Insertion layer effects of ultrathin MgAl2O4 oxide on perpendicular magnetic anisotropy properties of Pt/Co2MnSi/MgAl2O4/Pt structures.
- Resource Type
- Article
- Authors
- Wang, Ke; Ling, Wolin; Xu, Zikun; Wu, Liang; Fu, Xiaoyong
- Source
- Materials Science & Engineering: B. Jun2023, Vol. 292, pN.PAG-N.PAG. 1p.
- Subject
- *PERPENDICULAR magnetic anisotropy
*MAGNETIC properties
*ENERGY density
*CARBON dioxide
- Language
- ISSN
- 0921-5107
• Strong perpendicular anisotropy is demonstrated in Pt/CMS/MAO/CMS/MAO/Pt structure. • Perpendicular anisotropy can be built with a total CMS thickness up to 6 nm. • Perpendicular anisotropy can be observed in the annealing temperature ranged from 300 to 400 °C. • Large interfacial perpendicular anisotropy energy density of 4.69 erg/cm2 is achieved. The effects of inserted ultrathin MgAl 2 O 4 (MAO) oxide on perpendicular magnetic anisotropy properties of sputtered Pt/Co 2 MnSi(CMS)/MAO/Pt stacks are investigated. We previously have shown that MAO capping is requisite in developing perpendicular magnetic anisotropy (PMA) in Pt/CMS/MAO/Pt structure and PMA can be built with CMS thickness of ∼3 nm. In this work, by introducing MAO layer to form Pt/CMS/MAO/CMS/MAO/Pt structure strong perpendicular anisotropy constant in the order of 106 erg/cm3 is demonstrated with a total CMS thickness up to 6 nm. For the annealed modified structure large perpendicular anisotropy energy density of 4.69 erg/cm2 is achieved. The large PMA observed can be mainly ascribed to proper oxidation at the extra interfaces of CMS/MAO/CMS and improved crystallinity of (1 1 1)-oriented Pt as well as possibly formed (1 1 1)-oriented CoPt alloy, revealed by x-ray diffractometry measurements. Our findings provide some useful information for designing CMS/MAO-based spintronic devices with strong PMA and good annealing stability. [ABSTRACT FROM AUTHOR]