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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.

The Heisenberg ferromagnet model has been studied theoretically using the Weiss mean-field theory and Green’s function technique. The equations for the Curie temperature, magnetization, and magnetic susceptibility were analytically derived. Moreover, we proved, that our results are useful in description of real materials. The calculated value of Curie temperature for [Formula: see text] alloy correspond well with the experimental results obtained recently on the base of the temperature dependences of magnetization.