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Magnetic materials are a very important issue in energy convert and transport and their efficiency is gettingmore importance concerning renewable energies and global warming. Nevertheless there is scarceinformation about optimization of magnetic properties and even more in the relation between magnetism andthe microstructure of the material. It is known that order, recovery and recrystallization resulted in asignificant improvement of magnetic properties. Soft magnetic materials are commonly used as magneticcores of transformers, choke inductors and electric motors.In this work was evaluated the magnetic response of Fe-Si, Fe-Al-Si, Fe-Ge, Fe-Al-Ge alloys as a function ofthe annealing temperature. Checked samples were homogenized at 1050°C during 1 hour under highvacuum and quenched in room temperature water. Annealing treatments were realized step by step byincreasing in 50°C starting from room temperature up to 1050°C. Annealing was made with a temperatureincrease of 1.5C/min under high vacuum. Magnetic cycles were recorded at room temperature in alaboratory assembled automatic loop tracer. The average of 10 cycles was considered for each sample andannealing temperature.The evolution of the characteristics parameters of the magnetic loop, i.e., the saturation magnetization, thecoercive force and the area of the loop as a function of the annealing temperature is shown. The physicalmechanisms controlling the behavior of the magnetic response are discussed on the basis of both recoveryand evolution of the order degree of the microstructure.