Modeling of the blocking temperature of a system of core/shell nanoparticles |
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| Institution: | 1. Faculty of Science, Menoufiya University, Shebin El-Kom 32511, Egypt;2. Faculty of Science, Mansoura University, Mansoura 35516, Egypt;3. Department of Mathematics, College of Science, Taibah University, Al-Madinah, Al-Munawarah, Saudi Arabia;1. Université Tunis el Manar, Laboratoire de nanomatériaux et des systèmes pour les énergies renouvelables (LANSER), Centre de Recherches et des Technologies de l''Energie, BP.95 Hammam Lif 2050, Tunisia;2. Université de Monastir, Faculté des Sciences de Monastir, Laboratoire de la Matière condensée et des nanosciences, LR 11 ES 40, Monastir, 5019, Tunisia;3. Institut Néel, CNRS et Université Joseph Fourier, B, P, 166, 38042 Grenoble, France;1. Department of Physics, Beijing Jiaotong University, Beijing 100044, China;2. Key Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University, Beijing 100044, China;1. Space Science Center (ANGKASA), Universiti Kebangsaan Malaysia, 43600 UKM, Selangor, Malaysia;2. Dept. of Electrical, Electronic & Systems Engineering, Universiti Kebangsaan Malaysia, 43600 UKM, Selangor, Malaysia;3. Adjunct Faculty, Department of Mechanical Engineering, Sonargaon University, Dhaka-1215, Bangladesh |
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| Abstract: | A theoretical study was conducted on the size dependence of the blocking temperature Tb of a system of interacting core/shell nanoparticles. A method for estimating the blocking temperature of interacting core/shell nanoparticles is presented, which allows Tb to be calculated more precisely than using the “Neel relation”. It was shown that with an increase in the intensity of the magnetostatic interaction (concentration of nanoparticles), the blocking temperature increases, while the growth of the external magnetic field leads to the opposite effect. Moreover, the Tb of large nanoparticles changes more significantly. Comparing different approaches, we identify a precise method for determining the blocking temperature from ZFC and FC magnetization curves. |
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