Figure 1

Semilog $\theta \mathrm{\text{−}}2\theta$ XRD scans of the ${\mathrm{Sr}}_2{\mathrm{FeMoO}}_6$ films with thicknesses of 100 nm (red) and 200 nm (blue) grown on (a) ${\mathrm{SrTiO}}_3$, (b) ${\mathrm{Sr}}_2{\mathrm{CrNbO}}_6/\mathrm{LSAT}$, and (c) ${\mathrm{Sr}}_2{\mathrm{GaTaO}}_6$. The insets give the FWHM of rocking curves for the 100-nm ${\mathrm{Sr}}_2{\mathrm{FeMoO}}_6$ films: 0.129° (${\mathrm{SrTiO}}_3$), 0.015° (${\mathrm{Sr}}_2{\mathrm{CrNbO}}_6/\mathrm{LSAT}$), and 0.057° (${\mathrm{Sr}}_2{\mathrm{GaTaO}}_6$).Reuse & Permissions

Figure 2

Thickness dependence of (a) the in-plane lattice constant $a$ and (b) out-of-plane lattice constant $c$ of the ${\mathrm{Sr}}_2{\mathrm{FeMoO}}_6$ films grown on ${\mathrm{SrTiO}}_3$, ${\mathrm{Sr}}_2{\mathrm{CrNbO}}_6/{\mathrm{SrTiO}}_3$, ${\mathrm{Sr}}_2{\mathrm{CrNbO}}_6/\mathrm{LSAT}$, and ${\mathrm{Sr}}_2{\mathrm{GaTaO}}_6$.Reuse & Permissions

Figure 3

(a) Room-temperature FMR derivative spectra for a 50-nm ${\mathrm{Sr}}_2{\mathrm{FeMoO}}_6$ film on ${\mathrm{Sr}}_2{\mathrm{CrNbO}}_6/\mathrm{LSAT}$ at ${\theta }_H=0°$, 30°, 50°, and 90° (Inset: coordinate system used for FMR measurement and analysis) (b) Angular dependence (${\theta }_H$) of the resonance fields for the 50-nm ${\mathrm{Sr}}_2{\mathrm{FeMoO}}_6$ films grown on ${\mathrm{SrTiO}}_3$, ${\mathrm{Sr}}_2{\mathrm{CrNbO}}_6/{\mathrm{SrTiO}}_3$, ${\mathrm{Sr}}_2{\mathrm{CrNbO}}_6/\mathrm{LSAT}$, and ${\mathrm{Sr}}_2{\mathrm{GaTaO}}_6$. The fitting (solid curves) was performed using Eqs. (1, 2) to obtain $4\pi M_{\mathrm{eff}}$, from which $H_{2\perp }$ was determined for each film. (c) $H_{2\perp }$ of all the ${\mathrm{Sr}}_2{\mathrm{FeMoO}}_6$ films as a function of $\eta /t$ (mismatch/thickness). The solid line is the least-squares fit to all the data points excluding the two on the very left and the one on the far right ($t=50\mathrm{nm}$ for all three points). (d) $H_{2\perp }$ vs tetragonality $(c-a)/a$ of the ${\mathrm{Sr}}_2{\mathrm{FeMoO}}_6$ films. All the experimental data fall nicely onto a straight line, indicating strain-induced magnetocrystalline anisotropy. (e) Anisotropy energy $E_{\mathrm{ani}}$ as a function of tetragonality.Reuse & Permissions