TY - JOUR
T1 - Influence of DC external magnetic field on AC transport current loss of HTS tape
AU - Miyagi, D.
AU - Tsukamoto, O.
AU - Amemiya, N.
AU - Mukai, H.
AU - Fujikami, J.
AU - Hayashi, K.
AU - Sato, K.
N1 - Funding Information:
This work supported in part by Grant-in-Aid for Basic Research, the Ministry of Education, Science and culture, Japan.
PY - 1998/12
Y1 - 1998/12
N2 - We measured the AC transport current loss of Bi 2223 multifilament Ag-sheathed tape under DC external magnetic field of 0-0.2 T. There were discrepancies between the measured data and Norris' formula for elliptical model in the range of low value of Ip/Ic (Ip and Ic are peak of the AC transport current and critical current of the tape respectively), while without DC background field, the loss of the tape was close to Norris' formula. Theoretically speaking, even with the DC background field and decreased critical current the AC transport current loss of the tape follows Norris' formula which is derived from the Bean model. When DC background field is applied to the HTS tape, n value of the power law E-J characteristics decreases together with the decrease of Jc. Dependence of the AC transport current loss on the n value was analyzed by numerical calculation. The results show that the loss depends on the n value and that decrease of the n value is one of the causes of the discrepancies between the measured data and Norris' formula.
AB - We measured the AC transport current loss of Bi 2223 multifilament Ag-sheathed tape under DC external magnetic field of 0-0.2 T. There were discrepancies between the measured data and Norris' formula for elliptical model in the range of low value of Ip/Ic (Ip and Ic are peak of the AC transport current and critical current of the tape respectively), while without DC background field, the loss of the tape was close to Norris' formula. Theoretically speaking, even with the DC background field and decreased critical current the AC transport current loss of the tape follows Norris' formula which is derived from the Bean model. When DC background field is applied to the HTS tape, n value of the power law E-J characteristics decreases together with the decrease of Jc. Dependence of the AC transport current loss on the n value was analyzed by numerical calculation. The results show that the loss depends on the n value and that decrease of the n value is one of the causes of the discrepancies between the measured data and Norris' formula.
KW - Bi-2223 tape
KW - E-J characteristics
KW - Magnetic field dependence
KW - Transport AC loss
KW - n value
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U2 - 10.1016/S0921-4534(98)00440-7
DO - 10.1016/S0921-4534(98)00440-7
M3 - Article
AN - SCOPUS:0032278874
SN - 0921-4534
VL - 310
SP - 90
EP - 94
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 1-4
ER -