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Unraveling oscillations at ferro(para)magnetic and non-collinear antiferromagnetic interfaces

Author

Listed:
  • Thiago Ferro

    (Universidade Federal Rural de Pernambuco
    Universidade Federal Rural de Pernambuco)

  • Luana Hildever

    (Universidade Federal Rural de Pernambuco
    Universidade Federal Rural de Pernambuco)

  • André José

    (Universidade Federal Rural de Pernambuco
    Universidade Federal Rural de Pernambuco)

  • José Holanda

    (Universidade Federal Rural de Pernambuco
    Universidade Federal Rural de Pernambuco
    Universidade Federal Rural de Pernambuco)

Abstract

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 $$_3$$ 3 produce instability in the surface magnetoresistance of the material, which is sensitive to the magnetic field. We carried out experiments using bilayers of IrMn $$_3$$ 3 under permalloy (Py) and IrMn $$_3$$ 3 under platinum (Pt). The oscillations were intensely evident at the Py/IrMn $$_3$$ 3 interface and less explicit at the Pt/IrMn $$_3$$ 3 interface. We carried out the experiments using pulsed current, with a square pulse width of 1 $$\mu $$ μ s and amplitudes of $$I_{AC}$$ I AC = 20 $$\mu $$ μ A to 20 mA. The oscillating signals are proportional to the crystallographic direction of the material, the ferromagnetism of the material adjacent to IrMn $$_3$$ 3 , and sensitive to the amplitude of the pulsed current. We believe that observation is a way of transmitting encoded information through magnetoresistance. Graphical abstract

Suggested Citation

  • Thiago Ferro & Luana Hildever & André José & José Holanda, 2024. "Unraveling oscillations at ferro(para)magnetic and non-collinear antiferromagnetic interfaces," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 97(9), pages 1-5, September.
  • Handle: RePEc:spr:eurphb:v:97:y:2024:i:9:d:10.1140_epjb_s10051-024-00789-y
    DOI: 10.1140/epjb/s10051-024-00789-y
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    References listed on IDEAS

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    1. A. Chikina & M. Höppner & S. Seiro & K. Kummer & S. Danzenbächer & S. Patil & A. Generalov & M. Güttler & Yu. Kucherenko & E. V. Chulkov & Yu. M. Koroteev & K. Koepernik & C. Geibel & M. Shi & M. Rado, 2014. "Correction: Corrigendum: Strong ferromagnetism at the surface of an antiferromagnet caused by buried magnetic moments," Nature Communications, Nature, vol. 5(1), pages 1-1, May.
    2. Motoi Kimata & Hua Chen & Kouta Kondou & Satoshi Sugimoto & Prasanta K. Muduli & Muhammad Ikhlas & Yasutomo Omori & Takahiro Tomita & Allan. H. MacDonald & Satoru Nakatsuji & Yoshichika Otani, 2019. "Magnetic and magnetic inverse spin Hall effects in a non-collinear antiferromagnet," Nature, Nature, vol. 565(7741), pages 627-630, January.
    3. A. Chikina & M. Höppner & S. Seiro & K. Kummer & S. Danzenbächer & S. Patil & A. Generalov & M. Güttler & Yu. Kucherenko & E. V. Chulkov & Yu. M. Koroteev & K. Koepernik & C. Geibel & M. Shi & M. Rado, 2014. "Strong ferromagnetism at the surface of an antiferromagnet caused by buried magnetic moments," Nature Communications, Nature, vol. 5(1), pages 1-7, May.
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