NEEDLE-LIKE PROPERTIES OF THE PROBING RF FIELD OF “$MAGNETIC-FIELD$” PROBES BASED ON THE SINGLE-LAYER FLAT COILS

Authors

  • S.G. Gevorgyan Superconductivity & Scientific Instrumentation Center, Chair of Solid State Physics, Faculty of Physics, YSU, Institute for Physical Research, National Academy of Sciences, Precision Sensors/Instrumentation Ltd., Armenia
  • S.T. Muradyan Superconductivity & Scientific Instrumentation Center, Chair of Solid State Physics, Faculty of Physics, YSU, Institute for Physical Research, National Academy of Sciences, Armenia
  • B.K. Kurghinyan Superconductivity & Scientific Instrumentation Center, Chair of Solid State Physics, Faculty of Physics, YSU, Armenia
  • M.I. Qerobyan Superconductivity & Scientific Instrumentation Center, Chair of Solid State Physics, Faculty of Physics, YSU, Armenia

DOI:

https://doi.org/10.46991/PYSU:A/2011.45.3.047

Keywords:

Single-layer Flat-Coil-Oscillator method, SFCO technique based “$magnetic-field$” probe, Fulde–Ferrel–Larkin–Ovchinnikov superconductivit, measurement technique for the searches of the nodal structure in FFLO-state

Abstract

A single-layer flat-coil-oscillator activated by a low power backward tunnel diode has been elaborated and created. As an inductance in a pick-up circuit of the oscillator, such a flat coil served as a “magnetic-field” probe in such a measuring instrument. The created oscillator was activated both without and with an external capacitance C0 in its resonant circuit, i.e. the flat-coil oscillator might be also activated with its own (internal) capacitance Cc. Investigation of “probe-forma-tive” capabilities of this research instrument with such an unusual coil (versus C0) showed that with a reduction of the value of this capacitance the feeling (probing) field of such a probe exponentially becomes longer, i.e. these probes become more far-ranging with decreasing C0. The revealed property of “magnetic-field” probes would permit an essential widening of capabilities of flat-coil-based probe microscopes. It may also permit to enhance the efficiency of searching and detec-tion of the nodal structure, arising at an unusual phase transition from the “uni-form” to “non-uniform” superconductivity, predicted independently by Fulde and Ferrell, and Larkin and Ovchinnikov.

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Published

2011-10-17

How to Cite

Gevorgyan, S., Muradyan, S., Kurghinyan, B., & Qerobyan, M. (2011). NEEDLE-LIKE PROPERTIES OF THE PROBING RF FIELD OF “$MAGNETIC-FIELD$” PROBES BASED ON THE SINGLE-LAYER FLAT COILS. Proceedings of the YSU A: Physical and Mathematical Sciences, 45(3 (226), 47–51. https://doi.org/10.46991/PYSU:A/2011.45.3.047

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Section

Physics