Dimensional Effects in Magnetoresistive Properties in Three-Layer Films

Authors Yu.M. Shabelnyk1 , D.І. Saltykov2, N.I. Shumakova1 , L.V. Dekhtyaruk3 , I.O. Shpetnyi1 , D.V. Ovechkin1, A.M. Chornous1 , Yu.O. Shkurdoda1

1Sumy State University, 2, Rymsky-Korsakov St., 40007 Sumy, Ukraine

2Sumy State Pedagogical University named after A.S. Makarenko, 87, Romens'ka St., 40002 Sumy, Ukraine

3Kharkiv National University of Construction and Architecture, 40, Sumska St., 61002 Kharkiv, Ukraine

Issue Volume 14, Year 2022, Number 1
Dates Received 16 November 2021; revised manuscript received 21 February 2022; published online 28 February 2022
Citation Yu.M. Shabelnyk, D.І. Saltykov, N.I. Shumakova, et al., J. Nano- Electron. Phys. 14 No 1, 01011 (2022)
DOI https://doi.org/10.21272/jnep.14(1).01011
PACS Number(s) 75.47.De, 75.70.Cn, 84.37. + q
Keywords Dimensional effect, Magnetoresistance ratio, Dieny formula, Resistance shunting.

Dimensional effects in the magnetoresistive properties of FeхСо1 – х/Сu/FeхСо1 – х three-layer magnetically ordered films obtained by layer-by-layer metal condensation followed by heat treatment in the temperature range of 300÷550 K were studied experimentally and theoretically using generalized Dieny formulas [1, 2]. It is shown that in the case when the cover layer thickness is much smaller (greater) than the base layer thickness, the numerical value of the ratio is negligible due to shunting of the covering layer resistance by the resistances of the base layer and the nonmagnetic layer (shunting of the resistances of the base layer and the nonmagnetic layer by the resistance of the covering magnetic layer). If the thickness of the base and cover layers are the same, the value of becomes maximum due to the absence of the shunting effect. If the thickness of the non-magnetic layer increases, provided that the thicknesses of the base and magnetic layers of the metal do not change, the ratio monotonically decreases with increasing spacer thickness.

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