TY - JOUR
T1 - Effect of BaZrO3 addition and film growth on superconducting properties of (Nd, Eu, Gd)Ba2Cu3Oy thin films
AU - Ichino, Yusuke
AU - Yoshida, Yutaka
AU - Inoue, Kouichi
AU - Ozaki, Toshinori
AU - Takai, Yoshiaki
AU - Matsumoto, Kaname
AU - Mukaida, Masashi
AU - Kita, Ryusuke
AU - Ichinose, Ataru
AU - Horii, Shigeru
N1 - Funding Information:
Manuscript received August 15, 2008. First published June 30, 2009; current version published July 15, 2009. This work was supported in part by CREST of JST and by Grant-in-Aid for Scientific Research 19676005 and 20686065.
PY - 2009/6
Y1 - 2009/6
N2 - We report that (Nd, Eu, Gd)Ba2Cu3Oy (NEG) films grown by low temperature growth (LTG) technique exhibit excellent superconducting properties in magnetic fields. In this study, we aim to improve the superconducting properties of NEG films by means of a modified LTG technique (mLTG) in which the surface of a highly c-axis oriented NEG seed layer is decorated by BaZrO3 (BZO) nanodots and an NEG upper layer on the seed layer is deposited at relatively low substrate temperature by using a BZO doped NEG123 target. From magnetic field and angular dependence of Jc, even Jc peak around,B//c-axis of an LTG-NEG films including BZO was larger than that of LTG-NEG without BZO. Furthermore, the mLTG-NEG films showed larger Jc peak than the LTG-NEG films with BZO and the Jc peak increased with increasing the BZO nanodots density. TEM images clarified that these films included BZO nanorods with a diameter of 5∼10 nm and the number density increased by introducing the BZO nanodots. Therefore, we concluded that the mLTG enabled to improve the superconducting properties due to control the configuration of BZO nanorods in the films.
AB - We report that (Nd, Eu, Gd)Ba2Cu3Oy (NEG) films grown by low temperature growth (LTG) technique exhibit excellent superconducting properties in magnetic fields. In this study, we aim to improve the superconducting properties of NEG films by means of a modified LTG technique (mLTG) in which the surface of a highly c-axis oriented NEG seed layer is decorated by BaZrO3 (BZO) nanodots and an NEG upper layer on the seed layer is deposited at relatively low substrate temperature by using a BZO doped NEG123 target. From magnetic field and angular dependence of Jc, even Jc peak around,B//c-axis of an LTG-NEG films including BZO was larger than that of LTG-NEG without BZO. Furthermore, the mLTG-NEG films showed larger Jc peak than the LTG-NEG films with BZO and the Jc peak increased with increasing the BZO nanodots density. TEM images clarified that these films included BZO nanorods with a diameter of 5∼10 nm and the number density increased by introducing the BZO nanodots. Therefore, we concluded that the mLTG enabled to improve the superconducting properties due to control the configuration of BZO nanorods in the films.
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U2 - 10.1109/TASC.2009.2018207
DO - 10.1109/TASC.2009.2018207
M3 - Article
AN - SCOPUS:68649088761
VL - 19
SP - 3144
EP - 3147
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 3
M1 - 5153241
ER -