Correlation Between the Entropy Degree and Properties of Multi-component (High-entropy) Film Materials

Authors L.V. Odnodvorets , I.Yu. Protsenko , Yu.M. Shabelnyk , N.I. Shumakova

Sumy State University, 2, Rymsky-Korsakov St., 40007 Sumy, Ukraine

Issue Volume 12, Year 2020, Number 2
Dates Received 01 February 2020; revised manuscript received 12 April 2020; published online 25 April 2020
Citation L.V. Odnodvorets, I.Yu. Protsenko, Yu.M. Shabelnyk, N.I. Shumakova, J. Nano- Electron. Phys. 12 No 2, 02014 (2020)
PACS Number(s) 61.66.Хх, 62.20.F –, 75.47.Np
Keywords Entropy of mixing, Entropy degree, Homogenization, High-entropy film alloys, Тhermal coefficient of resistance, Giant magnetoresistance.

A correlation between the degree of entropy and the electrophysical and magnetoresistive properties of film materials with different architecture in the paper establishes. It is established that the gradual decrease in thermal coefficient of resistance (TCR) during the transition from low-entropy (LEA) to high-entropy (HEA) alloys is explained by the fact that the resistivity in the direction of LEA  HEA increases as a result of the decrease of the atoms mobility during the formation of basic phase and solid phase. It is shown that the temperature sensitivity of the resistance almost does not change depending on the entropy degree. The magnetic field dependences in all three measurement geometries differs only in amplitude and has all the GMR characteristics. It is concluded that the elements of granular state are realized in HEA films. At the same time, anisotropic magnetoresistance is observed for all cases of film material architecture under certain conditions which is caused not by spin-dependent electron scattering but by spin-orbital electron interaction, that is, the architecture of the samples does not play a prominent role.

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