Effect of Annealing on Perpendicular Magnetic Anisotropy and Low Saturation Magnetization of MgO/Co{sub 2}FeAl/Mo Trilayer Films

Journal Article · Mon Jul 15 04:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-018-4898-Y· OSTI ID:22921210

Saravanan, L.; Kokila, I. Phebe ^[1]; Raja, M. Manivel ^[2]; Prabhu, D. ^[3]

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1. SRM Institute of Science and Technology, Nanotechnology Research Centre (India)
2. Defence Metallurgical Research Laboratory, Advanced Magnetics Group (India)
3. International Advanced Research Centre for Powder Metallurgy and New Materials (India)

In this study, we report our approach to manipulate the strength of perpendicular magnetic anisotropy (PMA) at oxide/ferromagnetic metal of Heusler alloy (HA) interface by tuning the parameter of annealing temperature. Robust PMA energy density (K{sub eff}) of ∼ 0.43 × 10{sup 6} erg/cm{sup 3} and small saturation magnetization (M{sub s}) as low as ∼ 248 emu/cm{sup 3} have been achieved for MgO/Co{sub 2}FeAl (CFA)/Mo stacks at 400 {sup ∘}C. We identify that PMA energy is thermally stable up to the maximum temperature of 400 {sup ∘}C. Effect of annealing temperature on surface morphology, grain distribution, and surface roughness of the stacks are investigated by atomic force microscopy (AFM). Further, X-ray photoelectron spectroscopy (XPS) study demonstrates that the interfacial oxidation decides the strong PMA property at MgO/Co{sub 2}FeAl interface during the annealing process. This MgO/CFA/Mo trilayer system can be a suitable candidate for the development of low-power consumption, huge-density data storage, high-thermal stability against the annealing temperature, and nonvolatile magnetic memories.

• OSTI ID: 22921210
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 7 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM COMPOUNDS
ANISOTROPY
ANNEALING
ATOMIC FORCE MICROSCOPY
COBALT COMPOUNDS
DISTRIBUTION
ENERGY DENSITY
FILMS
HEUSLER ALLOYS
IRON COMPOUNDS
MAGNESIUM OXIDES
MAGNETIZATION
MOLYBDENUM
OXIDATION
SATURATION
TERNARY ALLOY SYSTEMS
X-RAY PHOTOELECTRON SPECTROSCOPY