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β -NMR Investigation of the Depth-Dependent Magnetic Properties of an Antiferromagnetic Surface

Journal Article


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Abstract


  • By measuring the prototypical antiferromagnet α-Fe2O3, we show that it is possible to determine the

    static spin orientation and dynamic spin correlations within nanometers from an antiferromagnetic surface

    using the nuclear spin polarization of implanted 8Liþ ions detected with β-NMR. Remarkably, the firstorder

    Morin spin reorientation in single crystal α-Fe2O3 occurs at the same temperature at all depths

    between 1 and 100 nm from the (110) surface; however, the implanted nuclear spin experiences an

    increased 1=T1 relaxation rate at shallow depths revealing soft-surface magnons. The surface-localized

    dynamics decay towards the bulk with a characteristic length of ϵ ¼ 11 1 nm, closely matching the

    finite-size thresholds of hematite nanostructures.

Authors


  •   Cortie, David L.
  •   Buck, T (external author)
  •   Dehn, M (external author)
  •   Karner, V L. (external author)
  •   Kiefl, R F. (external author)
  •   Levy, C D. P. (external author)
  •   Mcfadden, R M. L. (external author)
  •   Morris, G D. (external author)
  •   McKenzie, I (external author)
  •   Pearson, M R. (external author)
  •   Wang, Xiaolin
  •   Macfarlane, W A. (external author)

Publication Date


  • 2016

Citation


  • Cortie, D. L., Buck, T., Dehn, M. H., Karner, V. L., Kiefl, R. F., Levy, C. D. P., Mcfadden, R. M.L., Morris, G. D., McKenzie, I., Pearson, M. R., Wang, X. L. & Macfarlane, W. A. (2016). β -NMR Investigation of the Depth-Dependent Magnetic Properties of an Antiferromagnetic Surface. Physical Review Letters, 116 106103-1-106103-5.

Scopus Eid


  • 2-s2.0-84961122525

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2812&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1810

Has Global Citation Frequency


Start Page


  • 106103-1

End Page


  • 106103-5

Volume


  • 116

Place Of Publication


  • United States

Abstract


  • By measuring the prototypical antiferromagnet α-Fe2O3, we show that it is possible to determine the

    static spin orientation and dynamic spin correlations within nanometers from an antiferromagnetic surface

    using the nuclear spin polarization of implanted 8Liþ ions detected with β-NMR. Remarkably, the firstorder

    Morin spin reorientation in single crystal α-Fe2O3 occurs at the same temperature at all depths

    between 1 and 100 nm from the (110) surface; however, the implanted nuclear spin experiences an

    increased 1=T1 relaxation rate at shallow depths revealing soft-surface magnons. The surface-localized

    dynamics decay towards the bulk with a characteristic length of ϵ ¼ 11 1 nm, closely matching the

    finite-size thresholds of hematite nanostructures.

Authors


  •   Cortie, David L.
  •   Buck, T (external author)
  •   Dehn, M (external author)
  •   Karner, V L. (external author)
  •   Kiefl, R F. (external author)
  •   Levy, C D. P. (external author)
  •   Mcfadden, R M. L. (external author)
  •   Morris, G D. (external author)
  •   McKenzie, I (external author)
  •   Pearson, M R. (external author)
  •   Wang, Xiaolin
  •   Macfarlane, W A. (external author)

Publication Date


  • 2016

Citation


  • Cortie, D. L., Buck, T., Dehn, M. H., Karner, V. L., Kiefl, R. F., Levy, C. D. P., Mcfadden, R. M.L., Morris, G. D., McKenzie, I., Pearson, M. R., Wang, X. L. & Macfarlane, W. A. (2016). β -NMR Investigation of the Depth-Dependent Magnetic Properties of an Antiferromagnetic Surface. Physical Review Letters, 116 106103-1-106103-5.

Scopus Eid


  • 2-s2.0-84961122525

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2812&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1810

Has Global Citation Frequency


Start Page


  • 106103-1

End Page


  • 106103-5

Volume


  • 116

Place Of Publication


  • United States