Ultrafast optically induced ferromagnetic state in an elemental antiferromagnet

E. Golias; I. Kumberg; I. Gelen; S. Thakur; J. Gördes; R. Hosseinifar; Q. Guillet; J. K. Dewhurst; S. Sharma; C. Schüßler-Langeheine; N. Pontius; W. Kuch

doi:10.1103/PhysRevLett.126.107202

Ultrafast optically induced ferromagnetic state in an elemental antiferromagnet

Mesoscale and Nanoscale Physics 2021-03-17 v4 Materials Science

Authors: E. Golias , I. Kumberg , I. Gelen , S. Thakur , J. Gördes , R. Hosseinifar , Q. Guillet , J. K. Dewhurst , S. Sharma , C. Schüßler-Langeheine , N. Pontius , W. Kuch

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Abstract

We present evidence for an ultrafast optically induced ferromagnetic alignment of antiferromagnetic Mn in Co/Mn multilayers. We observe the transient ferromagnetic signal at the arrival of the pump pulse at the Mn L $_3$ resonance using x-ray magnetic circular dichroism in reflectivity. The timescale of the effect is comparable to the duration of the excitation and occurs before the magnetization in Co is quenched. Theoretical calculations point to the imbalanced population of Mn unoccupied states caused by the Co interface for the emergence of this transient ferromagnetic state.

Keywords

ultrafast optics antiferromagnet ferromagnetic state co/mn multilayers x-ray magnetic circular dichroism transient magnetization

Cite

@article{arxiv.2006.16061,
  title  = {Ultrafast optically induced ferromagnetic state in an elemental antiferromagnet},
  author = {E. Golias and I. Kumberg and I. Gelen and S. Thakur and J. Gördes and R. Hosseinifar and Q. Guillet and J. K. Dewhurst and S. Sharma and C. Schüßler-Langeheine and N. Pontius and W. Kuch},
  journal= {arXiv preprint arXiv:2006.16061},
  year   = {2021}
}

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6 pages, 3 figures

Ultrafast optically induced ferromagnetic state in an elemental antiferromagnet

Abstract

Keywords

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