Investigation of magnetic properties of interacting Fe2O3 nanoparticles |
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| Affiliation: | 1. Key Laboratory of Optoelectronic Information Materials of Hebei Province, Key Laboratory of Digital Medical Engineering of Hebei Province, College of Electronic and Information Engineering, Hebei University, Baoding 071002, PR China;2. Department of Materials Science and Engineering, National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;1. Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India;2. CMP Division, Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata 700 064, India;1. Department of Physics and Astronomy, Wayne State University, Detroit, MI 48201, USA;2. Department of Physics, Arkansas Tech University, Russellville, AR 72801, USA;1. Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia;2. Department of Chemistry, Istanbul Medeniyet University, 34700 Uskudar, Istanbul, Turkey;3. Department of Nanomedicine Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia;1. Key Laboratory of Advanced Batteries Physics and Technology (Ministry of Education), College of Physics, Jilin University, Changchun 130012, PR China;2. Institute for Applied Materials (IAM), Karlsruhe Institute of Technology (KIT), D-76344 Eggenstein-Leopoldshafen, Germany;1. Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia;2. Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia;3. Department of Nanomedicine Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia;4. Deanship of Preparatory Year, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia |
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| Abstract: | The magnetic properties of Fe2O3 nanoparticles (average diameter ∅≅3 nm) in alumina (68% Fe2O3 in weight) have been investigated by magnetization measurements. The results indicate a superparamagnetic behavior of interacting particles, which block with decreasing temperature (the zero-field-cooled susceptibility shows a maximum at T≅145 K) with a distribution of relaxation times. A change of magnetic regime is observed below ∼60 K, due to the increasing interparticle interactions and local surface anisotropy. |
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