TY - JOUR
T1 - Flux Pinning Properties in BaHfO3-Doped SmBa2Cu3Oy Films on Metallic Substrates Fabricated with Low Temperature Growth
AU - Miura, S.
AU - Yoshida, Y.
AU - Ichino, Y.
AU - Doki, Y.
AU - Ibi, A.
AU - Izumi, T.
AU - Kato, T.
N1 - Funding Information:
This work was supported in part by Murata Science Foundation through a Grant-in-Aid for Scientific Research (23226014, 25289358, 15H04252, 15K14301, and 15K14302). A part of this work includes the results supported by the Ministry of Economy, Trade and Industry (METI) and by the ALCA Project of the Japan Science and Technology Agency (JST).
Publisher Copyright:
© 2015 IEEE.
PY - 2016/6
Y1 - 2016/6
N2 - We have developed SmBa2Cu3Oy (SmBCO) superconducting films with BaHfO3 (BHO) inclusions on singlecrystalline substrates via a pulsed laser deposition method. We have controlled the morphology of the BHO nanorods within the SmBCOmatrix by varying growth temperature during the depositions. In this paper, we fabricated 1.5 vol.% BHO-doped SmBCO films on metallic substrates at 750 .C [low-temperature growth (LTG) film] and 840 .C [high-temperature growth (HTG) film]. The LTG film showed lower flux pinning performance at a relatively high measurement temperature ranging from 65 K to 77 K than the HTG film. However, at a low measurement temperature of 20 K under high magnetic fields, the LTG film exhibited higher flux pinning performance in comparison with the HTG film. The maximum flux pinning force density was more than 520 GN/m3 at 20 K under 9 T. Even on the metallic substrates, LTG is also helpful in achieving an improved flux pinning performance of SmBCO films at low measurement temperatures under high magnetic fields.
AB - We have developed SmBa2Cu3Oy (SmBCO) superconducting films with BaHfO3 (BHO) inclusions on singlecrystalline substrates via a pulsed laser deposition method. We have controlled the morphology of the BHO nanorods within the SmBCOmatrix by varying growth temperature during the depositions. In this paper, we fabricated 1.5 vol.% BHO-doped SmBCO films on metallic substrates at 750 .C [low-temperature growth (LTG) film] and 840 .C [high-temperature growth (HTG) film]. The LTG film showed lower flux pinning performance at a relatively high measurement temperature ranging from 65 K to 77 K than the HTG film. However, at a low measurement temperature of 20 K under high magnetic fields, the LTG film exhibited higher flux pinning performance in comparison with the HTG film. The maximum flux pinning force density was more than 520 GN/m3 at 20 K under 9 T. Even on the metallic substrates, LTG is also helpful in achieving an improved flux pinning performance of SmBCO films at low measurement temperatures under high magnetic fields.
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U2 - 10.1109/TASC.2016.2515364
DO - 10.1109/TASC.2016.2515364
M3 - Article
AN - SCOPUS:84962440783
VL - 26
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 4
M1 - 7378312
ER -