This work examines the complex interaction between acoustic pressure, photothermal excitation, and magnetic fields in a nonlocal semiconductor material according to the dual phase lag thermoelastic model. An extensive theoretical framework is employed to investigate the dynamic behavior of the semiconductor system, encompassing a wide range of physical phenomena when the thermal conductivity is variable to modify the heat conduction equation. An investigation is carried out using theoretical analysis and numerical simulations to comprehend the complex interaction between these fundamental physical processes. By including the relevant equations in our simulations, we can examine the impact of the magnetic field on the thermal-mechanical characteristics of the medium. The magnetic field and acoustic pressure combine to generate complex variations in temperature, strain, and displacement. The harmonic wave approach is employed to get the analytical expression of the fundamental physical fields, including temperature, mechanical stress, displacement, carrier density, and acoustic pressure, by mathematical means. The theoretical findings are examined and visibly shown due to the powerful magnetic field of the nonlocal semiconductor medium according to changes in thermal conductivity.