Local measurement of temperature dependent London Penetration Depth in Superconductors using Nitrogen Vacancy Centers in Diamond

ORAL

Abstract

Local optical magneto-sensing based on nitrogen-vacancy (NV) centers in diamond [1] was used to measure temperature-dependent London penetration depth, λ (T), in two different unconventional superconductors, Ba(Fe1-xCox)2As2 (BaCo122) and YBa2Cu3O7-δ (YBCO). The results are compared with the sensitive bulk measurements of the same samples using tunnel-diode resonator (TDR). Each sample was measured in two orientation to separate the effects of platelet geometry and surface morphology, imaged using SEM. Not only this study compares the absolute numbers from two different techniques, it also allows us to discuss a more realistic picture of the magnetic field penetration into superconducting samples.

*This work was supported by the US DOE, Office of Science, BES Materials Science and Engineering
Division under contract #DE-AC02-07CH11358. N.M.N. acknowledges support from the Lab Directed Research and Development (LDRD) program at Ames Laboratory for the implementation of the NV-center optical magnetometry.

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Presenters

  • Kamal Joshi

    • Ames laboratory, Ames, IA
    • Ames Laboratory

Authors

  • Kamal Joshi

    • Ames laboratory, Ames, IA
    • Ames Laboratory

  • William S. Setterberg

    • Macalester College, Saint Paul, MN

  • Naufer M Nusran

    • Ames laboratory, Ames, IA
    • Ames Laboratory

  • Sunil Ghimire

    • Ames laboratory, Ames, IA
    • Ames Laboratory

  • Kyuil Cho

    • Ames laboratory, Ames, IA
    • Ames Laboratory
    • Ames Laboratory and Iowa state University, Ames, USA

  • Makariy Tanatar

    • Ames laboratory, Ames, IA
    • Ames Lab

  • Sergey L. Bud'ko

    • Iowa State University
    • Ames Laboratory and Iowa State University
    • Ames Lab
    • Ames laboratory, Ames, IA
    • Department of Physics & Astronomy, Iowa State University/Ames Laboratory
    • Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Iowa State University and Ames Laboratory
    • Iowa State University, Ames Laboratory
    • Division of Materials Sciences & Engineering, Ames Lab and Iowa State University
    • Iowa State University/Ames Laboratory

  • Paul C Canfield

    • Iowa State University
    • Ames Laboratory and Iowa State University
    • Ames Lab
    • Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
    • Ames laboratory, Ames, IA
    • Ames Laboratory, Iowa State University
    • Department of Physics & Astronomy, Iowa State University/Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University/Ames Laboratory
    • Iowa State University and Ames Laboratory
    • Iowa State University, Ames Laboratory
    • Department of Physics and Astronomy, Iowa State University
    • Division of Materials Sciences & Engineering, Ames Lab and Iowa State University
    • Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy
    • Iowa State University/Ames Laboratory

  • Ruslan Prozorov

    • Ames Lab
    • Ames laboratory, Ames, IA
    • Ames Laboratory
    • Ames Laboratory and Iowa state University, Ames, USA
    • Iowa State University/Ames Laboratory