Littérature scientifique sur le sujet « Magnetic nanoparticles, permanent magnets, magnetism »
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Articles de revues sur le sujet "Magnetic nanoparticles, permanent magnets, magnetism"
Sotelo, Diana C., Nancy Ornelas-Soto et Johann F. Osma. « Novel Magnetic Polymeric Filters with Laccase-Based Nanoparticles for Improving Congo Red Decolorization in Bioreactors ». Polymers 14, no 12 (8 juin 2022) : 2328. http://dx.doi.org/10.3390/polym14122328.
Texte intégralBagabas, Abdulaziz A., Khalil A. Ziq, Ahmad F. Salem et Emad S. Addurihem. « Magnetic Properties of Some Hydrated Transition Metal Oxide and Hydroxide Nanoparticles Synthesized in Different Media ». Advanced Materials Research 123-125 (août 2010) : 727–30. http://dx.doi.org/10.4028/www.scientific.net/amr.123-125.727.
Texte intégralPanina, Larissa V., Anastasiya Gurevich, Anna Beklemisheva, Alexander Omelyanchik, Kateryna Levada et Valeria Rodionova. « Spatial Manipulation of Particles and Cells at Micro- and Nanoscale via Magnetic Forces ». Cells 11, no 6 (10 mars 2022) : 950. http://dx.doi.org/10.3390/cells11060950.
Texte intégralImarah, Ali O., Fausto M. W. G. Silva, László Tuba, Ágnes Malta-Lakó, József Szemes, Evelin Sánta-Bell et László Poppe. « A Convenient U-Shape Microreactor for Continuous Flow Biocatalysis with Enzyme-Coated Magnetic Nanoparticles-Lipase-Catalyzed Enantiomer Selective Acylation of 4-(Morpholin-4-yl)butan-2-ol ». Catalysts 12, no 9 (17 septembre 2022) : 1065. http://dx.doi.org/10.3390/catal12091065.
Texte intégralFrolova, Liliya A. « Investigation of Magnetic and Photocatalytic Properties of CoFe2O4 Doped La3+, Nd3+, I3+ ». ECS Meeting Abstracts MA2022-01, no 30 (7 juillet 2022) : 2496. http://dx.doi.org/10.1149/ma2022-01302496mtgabs.
Texte intégralLiu, Yuan, Jie Lai et Yun Liu. « Preparation, Characterization, and Microwave Absorption Properties of Cobalt-Doped SrFe12O19 Nanoparticles ». Journal of Nanoelectronics and Optoelectronics 16, no 6 (1 juin 2021) : 998–1004. http://dx.doi.org/10.1166/jno.2021.3042.
Texte intégralTakeda, Shin-Ichi, Bungo Terazono, Fumihito Mishima, Hironori Nakagami, Shigehiro Nishijima et Yasufumi Kaneda. « Novel Drug Delivery System by Surface Modified Magnetic Nanoparticles ». Journal of Nanoscience and Nanotechnology 6, no 9 (1 septembre 2006) : 3269–76. http://dx.doi.org/10.1166/jnn.2006.483.
Texte intégralKaphle, Kishor, Gyanendra Karki et Amrit Panthi. « Alternative Approach for the Calculation of Magnetic Field due to Magnet for Magnetic Field Visualization and Evaluation ». Journal of the Institute of Engineering 15, no 1 (16 février 2020) : 150–60. http://dx.doi.org/10.3126/jie.v15i1.27724.
Texte intégralForringer, Edward Russell. « Measuring and Modeling the Force between Permanent Magnets ». Physics Teacher 60, no 7 (octobre 2022) : 546–48. http://dx.doi.org/10.1119/5.0058797.
Texte intégralHaneda, K. « Recent advances in the magnetism of fine particles ». Canadian Journal of Physics 65, no 10 (1 octobre 1987) : 1233–44. http://dx.doi.org/10.1139/p87-198.
Texte intégralThèses sur le sujet "Magnetic nanoparticles, permanent magnets, magnetism"
Matsumoto, Kenshi. « Crystal Structural Control of Nanomaterials toward High-Performance Permanent Magnets ». Kyoto University, 2019. http://hdl.handle.net/2433/245309.
Texte intégralAnagnostopoulou, Evangelia. « A new route for rare-earth free permanent magnets : synthesis, structural and magnetic characterizations of dense assemblies of anisotropic nanoparticles ». Thesis, Toulouse, INSA, 2016. http://www.theses.fr/2016ISAT0045/document.
Texte intégralThe objective of this thesis is the preparation of nanostructured rare earth free permanent magnets based on dense assemblies of Co nanorods. We demonstrate the up-scaling of the polyol process for the synthesis of 5 g of monodispersed cylindrical Co NR with controlled cylindrical-like shape. Modification of the nucleating agent allows optimizing further the nanorods’ shape, leading to the highest coercivity values measured. Dense and robust macroscopic magnets were obtained via the rods’ alignment under a magnetic field presenting an ideal hysteresis loop. Additional structural and magnetic characterization was accomplished via small angle neutron scattering. A quantitative assessment of the (BH)max values showed a maximum of 165 kJ·m-3. Preliminary compaction experiments resulted in the fabrication of bulk magnets with increased magnetic volume fraction (up to 30%). We prove that the bottom-up approach is very promising to get new hard magnetic materials that can compete in the permanent magnet panorama and fill the gap between the ferrites and the NdFeB magnets
Pousthomis, Marc. « De la synthèse chimique de nanoparticules aux matériaux magnétiques nano-structurés : une approche pour des aimants permanents sans terre rare ». Thesis, Toulouse, INSA, 2016. http://www.theses.fr/2016ISAT0012/document.
Texte intégralThe production of nano-structured permanent magnets is a promising alternative to rare earth magnets, which induced geopolitical and environmental issues. In order to elaborate such materials, we followed a bottom-up approach based on chemical methods. A first objective consisted in synthesizing hard magnetic nanoparticles (NPs) as building blocks for nano-structured magnets. The properties of cobalt nanorods (Co NRs) synthesized by the polyol process have been systematically studied. Coercive fields could be raised from 3 to 7 kOe by decreasing the diameter and improving the structural aspect ratio. Micro-magnetic simulations showed that a magnetization reversal following a nucleation and domain-wall propagation process could explain the experimental results. Bi-metallic FePt and tri-metallic FePtX (X = Ag, Cu, Sn, Sb) exhibiting the FCC structure were synthesized following two routes based on the reduction of an organometallic Fe precursor or of metallic acetylacetonates. Annealing at high temperatures (650°C for FePt, 400°C for FePtX) allowed the phase transition FCC L10 to occur, leading to high coercive fields (>12 kOe). A multi-steps process, involving the protection of FePt NPs with an MgO shell and an annealing at 850°C, was optimized to produce L10 FePt NPs with a mean size of 10 nm and a coercivity up to 27 kOe. In the second part of our study, we worked on assemblies of NPs with different magnetic anisotropies. Two systems were studied : FCC FePt+BCC FeCo, L10 FePt+HCP Co NRs. In both cases, the contact between the two types of NPs was favored by the presence of a bi-functional ligand followed by an annealing step. Concerning the FePt+FeCo system, the high temperature annealing (650°C), required to get the L10 FePt phase, led to the inter-diffusion of the phases and to the dissolution of the BCC FeCo phase. For the FePt+Co system, a spring magnet behavior has been clearly evidenced, the two phases being efficiently coupled The inter-diffusion of the phases was limited thanks to the fairly low annealing temperature (400°C). A coercive field of 10 kOe was measured for a Pt content as low as 25%at., eventhough the Co NRs anisotropic morphology was lost
Fersi, Riadh. « Intermétalliques magnétiques praséodyme-cobaltnanostructurés : étude multiéchelle et optimisation ». Thesis, Paris Est, 2012. http://www.theses.fr/2012PEST1127.
Texte intégralThis work falls within the general framework of the structural and magnetic nanomaterials based magnetic rare earth (R) and transition metal (T) whose domain of application concerns the permanent magnets or magnetic recording high density. In search of new magnetic phases in performance characteristics, we were interested in the alloy Pr2Co7. This compound has interesting hard magnetic properties: high Curie temperature and uniaxial magnetocrystalline anisotropy important. From the perspective of magnetic exchange interactions Co-Co are the strongest, followed by R-Co interaction, while the RR interactions are very weak. The dominance of Co-Co interactions induces relatively high Curie temperatures in compounds Pr2Co7.The magnetocrystalline anisotropy results from the combination of two networks uniaxial anisotropy praseodymium and cobalt. To strengthen these interactions, it is necessary to partially substitute cobalt in compounds Pr2Co7 by an appropriate element such as iron which has a radius slightly larger than that of cobalt or by insertion of a light element the hydrogen and carbon that can increase the interatomic distances and enhance the magnetic moment. Moreover, along with intrinsic magnetic properties improves, it is necessary to optimize the extrinsic magnetic properties of the alloy by the search for a suitable nanocrystalline state corresponding to the potential applications. The extrinsic properties of compounds Pr2Co7 have been little studied.Several methods were used for the development of nanomaterials. In our study, we have W arranty the technique of high energy milling followed by recrystallization controlled synthesis method which until then had not yet been used to synthesize this type of compound. At this scale, the grain size becomes of the order of magnitude of the exchange length. This method which is a non-equilibrium synthesis process, allows the production of nanostructured powders metastable from a mixture of elemental powders. This technique is particularly effective in the case of alloys based on rare earth (Pr, Sm ...) that are extremely volatile. Indeed, it avoids the liquid state since the reaction takes place below the melting temperature and led to reproducible and large quantities of homogeneous alloys. We used different characterization methods, namely: the X-ray diffraction (XRD), transmission electron microscopy (TEM) coupled with EDX analysis, the magneto / susceptometer Manics DSM-8
Patel, Anup. « Pulsed field magnetization of composite superconducting bulks for magnetic bearing applications ». Thesis, University of Cambridge, 2013. https://www.repository.cam.ac.uk/handle/1810/256579.
Texte intégralCedervall, Johan. « Magnetic Materials for Cool Applications : Relations between Structure and Magnetism in Rare Earth Free Alloys ». Doctoral thesis, Uppsala universitet, Institutionen för kemi - Ångström, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-331762.
Texte intégralLendínez, Escudero Sergi. « Magnetization dynamics at the nanoscale in nanoparticles and thin films : single-molecule magnets, magnetic vortices, and magnetic droplet solutions ». Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/395194.
Texte intégralLa investigación en materiales magnéticos ha dado lugar a nuevos dispositivos y tecnologías. A medida que la tecnología progresa, los dispositivos se hacen más pequeños. Esto permite una mayor capacidad de almacenamiento y reducir los costes de producción. A medida que se fabrican materiales más pequeños, surgen nuevos comportamientos. Los nanomateriales reúnen características tanto del mundo cuántico microscópico como del mundo clásico macroscópico. Esta escala de longitud se conoce como mesoescala. Existen variedad de forms de nanomateriales, entre las cuales nanopartículas y capas magnéticas ultrafinas. La composición de estos sistemas es diversa: las nanopartículas se obtienen a partir de reacciones químicas y las capas finas se crecen en un sustrato mediante técnicas de nanofabricación. La magnetización en las capas finas o en nanopartículas magnéticas grandes puede no ser uniforme, lo que lleva a la formación de dominios magnéticos. En todos estos sistemas, la dinámica de la magnetización da lugar a un nuevo comportamiento que no es visible en las mediciones estáticas: fenómenos cuánticas de la magnetización en imanes moleculares; frecuencias de resonancia características que se pueden utilizar para controlar el estado magnético de los vórtices; y la formación de solitones “droplet” magnéticos en capas finas con anisotropía magnética perpendicular. La comprensión de la dinámica de los nanomateriales y la evolución de la magnetización es un proceso clave para el desarrollo de dispositivos y tecnologías más rápidas. Los primeros estudios de imanes moleculares mostraron efectos cuánticos a escala macroscópica, que han permitido una mejor comprensión del espín. Los vórtices magnéticos se han propuesto para múltiples aplicaciones, desde el almacenamiento magnético de la información a la destrucción de células de cáncer. El solitón “droplet” magnético, descubierto recientemente, es también muy buen candidato para aplicaciones tecnológicas debido al bajo campo magnético y baja corriente necesarios para su generación. En esta tesis se muestran algunos nuevos fenómenos dinámicos. En la primera parte de la tesis, estudiamos sistemas que permite un modelo de macroespín, en el que no hay variaciones espaciales de la magnetización. En la segunda parte estudiamos la dinámica en sistemas con dominios magnéticos, lo cual requiere una dependencia espacial de la magnetización.
Silva, Tiago Luis da. « Síntese e auto-organização de nanopartículas ferromagnéticas metálicas visando aplicações em gravação magnética de ultra-alta densidade e imãs permanentes de elevado desempenho ». Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-24082015-094349/.
Texte intégralSmCo, fct-FePt and CoC nanomaterials have been studied for application in magnetic recording and permanent magnets due to theirs high coercivity and magnetocrystalline anisotropy. One-dimensional FePt nanoparticles were proposed to improve the magnetic alignment of self-assembled system. In this work, the formation of FePt nanorods and nanowires was studied by using a small amount of carbon monoxide from the precursor pentacarbonyliron(0) and oleylamine. Both parameters of synthesis were studied and was verified that they influence the one-dimensional growth of FePt. In fact, branched FePt nanowires with 20 - 100 nm of length and nanorods with 20 - 60 nm were obtained, both with 2-3 nm of diameters. The FePt nanoparticles were obtained in face centered cubic phase and the transformation to face centered tetragonal phase was carry out in the temperatures of 450 oC and 560 oC, which led the formation of sintered nanoparticles. FePt nanorods have better thermal stability than nanowires according the results obtained. The platinum nanorods covered with iron oxide also were obtained to formation of FePt by thermal treatment. In concern of SmCo syntheses, the formation of SmCo phase directly by chemical synthesis was investigated by using some reduction agent, but was obtained a small amount of smco phase only if the sodium borohydrate was used in the synthesis. This could be occurred due to high reducing potential of Sm3+ and its chemical instability. However, some methods were obtained to obtain CoO and SmCoO nanoparticles with size and shape control. Furthermore, cobalt carbide nanoparticles were well obtained with coercivity of 2,3 kOe and magnetization of 45 emu/g, and a new general method to obtain metals carbides was developed.
Edström, Alexander. « Theoretical and Computational Studies on the Physics of Applied Magnetism : Magnetocrystalline Anisotropy of Transition Metal Magnets and Magnetic Effects in Elastic Electron Scattering ». Doctoral thesis, Uppsala universitet, Materialteori, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-304666.
Texte intégralFelaktigt ISBN i den tryckta versionen: 9789155497149
Nakouri, Kalthoum. « Synthèse et caractérisation de poudres magnétiques pour aimants nanocomposites ». Thesis, Normandie, 2020. http://www.theses.fr/2020NORMR098.
Texte intégralThe synthesis of nanocomposite permanent magnets composed of a mixture of a hard magnetic phase, with high coercivity, and of a soft magnetic phase, with high magnetization, is one of the possible paths to obtain new rare earth free permanent magnets materials. In this work, the Fe65Co35 phase has been chosen as the soft phase and the SrFe12O19 phase has been chosen as the hard phase. Nanometric powders have been chemically synthesized, adapting existing processes. Fe65Co35 nanoparticles about 10 nm in size were synthesized by the polyol method, in the presence of RuCl3 as nucleating agent. The synthesis of SrFe12O19 nanoparticles was carried out by a so-called “modified sol-gel” method developed in this work. This method, which consists of calcination in a NaCl matrix, allows obtaining monodomain nanoparticles that are well dispersed and have magnetic properties superior to those obtained by the conventional sol-gel route. The assembly of hard and soft phases was carried out by a so-called "in-situ" method, for which SrFe12O19 nanoparticles are introduced into the reaction medium during the synthesis of the Fe65Co35 nanoparticles. Magnetic exchange coupling was obtained for nanocomposites with 5% and 10% Fe65Co35 phase contents
Livres sur le sujet "Magnetic nanoparticles, permanent magnets, magnetism"
Kübler, Jürgen. Theory of Itinerant Electron Magnetism, 2nd Edition. 2e éd. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780192895639.001.0001.
Texte intégralFurst, Eric M., et Todd M. Squires. Magnetic bead microrheology. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199655205.003.0008.
Texte intégralMichels, Andreas. Magnetic Small-Angle Neutron Scattering. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198855170.001.0001.
Texte intégralChapitres de livres sur le sujet "Magnetic nanoparticles, permanent magnets, magnetism"
Buschow, K. H. J., et F. R. de Boer. « Permanent Magnets ». Dans Physics of Magnetism and Magnetic Materials, 105–29. Boston, MA : Springer US, 2003. http://dx.doi.org/10.1007/0-306-48408-0_12.
Texte intégralde Moraes, Isabelle, et Nora M. Dempsey. « Nanocomposites for Permanent Magnets ». Dans New Trends in Nanoparticle Magnetism, 403–33. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-60473-8_17.
Texte intégralMcGrath, Andrew J., et Karthik Ramasamy. « Nanoparticles and nanocomposites for new permanent magnets ». Dans Nanoscience, 60–90. Cambridge : Royal Society of Chemistry, 2020. http://dx.doi.org/10.1039/9781788017053-00060.
Texte intégralLaptoiu, Dan Constantin, Iulian Antoniac et Aurora Antoniac. « Testing the Effect of Permanent Magnets on Magnetic Nanoparticles Ferrofluid – Targeted Delivery Inside Knee Articulation ». Dans DAAAM Proceedings, 0937–38. DAAAM International Vienna, 2011. http://dx.doi.org/10.2507/22nd.daaam.proceedings.457.
Texte intégralNascimento Correa, Tarcisio, Igor Nunes Taveira, Rogerio Presciliano de Souza Filho et Fernanda de Avila Abreu. « Biomineralization of Magnetosomes : Billion-Year Evolution Shaping Modern Nanotools ». Dans Biomineralization [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94465.
Texte intégralKennel, Charles F. « Introduction ». Dans Convection and Substorms. Oxford University Press, 1996. http://dx.doi.org/10.1093/oso/9780195085297.003.0004.
Texte intégralActes de conférences sur le sujet "Magnetic nanoparticles, permanent magnets, magnetism"
Suo, Jin, Sheng Tong, Michael McDaniel, Habib Samady, Robert W. Taylor, Gang Bao et Don Giddens. « Numerical Simulation of Magnetic Nanoparticles Targeted at an Atherosclerotic Lesion in the Left Coronary Artery of Patient ». Dans ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80029.
Texte intégralRusso, Alessandro, Silvia Panseri, Tatiana Shelyakova, Monica Sandri, Chiara Dionigi, Alessandro Ortolani, Steve Meikle et al. « Critical Long Bone Defect Treated by Magnetic Scaffolds and Fixed by Permanent Magnets ». Dans ASME 2013 2nd Global Congress on NanoEngineering for Medicine and Biology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/nemb2013-93193.
Texte intégralMasud, Md Abdulla Al, Noel D’Souza, Paris von Lockette et Zoubeida Ounaies. « On the Dielectrophoretic and Magnetic Alignment of Magnetoactive Barium Hexaferrite-PDMS Nanocomposites ». Dans ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3988.
Texte intégralZhao, Nannan, Dianli Zhao et Hongbin Ma. « Experimental Investigation of Magnetic Field Effect on the Magnetic Nanofluid Oscillating Heat Pipe ». Dans ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ht2012-58170.
Texte intégralSingh, Manpreet, Qimei Gu, Ronghui Ma et Liang Zhu. « Temperature Distribution and Thermal Dosage Affected by Nanoparticle Distribution in Tumours During Magnetic Nanoparticle Hyperthermia ». Dans ASME 2019 6th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/mnhmt2019-4233.
Texte intégralWilliams, Alicia, Ashok Sinha, Pavlos Vlachos et Ishwar K. Puri. « Magnetic Targeting of Particle Transport Under Pulsatile Flow ». Dans ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/fedsm2006-98124.
Texte intégralJiajia Sun, Zongqian Shi, Jun Bai, Shenli Jia et Pengbo Zhang. « Numerical investigation on the magnetic field of cylindrical permanent magnet for magnetic nanoparticles application ». Dans 2015 IEEE 15th International Conference on Nanotechnology (IEEE-NANO). IEEE, 2015. http://dx.doi.org/10.1109/nano.2015.7388799.
Texte intégralWilliams, Alicia M., et Pavlos P. Vlachos. « The Dynamics of Accumulating Ferrofluid Aggregates ». Dans ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/fedsm2008-55101.
Texte intégralZablotskii, Vitalii, José Martín Pastor, Silvia Larumbe, José Ignacio Pérez-Landazábal, Vicente Recarte, Cristina Gómez-Polo, Urs Häfeli, Wolfgang Schütt et Maciej Zborowski. « High-Field Gradient Permanent Micromagnets for Targeted Drug Delivery with Magnetic Nanoparticles ». Dans 8TH INTERNATIONAL CONFERENCE ON THE SCIENTIFIC AND CLINICAL APPLICATIONS OF MAGNETIC CARRIERS. AIP, 2010. http://dx.doi.org/10.1063/1.3530005.
Texte intégralRusso, A., S. Panseri, D. Casino, T. Shelyakova, A. Tampieri, N. Bock, V. Goranov et al. « Innovative Magnetic Nanoparticles Approaches for Bone and Osteochondral Tissue Engineering ». Dans ASME 2010 First Global Congress on NanoEngineering for Medicine and Biology. ASMEDC, 2010. http://dx.doi.org/10.1115/nemb2010-13114.
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