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Manipulating the energy balance of a perpendicular anisotropy synthetic antiferromagnet by He+ion irradiation
Physical Review Applied ( IF 4.532 ) Pub Date : 
Leopold Koch, Fabian Samad, Miriam Lenz, and Olav Hellwig

He+ ion irradiation enables controlled post-deposition modification of layered magnetic thin film systems. The degree of the modification and its depth profile can be tuned by the irradiation dose and energy. Here we use magnetometry and magnetic force microscopy to explore the impact of gentle He+ ion irradiation on synthetic antiferromagnets (SAF) consisting of ferromagnetic (FM) Co/Pt multilayers with perpendicular magnetic anisotropy (PMA), which are antiferromagnetically (AF) coupled via Ru interlayers. This system shows a rich variety of magnetic domain patterns due to the strong competition of the different magnetic energies. We show that AF interlayer exchange and perpendicular interface anisotropy energy are reduced by the ion irradiation, thus resulting in multiple successive magnetic phase transitions.
更新日期:2020-01-09

 

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