Perpendicular magnetic anisotropy of full-Heusler films in Pt/Co2FeAl/MgO trilayers
Xiaoqi Li, Shaoqian Yin, Yupeng Liu, Delin Zhang, Xiaoguang Xu, Jun, Miao, and Yong Jiang
TL;DR
This study demonstrates thermally stable perpendicular magnetic anisotropy in Pt/Co2FeAl/MgO trilayers with thick Co2FeAl layers, highlighting the influence of layer thicknesses and annealing on magnetic properties.
Contribution
It reveals a method to achieve stable perpendicular magnetic anisotropy in thick Heusler alloy films using specific layer structures and annealing conditions.
Findings
PMA with Ku of 1.3×10^6 erg/cm^3 in 2 nm Co2FeAl after annealing
Layer thicknesses significantly influence PMA
Thermal stability of PMA in the structure
Abstract
We report on perpendicular magnetic anisotropy (PMA) in a Pt/Co2FeAl/MgO sandwiched structure with a thick Co2FeAl layer of 2-2.5 nm. The PMA is thermally stable that the anisotropy energy density Ku is 1.3{\times}106 erg/cm3 for the structure with 2 nm Co2FeAl after annealing at 350 oC. The thicknesses of Co2FeAl and MgO layers greatly affect the PMA. Our results provide an effective way to realize relative thick perpendicularly magnetized Heusler alloy films.
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