London Penetration Depth Study of Nb2InC Nanolaminate

K.M. Skoczylasa, A.E. Auguścikb, A.P. Durajskib aInstitute of Physics, Jan Długosz University in Częstochowa, al. Armii Krajowej 13/15, 42-200 Częstochowa, Poland bInstitute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

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Using the approach of strong coupling Eliashberg theory the London penetration depth (λL) function of strained Nb2InC compound has been obtained. Studied system belongs to the large family of MAX phases which share good thermal, electrical, and mechanical properties. This is the result of layered structure ensuring both good metallic and ceramic characteristics. Such combination could be of great use as long superconducting ribbons or planes composed with other flexible material. This paper examines the effect of magnetic field penetration inside superconducting material under applied current. Applied biaxial strain with values between -10% and 10% was taken into consideration. Obtained results indicate the possible amendment of the magnetic penetration depth (λL) with the use of strain applied to the material. Highest value of the London penetration depth is reported in case of strains maintaining the highest critical temperature. Reduction of λL(0) value to the least in the region of lowest Tc can be observed. This implies greater protection against supercurrent vortices breaking superconducting state.

DOI:10.12693/APhysPolA.135.196 PACS numbers: 74.20.Fg, 74.25.Bt, 74.62.Fj