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Magneto-optic Kerr Effect and Magnetic Properties of Ferromagnetic Semiconducting MnGeAs2 Thin Films
최정용,Wuwei Feng,Weiqiang Mu,J. B. Ketterson,C.-C. Tsai,조성래 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.1
We have studied the magneto-optic Kerr effect (MOKE) and static magnetic properties of MnGeAs2 films grown by using molecular beam epitaxy (MBE) and prepared in different arsenic ambiences. Both reflection high energy electron diffraction (RHEED) and θ-2θ X-ray diffraction confirm epitaxial growth. We have observed the As pressure dependency in MOKE hysteresis and a well-defined rectangular MOKE hysteresis in the film grown at a 1.8 × 10−6 Torr As pressure. These As pressure dependent magnetic properties are related to defects in the MnGeAs2 films.