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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.

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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