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

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arxiv 1802.00705 v1 pith:WTJMSRAW submitted 2018-02-02 cond-mat.mtrl-sci

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. {\AA}kerman This is my paper
classification cond-mat.mtrl-sci
keywords all-perpendicularfluenceirradiationmagneticspinlayersmagnetodynamicproperties
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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.

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