The dynamical response to the node defect in thermally activated remagnetization of magnetic dot array

• Published in: Journal of magnetism and magnetic materials Vol. 320; no. 6; pp. 1083 - 1088
• Main Authors: Baláž, P., Horváth, D., Gmitra, M.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.03.2008; Elsevier Science
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Critical-point effects, specific heats, short-range order; Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.); Exact sciences and technology; Magnetic dot array; Magnetic hysteresis; Magnetic properties and materials; Magnetic relaxation; Physics; Stochastic Landau–Lifshitz–Gilbert equation; Thermal activation; 74.25.Fy; 02.70.Bf; Magnetic relaxation; Thermal activation; Stochastic Landau–Lifshitz–Gilbert equation; 61.80.Az; 74.72.Bk; Magnetic hysteresis; Magnetic dot array; Stochastic model; Stochastic Landau-Lifshitz-Gilbert equation; Magnetization; 02.70.Bf Magnetic dot array; Dynamic properties; Computerized simulation; Defects; Activation energy; Landau Lifshitz equation
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2007.10.028

The influence of nonmagnetic central node defect on dynamical properties of regular square-shaped segment of magnetic dot array under the thermal activation is investigated via computer simulations. Using stochastic Landau–Lifshitz–Gilbert equation we simulate hysteresis and relaxation processes. The remarkable quantitative and qualitative differences between magnetic dot arrays with nonmagnetic central node defect and magnetic dot arrays without defects have been found.