<p>In this work, we develop and characterise isotropic magnetorheological elastomers (MREs) composed of evenly distributed flake-shaped electrolytic iron particles (EIPs) within a silicone elastomer matrix. The study examines how temperature, magnetic field strength, and particle shape influence the stress relaxation and magneto-mechanical behaviour of MREs. Experimental results demonstrate that incorporating flake-shaped EIPs substantially enhances the magneto-responsive properties of the MREs. Compared to spherical particles, flake-shaped particles offer better interfacial interactions and mechanical reinforcement, and the formation of internal particle chains under applied magnetic fields increases the storage modulus. Research on stress relaxation indicates that magnetic fields slow down the stress decay rate and extend relaxation times, suggesting enhanced energy retention. At higher temperatures, temperature-dependent studies reveal a decrease in the magneto-field modulus (MFM) and accelerated stress relaxation, due to increased polymer chain mobility and the reorientation of magnetic particles. These findings demonstrate the opposing effects of thermally induced softening and magnetic-field-induced stiffening. This work supports the application of flake-based MREs in adaptive systems, including soft robotics, actuators, and vibration-damping devices across various thermal environments. It provides valuable insights into the temperature-sensitive viscoelastic response of these materials.</p>