Magnetic materials are used in many devices for various applications. To optimize the performance of these devices, we need to characterize the materials as best as we can. In this paper and presentation, I studied magnetic properties of an alloy, CoFeB, in a multilayer structure. CoFeB alloy is used in a new type of memory that is called “STT-MRAM”. This type of memory is more energy efficient, denser, smaller, and cheaper compared to conventional memories.