In this master thesis, it was carried out a numerical and experimental approach for studying the magnetic properties of exchange graded ferromagnets, by using the Monte Carlo method and VSM magnetometry. Specifically, it was studied the spatial evolution of the ferromagnetic phase transition, that emerges when considering a depth-dependent magnetic exchange profile. Numerical and experimental results corroborate prior findings, showing the dominance of the localized thermodynamic nature on the overall measured and simulated net magnetic behavior of the samples. Based on simulation results, it was estimated the length scale at which collective effects can be suppressed in the system, i.e., the length scale to which the effect of the interlayer exchange coupling strength between neighboring layers can be massively reduced. Then, it was derived an analytical expression, only in terms of local material properties, to predict the spatial evolution of the ferromagnetic phase transition in these materials. It was possible to find out that the temperature range of the phase transition can be precisely adapted by controlling the rate of change of the magnetic exchange strength along the gradient direction. Therefore, numerical and predictive modeling, accompanied by experimental observations in samples with epitaxial growth, make explicit how the temperature range of the ferro-paramagnetic phase transition in exchange graded materials depends on the ability to control and manipulate magnetism at the nanoscale. This is important to recognize since, in real materials, this temperature span could scale up to tens or even hundreds of degrees, as corroborated by experiments. To assess the magnetocaloric properties of wave-like modulated exchange graded materials, it was performed simulations of the field-dependent magnetization at several constant temperatures. Overall, it was possible to observe that the magnetocaloric properties can be tailored precisely by inducing depth-dependent exchange strength modulations in the sample. This thesis includes comparisons with actual experimental magnetic characterization of epitaxial samples, featuring depth-dependent variations in the concentration of non-magnetic ions along the growth direction. These experimental observations, exhibit an outstanding qualitative agreement with simulations results, validating the predictive powers of the local magnetic properties description, and the realization of the precise tailoring of the net magnetic response of the samples. Furthermore, numerical estimations corroborate that the magnetic entropy change exhibits a universal and scaling behavior, for the explored magnetic exchange profile, regarding the exchange strength of individual layers within the graded sample. The results presented in this thesis, bring forward the potential suitability of exchange graded thin films for the development and fundamental study of magnetic refrigeration techniques.