التفاصيل البيبلوغرافية
| العنوان: |
Intermixing induced anisotropy variations in CoB-based chiral multilayer films. |
| المؤلفون: |
Tan, H K, Lim, Royston J J, Seng, H L, Shanmugam, J, Ko, H Y Y, Cheng, X M, Putra, V, Xing, Z X, Soumyanarayanan, Anjan, Ho, Pin |
| المصدر: |
Journal of Physics D: Applied Physics; 9/2/2021, Vol. 54 Issue 35, p1-10, 10p |
| مصطلحات موضوعية: |
MULTILAYERED thin films, PERPENDICULAR magnetic anisotropy, MAGNETIC anisotropy, METALLIC oxides, MAGNETIC declination, MAGNETIC properties, ELECTRICAL steel |
| مستخلص: |
We examine the atomic intermixing phenomenon in three distinct amorphous CoB-based multilayer thin film platforms — Pt/CoB/Ir, Ir/CoB/Pt and Pt/CoB/MgO — which are shown to stabilise room-temperature chiral magnetic textures. Intermixing occurs predominantly between adjacent metallic layers. Notably, it is stack-order dependent, and particularly extensive when Ir sits atop CoB. Intermixing induced variations in magnetic properties are ascribed to the formation of magnetic dead layer arising from CoIr alloying in the metallic stacks. It also produces systematic variations in saturation magnetization, by as much as 30%, across stacks. Crucially, the resulting crossover CoB thickness for the transition from perpendicular to in-plane magnetic anisotropy differs by more than 2 across the stacks. Finally, with thermal annealing treatment over moderate temperatures of 150–300 °C, the magnetic anisotropy increases monotonically across all stacks, coupled with discernibly larger Hc for the metallic stacks. These are attributed to thermally induced CoPt alloying and MgO crystallization in the metallic and oxide stacks, respectively. Remarkably, the CoB in the Pt/CoB/MgO stacks retains its amorphous nature after annealing. Our results set the stage for harnessing the collective attributes of amorphous CoB-based material platforms and associated annealing processes for modulating magnetic interactions, enabling the tuning of chiral magnetic texture properties in ambient conditions. [ABSTRACT FROM AUTHOR] |
|
Copyright of Journal of Physics D: Applied Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Full Text Finder