研究目的
Investigating the factors governing Dzyaloshinskii domain-wall creep in Co/Ni thin films using PtxIr1?x seed layers.
研究成果
The study demonstrates a monotonic increase of DMI with Pt content in PtxIr1?x seed-layer alloys and shows that the impact of DMI on elastic energy alone is insufficient to explain the trends in velocity curves. A chirality-dependent attempt frequency is necessary to fit the experimental data, suggesting a possible intrinsic mechanism for chiral effects in Co/Ni multilayers.
研究不足
The study is limited to Co/Ni multilayers and PtxIr1?x seed layers, and the findings may not be directly applicable to other material systems. The exact mechanism behind the chirality-dependent attempt frequency remains unclear.
1：Experimental Design and Method Selection:
The study uses a refined model of domain wall creep incorporating anisotropic elastic energy and a chirality-dependent prefactor to analyze the mobility of Dzyaloshinskii domain walls.
2：Sample Selection and Data Sources:
Co/Ni multilayers grown on PtxIr1?x seed layers were prepared using DC magnetron sputtering.
3：List of Experimental Equipment and Materials:
A wide-field white light Kerr microscope, in-plane electromagnet, perpendicular coil, and Ga+ ion beam for selective damage.
4：Experimental Procedures and Operational Workflow:
Velocity was determined by images showing domain wall positions before and after a single pulse.
5：Data Analysis Methods:
The study uses Brillouin light scattering spectroscopy to measure the DMI magnitude.
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