Dynamical study of remanent magnetization in nanoparticles |
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| Affiliation: | 1. Centre for Research on Inner City Health, Li Ka Shing Knowledge Institute, 209 Victoria Street, 3rd Floor, Toronto, ON M5B 1T8, Canada;2. Dalla Lana School of Public Health, University of Toronto, Health Sciences Building, 155 College Street, Toronto, ON M5T 3M7, Canada;3. Bloomberg Faculty of Nursing, University of Toronto, Health Sciences Building, 155 College Street, Toronto, ON M5T 3M7, Canada;4. Department of Psychology, Wilfrid Laurier University, Sciences Building, 75 University Avenue West, Waterloo, ON N2L 3C5, Canada;5. Department of Geography, Durham University IHRR326, Lower Mountjoy, South Road, Durham DH13LE, UK;1. Research Center for Resource Management and Solid Waste Engineering, University of Kassel, Mönchebergstraße 7, 34125 Kassel, Germany;2. Institute for Water Quality and Resource Management, TU Wien, Karlsplatz 13/226, 1040 Vienna, Austria;3. University of Novi Sad, Faculty of Technical Sciences, Department of Environmental Engineering, Trg Dositeja Obradovica 6, 21000 Novi Sad, Serbia;1. Research Group of EcoIndustrial System Analysis, Department of Environmental Science, Aarhus University, Frederiksborgvej 399, Postboks 358, DK-4000 Roskilde, Denmark;2. Aarhus University Centre for Circular Bioeconomy, Denmark;3. Hamburg University of Technology, Institute of Wastewater Management and Water Protection, Bioresource Management Group, Eissendorfer Str. 42, 21033 Hamburg, Germany;4. Research Group on Food Design and Sustainability, Department of Food Science, University of Copenhagen, Rolighedsvej 26, DK-1958, Frederiksberg, Denmark;1. Immanuel Kant Baltic Federal University, Kaliningrad, Russia;2. Department of Materials Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, Norway;3. Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia;4. Siberian Federal University, Krasnoyarsk, Russia;5. National University of Science and Technology MISiS, Moscow, Russia;6. Istituto di Struttura della Materia – CNR, Monterotondo Scalo, RM, Italy;7. Department of Chemistry and Industrial Chemistry (DCIC), Università of Genova, Genova, Italia;1. Marmara University, Department of Physics, 34722, Istanbul, Turkey;2. Istanbul Technical University, Faculty of Science and Letters, Department of Mathematics, 34469, Istanbul, Turkey;3. Bahcesehir University, Faculty of Engineering & Natural Sciences, Department of Mechatronics, 34349 Istanbul, Turkey |
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| Abstract: | ![]()
For collections of noninteracting nanoparticles, we study the reduced static remanent magnetization, mR, produced by the removal of a saturating magnetic field. We show that, except for special cases such as easy uniaxial anisotropy, mR depends on both the ramp-down rate of the field and the energy dissipation rate of the spin dynamics. Using the Landau–Lifshitz equation, we illustrate this result with explicit dynamical calculations of mR for cubic and for mixed cubic–uniaxial anisotropies. |
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