Despite growing interest in one-dimensional (1-D) arrays of spherical nanomagnets for applications in data storage and medical technologies, the precise control of inter-sphere distance on magnetization reversal in solid sphere arrays remains unclear. This study addresses this gap using micromagnetic simulations to investigate the magnetic behavior of a single 10 nm diameter La0.7Sr0.3MnO3 (LSMO) nanosphere and a 1-D array of ten such spheres. We systematically vary the interfacial distance (d) from 0 to 10 nm, analysing responses to magnetic fields along both short and long axes. Our findings reveal a striking enhancement in the coercive field (HC) for the array at d = 0 nm, reaching approximately 0.206 T along the long axis, a significant 3.5-times increase compared to a single nanosphere (HC = 0.06 T). A detailed analysis shows a transition from incoherent to coherent magnetization switching as the changing in the field direction and d. At larger d values, the array's magnetic characteristics converge with those of an isolated nanosphere due to minimized dipolar interactions. The spin configuration analysis highlights the presence of an uncompensated spins at the array's top and bottom end. Comprehensive energy analysis indicates the demagnetization energy as the dominant contributor at the switching field. We also observe the spin-canting angle, increasing with decreasing d, suggesting easier switching along the short axis. These results underscore the critical role of interfacial distance in tuning magnetic interactions and spin configurations, offering insights for designing next-generation spintronic and high-density storage devices.
