[15p-PB1-1~57] 10 Spintronics and Magnetics (Poster)

English Presentation

[15p-PB1-13] Significant Modulation of Interlayer Exchange Coupling in Synthetic Antiferromagnets by Ion Irradiation

〇Hayato Suzuki^1,2, Takumi Yamazaki², Shoya Sakamoto^2,3, Daiki Oshima⁴, Takeshi Kato^4,5, Takeshi Seki^2,3,6 (1.Grad. Sch. of Eng., Tohoku Univ., 2.IMR, Tohoku Univ., 3.CSIS, Tohoku Univ., 4.Grad. Sch. of Eng., Nagoya Univ., 5.IMaSS, Nagoya Univ., 6.SRIS, Tohoku Univ.)

Keywords:

Interlayer exchange coupling,Synthetic antiferromagnets,Ion irradiation

Realizing field-free spin-orbit torque (SOT) switching in synthetic antiferromagnets (SAFs) is crucial for developing next-generation spintronic devices. Local modulation of the interlayer exchange coupling (IEC) in SAFs is a key approach for achieving it. In this work, we exploit ion irradiation to modulate the IEC of Pt/Co/Ir-based SAFs. Since ion irradiation induces interfacial mixing, it is expected to modify not only the IEC in Co/Ir/Co stacks but also perpendicular magnetic anisotropy at the Pt/Co interface. We systematically investigate the effects of the stacking structure and the ion dose amount on the magnetic properties of the SAFs. For a specific stacking structure, we achieve modulation of the IEC while maintaining its perpendicular magnetization by ion irradiation with a low ion doze. This finding suggests that the localized ion irradiation may enable the local control of the IEC in SAFs, thereby achieving field-free SOT switching.