Interlayer Coupling and High-Frequency Performance in Magnetic Anisotropic FeCoB/Hf/FeCoB Trilayers with Various Hf Thicknesses
نویسندگان
چکیده
FeCoB (25 nm)/Hf(tHf)/FeCoB nm) sandwich films with different hafnium thicknesses tHf were fabricated using a modified compositional gradient sputtering method to obtain self-biased high-frequency performances. The effects of on the interlayer coupling and FMR frequency investigated. It is revealed that enhanced resonance by 48%, ferromagnetic between occurred for trilayers < 3.0 nm, likely due interface roughness pinhole effect. In this case, only acoustic mode was observed same performance as corresponding single layer. contrast, tHf-dependent antiferromagnetic appeared at > nm. coefficient J1 antiferromagnetic, biquadratic J2 3.5 mechanism simulated verified Layadi’s rigid model, simulation consistent experimental results.
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ژورنال
عنوان ژورنال: Magnetochemistry
سال: 2022
ISSN: ['2312-7481']
DOI: https://doi.org/10.3390/magnetochemistry8060065