The recent advances in nanofabrication techniques have made it possible to engineer the magnetic and transport properties of thin magnetic films. The ability to design magnetic behavior is useful for technologies such as development of high-density hard disk drive (HDD) or magnetic random access memory (MRAM). In order to achieve high density in HDD, it is necessary to overcome the limit of super-paramagnetic effect. One way to solve this problem is to increase the anisotropic effect that can resist the external field and provide a net magnetic moment in remanence[1].

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