Coercivity Enhancement of Pt/Co and Pt/Co/Pt/Co Thin Films by Ar+ Ion Irradiation Followed by Heat Treatment
| Authors | A. Orlov1, R. Pedan1, I. Kruhlov1, Y. Yavorskyi1, O. Palchekovskyi1, O. Dubikovskyi1,2, O. Kosulya2, A. Bodnaruk1,3, I. Vladymyrskyi1 |
| Affiliations |
1National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, 03056 Kyiv, Ukraine 2V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 03680 Kyiv, Ukraine 3Institute of Physics, National Academy of Sciences of Ukraine, 03028 Kyiv, Ukraine |
| Е-mail | orlov@kpm.kpi.ua |
| Issue | Volume 17, Year 2025, Number 6 |
| Dates | Received 08 August 2025; revised manuscript received 15 December 2025; published online 19 December 2025 |
| Citation | A. Orlov, R. Pedan, et al., J. Nano- Electron. Phys. 17 No 6, 06001 (2025) |
| DOI | https://doi.org/10.21272/jnep.17(6).06001 |
| PACS Number(s) | 75.70.Cn, 61.72.y |
| Keywords | Magnetic thin films, Ion irradiation (4) , Intermixing, Co-Pt alloy, Interface (7) , Phase formation. |
| Annotation |
This paper discusses the effect of Ar+ ion irradiation followed by thermal annealing on the magnetic and structural properties of Pt/Co and Pt/Co/Pt/Co film stacks as a function of ion bombardment fluence. The correlation between phase formation, chemical depth distribution of the main components, and structure modification related to the change in coercivity has been investigated by the XRD, SIMS, and VSM analysis. We observed a considerable increase in coercivity up to 532 Oe in the four-layered stack after ion pre-irradiation with a fluence of 1 x 1014 ions/cm2 and subsequent annealing at 550 °C. The observed enhancement of coercivity is accompanied by local structure disorder with Co and Pt atom displacements and defect clustering, which is enhanced with the increase of the interface number. These results are in good agreement with the depth profile evaluated independently by SRIM simulations. |
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