Fig. 3: Angular dependencies of converse magneto-photostrictive coupling coefficients and their maxima values.

Angular dependencies of the converse magneto-photostrictive coupling coefficient extremum value when H decreases, \({\alpha }_{{{{{{{{\rm{ext}}}}}}}}}^{\downarrow }\) (filled-in blue squares), and when H increases, \({\alpha }_{{{{{{{{\rm{ext}}}}}}}}}^{\uparrow }\) (red squares), for the (a) 5 nm and (b) 10 nm samples. Angular dependencies of the converse magneto-photostrictive coupling coefficient maximum value, \({\alpha }_{{{{{{{{\rm{CMP}}}}}}}},\max }^{410\,{{{{{{{\rm{nm}}}}}}}}}\) (blue filled-in circles), for the (c) 5 nm and (d) 10 nm samples. c The gray shaded area is an eye guide to indicate the converse magneto-electric coupling coefficient maximum value, \({\alpha }_{{{{{{{{\rm{CME,max}}}}}}}}}\), previously reported for a 5 nm FeGa sample (from²⁶). Dashed lines indicate the hard axis angular positions in the dark state. Continuous lines are guidelines to the eyes. φ is the angle between the applied magnetic field H and the [100] direction of the substrate.