[en] The temperature dependence of photoinduced change of magnetic permeability (PICMP) in monocrystals Y₃Fe₅O₁₂:Si is studied. The studied temperature range is 77-300 K. The experimental results demonstrate noticeable changes in photomagnetic properties of mono- and polycrystals, as well as monocrystals grown by different, frequently rather insignificantly methods. It is assumed that these differences are related to the inhomogeneous distribution of an alloying impurity over the crystal volume, as well as the presence of uncontrolled additions and oxygen vacancies in it. The maximum temperature, when PICMP was observed, is 265 K