Fig. 5: The quantum oscillations of SRO films in the low field regime.
From: The thickness dependence of quantum oscillations in ferromagnetic Weyl metal SrRuO3
a The −d2σ/d(1/H)2 versus 1/μ0H at T = 2.5 K for SRO films with five different ts ranging from about 7.7 to 35.3 nm. The curves with different ts are shifted vertically for clarity. The corresponding FFT spectra are shown in (b). The oscillation and FFT amplitude for Fs1 appears to show a larger magnitude for ts in the range of about 10–20 nm. For t ≈ 17.6 nm, the angle-dependent FFT spectra for different γ and θ angles are shown in the upper panel and lower panel, respectively, in (c). For t ≈ 18.7 nm, the angle-dependent quantum oscillations of dρ/d(μ0H) versus μ0H up to 35 T were plotted in d, where the bulk frequencies of F1−5 damped out at angles larger than 30o. The curves with different θ and γ values are shifted vertically for clarity. The extracted Fs1 as a function of γ and θ angles are shown in e and f, respectively. The error bars were from the standard deviations of the extracted Fs1 values at each angle using various fitting schemes. The red dashed lines represent the 1/cosθ and 1/cosγ dependence. The inset cartoon in e illustrates the orientation for the γ and θ angles.
