion into EuBCO films did not improve their superconducting characteristics. Then we evaluated microstructure by using transmission electron microscopy (TEM). We observed nano-rods in BaZrO
3
dispersed EuBCO films. However, we did not observe nano-rods in BaZrO
3
dispersed EuBCO films grown in an oxygen atmosphere. The differences between an ozone and an oxygen atmosphere influence on nano-rod forming. We found that the nano-rod size is important and is strongly related to not only RE (RE: Rare Earth) ion radii but also growth conditions of films.
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U2 - 10.1016/j.physc.2006.06.016
DO - 10.1016/j.physc.2006.06.016
M3 - Article
AN - SCOPUS:33748211191
SN - 0921-4534
VL - 445-448
SP - 845
EP - 848
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 1-2
ER -