Tuning the magnetodynamic properties of all-perpendicular spin valves using He+ irradiation

S. Jiang; S. Chung; L. Herrera Diez; T. Q. Le; F. Magnusson; D. Ravelosona; J. Åkerman

Tuning the magnetodynamic properties of all-perpendicular spin valves using He+ irradiation

Materials Science 2018-02-05 v1

Authors: S. Jiang , S. Chung , L. Herrera Diez , T. Q. Le , F. Magnusson , D. Ravelosona , J. Åkerman

Abstract

Using He+ ion irradiation, we demonstrate how the magnetodynamic properties of both ferromagnetic layers in all-perpendicular [Co/Pd]/Cu/[Co/Ni] spin valves can be tuned by varying the He+ ion fluence. As the perpendicular magnetic anisotropy of both layers is gradually reduced by the irradiation, different magnetic configurations can be achieved from all-perpendicular, through orthogonal, to all in-plane. In addition, both the magnetic damping and the inhomogeneous broadening of the Co/Ni layer improve substantially with increasing fluence. GMR of the spin valve is negatively affected and decreases linearly from an original value of 1.14% to 0.4% at the maximum fluence of 50*10^14 He+/cm^2.

Keywords

he+ irradiation spin valve perpendicular magnetic anisotropy magnetodynamic properties giant magnetoresistance magnetic damping

Cite

@article{arxiv.1802.00705,
  title  = {Tuning the magnetodynamic properties of all-perpendicular spin valves using He+ irradiation},
  author = {S. Jiang and S. Chung and L. Herrera Diez and T. Q. Le and F. Magnusson and D. Ravelosona and J. Åkerman},
  journal= {arXiv preprint arXiv:1802.00705},
  year   = {2018}
}

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5 Pages, 4 Figures

Tuning the magnetodynamic properties of all-perpendicular spin valves using He+ irradiation

Abstract

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