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Long-range magnetic interactions and proximity effects in an amorphous exchange-spring magnet

Author

Listed:
  • F. Magnus

    (Uppsala University
    Science Institute, University of Iceland)

  • M. E. Brooks-Bartlett

    (University College London)

  • R. Moubah

    (Uppsala University
    LPMMAT, Université Hassan II de Casablanca, Faculté des Sciences Ain Chock)

  • R. A. Procter

    (University of Warwick)

  • G. Andersson

    (Uppsala University)

  • T. P. A. Hase

    (University of Warwick)

  • S. T. Banks

    (University College London
    Present address: Faculty of Engineering Sciences, University College London, Gower Street, London WC1E 6BT, UK.)

  • B. Hjörvarsson

    (Uppsala University)

Abstract

Low-dimensional magnetic heterostructures are a key element of spintronics, where magnetic interactions between different materials often define the functionality of devices. Although some interlayer exchange coupling mechanisms are by now well established, the possibility of direct exchange coupling via proximity-induced magnetization through non-magnetic layers is typically ignored due to the presumed short range of such proximity effects. Here we show that magnetic order can be induced throughout a 40-nm-thick amorphous paramagnetic layer through proximity to ferromagnets, mediating both exchange-spring magnet behaviour and exchange bias. Furthermore, Monte Carlo simulations show that nearest-neighbour magnetic interactions fall short in describing the observed effects and long-range magnetic interactions are needed to capture the extent of the induced magnetization. The results highlight the importance of considering the range of interactions in low-dimensional heterostructures and how magnetic proximity effects can be used to obtain new functionality.

Suggested Citation

  • F. Magnus & M. E. Brooks-Bartlett & R. Moubah & R. A. Procter & G. Andersson & T. P. A. Hase & S. T. Banks & B. Hjörvarsson, 2016. "Long-range magnetic interactions and proximity effects in an amorphous exchange-spring magnet," Nature Communications, Nature, vol. 7(1), pages 1-7, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11931
    DOI: 10.1038/ncomms11931
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    Cited by:

    1. Liu, Zi-An & Dong, Yu-Li & Wu, Ning & Wang, Yimin & You, Wen-Long, 2021. "Quantum criticality and correlations in the Ising-Gamma chain," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 579(C).

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