The existence of magnetic fields in the universe is unmistakable. They are observed at all scales from stars to galaxy clusters. However, the origin of these fields remains enigmatic. It is believed that magnetic field seeds may have emerged from inflation, under certain conditions. This possibility is analised in the context of an alternative theory of gravity with non-minimal coupling between curvature and matter. We find, through the solution of the generalised Maxwell equations in the context of non-minimal models, that for general slow-roll inflationary scenarios with low reheating temperatures, \(T_{RH}\simeq 10^{10}\hbox {GeV}\), the generated magnetic fields can be made compatible with observations at large scales, \(\lambda \sim 1 Mpc\).

宇宙中存在磁场是不言而喻的。它们在从恒星到星系团的所有尺度上都可以观察到。然而，这些领域的起源仍然是个谜。人们认为，在某些条件下，磁场种子可能是从暴胀​​中出现的。这种可能性在另一种重力理论的背景下进行了分析，其中曲率和物质之间的耦合非最小。我们通过在非最小模型背景下求解广义麦克斯韦方程，发现对于低再热温度的一般慢滚动暴胀情景，\(T_{RH}\simeq 10^{10}\hbox {GeV }\)，生成的磁场可以与大尺度观测兼容，\(\lambda \sim 1 Mpc\)。