Effect of Ru Interlayer thickness on Electrophysical Properties of Co/Ru/Co three-layer film systems

A.M. Lohvynov; I.V. Cheshko; I.M. Pazukha; K.V. Tyschenko; O.V. Pylypenko; A.Yu. Zahorulko

doi:10.15330/pcss.23.3.531-535

Authors

A.M. Lohvynov Sumy State University, Sumy, Ukraine
I.V. Cheshko Sumy State University, Sumy, Ukraine
I.M. Pazukha Sumy State University, Sumy, Ukraine
K.V. Tyschenko Sumy State University, Sumy, Ukraine
O.V. Pylypenko Sumy State University, Sumy, Ukraine
A.Yu. Zahorulko Sumy State University, Sumy, Ukraine

DOI:

https://doi.org/10.15330/pcss.23.3.531-535

Keywords:

three-layer film systems, layer-by-layer condensation, electrophysical properties, resistivity, temperature coefficient of resistance

Abstract

In this paper, the investigation of the crystal structure and electrophysical properties of Co/Ru/Co/Sub three-layer film systems with a Ru layer thickness d_Ru = 5-20 nm has been carried out. It is shown that for both as-deposited and annealed at 800 K thin-film samples the phase composition corresponds to hcp-Co + hcp-Ru. The dependence of resistivity and temperature coefficient of resistance as a function of d_Ru was received. It was demonstrated that the change in the resistivity value during the first cycle of heat treatment stays more significant than more Ru layer thickness. The value of temperature coefficient of resistance has an order of 10^-⁴ and growth from 5.05×10^-⁴ to 6.42×10^-⁴ K^-¹ within the d_Ru range 0-20 nm.

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