Kim, Dae-Yun Park, Min-Ho Park, Yong-Keun Yu, Ji-Sung Kim, Joo-Sung Kim, Duck-Ho Min, Byoung-Chul Choe, Sug-Bong 2024-01-19T23:32:00Z 2024-01-19T23:32:00Z 2021-09-03 2018-02 0003-6951 https://pubs.kist.re.kr/handle/201004/121746 In this study, we investigate the influence of the ferromagnetic layer thickness on the magnetization process. A series of ultrathin Pt/Co/TiO2/Pt films exhibits domain-wall (DW) speed variation of over 100,000 times even under the same magnetic field, depending on the ferromagnetic layer thickness. From the creep-scaling analysis, such significant variation is found to be mainly attributable to the thickness-dependence of the creep-scaling constant in accordance with the creep-scaling theory of the linear proportionality between the creep-scaling constant and the ferromagnetic layer thickness. Therefore, a thinner film shows a faster DW speed. The DW roughness also exhibits sensitive dependence on the ferromagnetic layer thickness: a thinner film shows smoother DW. The present observation provided a guide for an optimal design rule of the ferromagnetic layer thickness for better performance of DW-based devices. Published by AIP Publishing. English AMER INST PHYSICS Huge domain-wall speed variation with respect to ferromagnetic layer thickness in ferromagnetic Pt/Co/TiO2/Pt films Article 10.1063/1.5009726 1 APPLIED PHYSICS LETTERS, v.112, no.6 APPLIED PHYSICS LETTERS 112 6 scie scopus 000424703200027 2-s2.0-85041699180 Physics, Applied Physics Article MAGNETIC-ANISOTROPY DRIVEN MOTION MEMORY