https://doi.org/10.1140/epjb/s10051-024-00789-y
Regular Article - Solid State and Materials
Unraveling oscillations at ferro(para)magnetic and non-collinear antiferromagnetic interfaces
1
Programa de Pós-Graduação em Engenharia Física, Universidade Federal Rural de Pernambuco, Cabo de Santo Agostinho, 54518-430, Pernambuco, Brazil
2
Unidade Acadêmica do Cabo de Santo Agostinho, Universidade Federal Rural de Pernambuco, Cabo de Santo Agostinho, 54518-430, Pernambuco, Brazil
3
Group of Optoelectronics and Spintronics, Universidade Federal Rural de Pernambuco, Cabo de Santo Agostinho, 54518-430, Pernambuco, Brazil
d
joseholanda.silvajunior@ufrpe.br
Received:
15
April
2024
Accepted:
12
September
2024
Published online:
22
September
2024
Here, we show that the ferro(para)magnetic and non-collinear antiferromagnetic interfaces contribute to oscillating signals observed in the magnetoresistance. We associate the effect with the fact that the spins on the surface of IrMn
produce instability in the surface magnetoresistance of the material, which is sensitive to the magnetic field. We carried out experiments using bilayers of IrMn under permalloy (Py) and IrMn under platinum (Pt). The oscillations were intensely evident at the Py/IrMn interface and less explicit at the Pt/IrMn interface. We carried out the experiments using pulsed current, with a square pulse width of 1 
s and amplitudes of 
= 20 A to 20 mA. The oscillating signals are proportional to the crystallographic direction of the material, the ferromagnetism of the material adjacent to IrMn, and sensitive to the amplitude of the pulsed current. We believe that observation is a way of transmitting encoded information through magnetoresistance.
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