N. S. Gusev, Yu. A. Dudin, A. V. Sadovnikov, M. V. Sapozhnikov, “Modification of the interfacial Dzyaloshinskii–Moriya interaction in cobalt/heavy metal films irradiated with helium ions”, Fizika Tverdogo Tela, 2021, Volume 63, Issue 9,Pages <nobr>1263

XXV International Symposium Nanophysics and Nanoelectronics, Nizhny Novgorod, March 9-12, 2021
Magnetism

Modification of the interfacial Dzyaloshinskii–Moriya interaction in cobalt/heavy metal films irradiated with helium ions

N. S. Gusev^a, Yu. A. Dudin^b, A. V. Sadovnikov^cd, M. V. Sapozhnikov^ae

^a Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhny Novgorod, Russia
^b Scientific-Research Physicotechnical Institute at the Nizhnii Novgorod State University, Nizhny Novgorod, Russia
^c Laboratory of Magnetic Metamaterials, Saratov State University, Saratov, Russia
^d Kotel'nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow, Russia
^e State University of Nizhny Novgorod, Nizhny Novgorod, Russia

Abstract: The effect of irradiation with helium ions of thin cobalt films on a layer of heavy metals (Pt and W) on the interfacial Dzyaloshinskii–Moriya interaction (iDMI) is studied experimentally. The iDMI value is measured via Brillouin light scattering (BLS). The hysteresis loops of the samples are measured via optical magnetometry. The iDMI value varies nonmonotonically in the range of 0.1–0.6 J m $^{-2}$ at fluences of 10$^{14}$–10$^{16}$ cm$^{-2}$.

Keywords: ferromagnetic films, Dzyaloshinskii–Moriya surface interaction, perpendicular anisotropy.

Received: 09.04.2021
Revised: 09.04.2021
Accepted: 19.04.2021

DOI: 10.21883/FTT.2021.09.51250.04H