Evolution of the interfacial magnetic anisotropy in MgO/CoFeB/Ta/Ru based multilayers as a function of annealing temperature

Journal Article · Wed Jun 15 00:00:00 EDT 2016 · AIP Advances

DOI:https://doi.org/10.1063/1.4954809· OSTI ID:22611573

Aleksandrov, Yuriy; Kowalska, Ewa ^[1]; Fowley, Ciarán; Sluka, Volker; Yıldırım, Oğuz; Lindner, Jürgen; Fassbender, Jürgen; Deac, Alina M. ^[1]; Ocker, Berthold ^[2]

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1. Helmholtz-Zentrum Dresden - Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstr. 400, 01328 Dresden (Germany)
2. Singulus Technologies AG, Kahl am Main (Germany)

We report the effect of annealing temperature on the dynamic and static magnetic properties of MgO/CoFeB/Ta/Ru multilayers. Angular resolved ferromagnetic resonance measurement results show that the as-deposited film exhibits in-plane magnetic anisotropy, whereas in the annealed films the magnetic easy-axis is almost along the direction perpendicular to the plane of the layers. The extracted interfacial anisotropy energy, K{sub i}, is maximized at an annealing temperature 225{sup ∘}C, in agreement with the vibrating sample magnetometry results. Although the magnetization is not fully out-of-plane, controlling the degree of the magnetization obliqueness may be advantageous for specific applications such as spin-transfer oscillators.

• OSTI ID: 22611573
• Journal Information: AIP Advances, Vol. 6, Issue 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
ANNEALING
BORON COMPOUNDS
COBALT COMPOUNDS
EVOLUTION
FERROMAGNETIC RESONANCE
FILMS
IRON COMPOUNDS
LAYERS
MAGNESIUM OXIDES
MAGNETIC PROPERTIES
MAGNETIZATION
OSCILLATORS
RUBIDIUM
SPIN
TANTALUM
TERNARY ALLOY SYSTEMS