Measurement and Analysis on Local Magnetization Properties of RE-123 Coated Conductor With DC Transport Current and External Magnetic Field

Longitudinal and transverse voltages have been measured on thin films of MgB2 with different width of superconducting transition range. The study has been performed in zero and nonzero external magnetic fields. The non-zero transverse voltage has been observed in close vicinity of the critical temperature in zero external magnetic field while far enough from Tc this voltage has been zero. In magnetic field it merges into transverse voltage which is an even function with respect to the direction of the field. Usual Hall voltage starts to appear with increasing magnetic field. At the highest field the even voltage disappears and only the Hall voltage is measurable i.e. the transverse even voltage is suppressed with increasing magnetic field and increasing transport current as well. New scaling between transverse and longitudinal resistivities has been observed in the form ρxy~dρxx/dT . This correlation is valid not only in the zero magnetic field but also in nonzero magnetic field where transverse even voltage can be detected. Several models trying to explain observed results are discussed. The most promising seems to be guided motion of the vortices.

Download Full-text

Current Distribution in Coated Conductor Under External Magnetic Field Up to 5 T

IEEE Transactions on Applied Superconductivity ◽

10.1109/tasc.2010.2093102 ◽

2011 ◽

Vol 21 (3) ◽

pp. 1600-1603 ◽

Cited By ~ 4

Author(s):

Akihisa Miyazoe ◽

Masaki Sekino ◽

Tsukasa Kiyoshi ◽

Hiroyuki Ohsaki

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Current Distribution ◽

Coated Conductor

Download Full-text

Theoretical expressions for AC losses of superconducting coils in external magnetic field and transport current with phase difference

Physica C Superconductivity ◽

10.1016/s0921-4534(01)00486-5 ◽

2001 ◽

Vol 357-360 ◽

pp. 1205-1208 ◽

Cited By ~ 13

Author(s):

K. Kawasaki ◽

K. Kajikawa ◽

M. Iwakuma ◽

K. Funaki

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Phase Difference ◽

Transport Current ◽

Ac Losses ◽

Superconducting Coils

Download Full-text

Критический ток в длинном джозефсоновском контакте во внешнем магнитном поле при слабом пиннинге

Журнал технической физики ◽

10.21883/jtf.2022.03.52136.285-21 ◽

2022 ◽

Vol 92 (3) ◽

pp. 414

Author(s):

М.А. Зеликман

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Critical Current ◽

Critical Value ◽

Transport Current ◽

Entire Length ◽

Gibbs Potential ◽

Potential Reduction ◽

The Magnetic Field ◽

Josephson Contact

The analysis of possible current distributions when passing current through a periodically modulated long Josephson contact located in an external magnetic field is carried out. An approach based on the analysis of continuous configuration modification proceeding in the direction of Gibbs potential reduction is used for the calculation. The case when the pinning parameter is less than the critical value is considered. It is shown that at any value of the external magnetic field, there is a critical value of the transport current, when exceeded, the situation ceases to be stationary, as a result of which energy passes into radiation and heat, i.e. currents cease to be persistent. The value of the critical current is determined by the value of the magnetic field at which the vortices begin to fill the entire length of the contact. With an increase in the external magnetic field, the critical value of the current decreases.

Download Full-text