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Diluted magnetic semiconductors (DMS) have been studied extensively over the past decade for their possible applications in electronic and optoelectronic devices based on spin polarized carriers. With the successful growth of DMS materials like (In,Mn)As and (Ga,Mn)As, III-Mn-V have become very important because of their higher Curie temperatures and strong remnant magnetization compared to II-Mn-VI DMS. We have recently measured long spin-relaxation times in self-organized InAs/GaAs quantum dots. Therefore, it is of interest to study the ferromagnetic properties of self-organized (In,Mn)As diluted magnetic quantum dots.