Fig. 3: Angular dependence of the switching fields of CoFeB/FeRh.
The experimentally measured magnetic switching fields HcI (dots) and HcII (squares) as a function of the field orientation φ and the corresponding theoretical curves for Hc1 (red) and Hc1I (blue) for CoFeB(15nm)/FeRh(30nm) bilayers a at room temperature and c at 400K. Dependence of the uniaxial magnetic anisotropy \(K_u\) and the DW nucleation energies \(\varepsilon _{90^{\mathrm{o}}}\) and \(\varepsilon _{90^{\mathrm{o}} \pm 2\delta }\) on the CoFeB thickness \(t_{\rm{CoFeB}}\) obtained by fitting the angular dependent switching fields of CoFeB/FeRh bilayers to Eq. (1) b at room temperature and d at 400K. The curves indicate the corresponding theoretical fitting to \(K_u/M = K_u^S/Mt_{\rm{CoFeB}}\), \(\varepsilon _{90^{\mathrm{o}}}/M = \varepsilon _{90^{\mathrm{o}}}^S/Mt_{\rm{CoFeB}}\), and \(\varepsilon _{90^{\mathrm{o}} \pm 2\delta }/M = \varepsilon _{90^{\mathrm{o}} \pm 2\delta }^S/Mt_{\rm{CoFeB}}\).
