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Magnetic AC Loss of Monofilament Sr 0 . 6 K 0 . 4 Fe 2 As 2 /Ag Tape

  • Qi Liu
  • Guomin ZhangEmail author
  • Hui Yu
  • Zhongjing Liu
Original Paper

Abstract

Measurements of magnetic AC losses in applied magnetic fields have been made on monofilament Sr0.6 K 0.4Fe2As2/Ag tape in the temperature range between 15 and 30 K. The magnetic AC losses are obtained by an M-H hysteresis loop-based method. That is, AC losses were determined from the area of the hysteresis loop measured using a vibrating sample magnetometer (VSM) under an externally applied cyclic field up to 7 T. Temperature dependence critical currents of the tapes are measured as a function of magnetic field up to 10 T. The experimental losses are compared with those based on the critical-state model and those based on the modified critical-state model. There is a good agreement with the second model over a wide field range. Also, measured AC losses with varying field ramp rate are compared with each other.

Keywords

Magnetic AC loss Iron-based superconductor 

Notes

Acknowledgments

The authors thank Yanwei Ma’s group of Institute of Electrical Engineering for providing the Sr0.6K0.4Fe2As2 samples. Many thanks to Dr. Guole Liu for useful discussions. This work is supported by the Natural Science Foundation of China (Contract Nos. 51377155).

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Qi Liu
    • 1
    • 2
    • 3
    • 4
  • Guomin Zhang
    • 1
    • 2
    Email author
  • Hui Yu
    • 1
    • 2
    • 3
  • Zhongjing Liu
    • 1
    • 2
  1. 1.Key Laboratory of Applied SuperconductivityChinese Academy of SciencesBeijingChina
  2. 2.Institute of Electrical EngineeringChinese Academy of SciencesBeijingChina
  3. 3.University of the Chinese Academy of SciencesBeijingChina
  4. 4.Institute of ScienceInformation Engineering UniversityZhengzhouChina

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