L. N. Karelina, V. V. Bolginov, Sh. A. Erkenov, S. V. Egorov, I. A. Golovchanskiy, V. I. Chichkov, A. Ben Hamida, V. V. Ryazanov, “Magnetoresistance of a ferromagnet/superconductor/ferromagnet trilayer microbridge based on diluted PdFe alloy”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2020, Volume 112, Issue 11,Pages <nobr>743

This article is cited in 8 papers

CONDENSED MATTER

Magnetoresistance of a ferromagnet/superconductor/ferromagnet trilayer microbridge based on diluted PdFe alloy

L. N. Karelina^a, V. V. Bolginov^a, Sh. A. Erkenov^ab, S. V. Egorov^a, I. A. Golovchanskiy^cb, V. I. Chichkov^c, A. Ben Hamida^cd, V. V. Ryazanov^abc

^a Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, 142432 Russia
^b Moscow Institute of Physics and Technology (National Research University), Dolgoprudnyi, Moscow region, 141700 Russia
^c Russian National University of Science and Technology (NUST) MISiS, Moscow, 119049 Russia
^d Leiden Institute of Physics, Leiden University, 2333 CA Leiden–The Netherlands

Abstract: A negative magnetoresistive effect has been observed for ferromagnet/superconductor/ferromagnet (FSF) microbridges based on diluted ferromagnetic PdFe alloy containing as small as 1% of magnetic atoms. The effect is represented by sharp negative peaks in magnetoresistance at magnetic fields opposite in sign to the initial saturated magnetizations. Microstructuring of the FSF trilayers does not suppress the effect: the most pronounced dips were obtained for the smallest bridges 6–8 $\mu$m wide and 10–15 $\mu$m long. The negative magnetoresistance peak was observed at temperatures within the superconducting transition and reaches a noticeable value of up to 1.3% of the normal state resistance.

Received: 16.09.2020
Revised: 26.10.2020
Accepted: 05.11.2020

DOI: 10.31857/S1234567820230056