Dynamical properties of magnetization reversal in an ultrathin AuCo film |
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| Institution: | 1. Laboratoire de Physique des Solides, S.N.C.M.P, I.N.S.A, Complexe Scientifique de Rangueil, 31077 Toulouse, France;2. Université Moulay Ismaïl, Faculté des Sciences, B.P. 4010 Meknes, Morocco;1. Faculty of Applied Science and Engineering, Nong Khai Campus, Khon Kaen University, Nong Khai 43000, Thailand;2. Department of Electrical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, Thailand;3. Department of Physics & Astronomy, MINT Center, University of Alabama, Tuscaloosa, AL 35487, USA;1. Department of Physics, Pamukkale University, Kinikli Campus, 20020 Denizli, Turkey;2. Department of Material Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA;1. Department of Chemistry and Institute of BioPhysio Sensor Technology (IBST), Pusan National University, Busan 46241, South Korea;2. Institute of BioPhysio Sensor Technology (IBST), Pusan National University, Busan 46241, South Korea;3. Busan Center, Korea Basic Science Institute (KBSI), Busan 46742, South Korea |
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| Abstract: | We present a dynamical study of hysteresis loops of a MoS2/Au/Co/Au] sandwich performed by surface magneto-optical Kerr effect with a field variation rate up to 1.2 MOe/s. An interpretation of dynamical effects at room temperature is proposed, using a modelization of the magnetization reversal. We discuss simulations which describe two different processes of the magnetization reversal to interpret the evolution of the hysteresis loops for several rates of variation of the magnetic field. For a first range of field variation rates lower than 180 kOe/s, the predominant mechanism seems to be wall motion and beyond 180 kOe/s, an expression for the magnetization is given, which supposes micro-domains reversal as a prevailing process. Finally, the general behaviour of the relaxation time, depending on the magnetic field, is investigated. |
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