Magnetic Nanoparticles

Magnetic Nanoparticles

Author: Abdollah Hajalilou

Publisher: John Wiley & Sons

Published: 2022-10-03

Total Pages: 357

ISBN-13: 3527350977

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Magnetic Nanoparticles Learn how to make and use magnetic nanoparticles in energy research, electrical engineering, and medicine In Magnetic Nanoparticles: Synthesis, Characterization, and Applications, a team of distinguished engineers and chemists delivers an insightful overview of magnetic materials with a focus on nano-sized particles. The book reviews the foundational concepts of magnetism before moving on to the synthesis of various magnetic nanoparticles and the functionalization of nanoparticles that enables their use in specific applications. The authors also highlight characterization techniques and the characteristics of nanostructured magnetic materials, like superconducting quantum interference device (SQUID) magnetometry. Advanced applications of magnetic nanoparticles in energy research, engineering, and medicine are also discussed, and explicit derivations and explanations in non-technical language help readers from diverse backgrounds understand the concepts contained within. Readers will also find: A thorough introduction to magnetic materials, including the theory and fundamentals of magnetization In-depth explorations of the types and characteristics of soft and hard magnetic materials Comprehensive discussions of the synthesis of nanostructured magnetic materials, including the importance of various preparation methods Expansive treatments of the surface modification of magnetic nanoparticles, including the technical resources employed in the process Perfect for materials scientists, applied physicists, and measurement and control engineers, Magnetic Nanoparticles: Synthesis, Characterization, and Applications will also earn a place in the libraries of inorganic chemists.


Synthesis and Characterization of Metal Oxide Composite Materials for Permanent Magnetic Applications

Synthesis and Characterization of Metal Oxide Composite Materials for Permanent Magnetic Applications

Author: Aleksey Volodchenkov

Publisher:

Published: 2012

Total Pages: 72

ISBN-13: 9781267731784

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State of the art magnets depend heavily on the use of rare-earth materials and cost 10 to 20 times more than other magnets such as ferrite magnets, per weight. In addition, the global supply of crucial rare-earth elements is uncertain, causing a real threat to the magnetic industry. Effective use of exchange coupling between hard and soft magnetic materials could decrease reliance on rare-earth based magnetic materials and lower the cost of high performance permanent magnets. Despite the promise, engineering a composite permanent magnetic material with enhanced magnetic properties as a result of exchange coupling has been an elusive goal. Research described in this thesis centers on the synthesis and characterization of metal-oxide 3D bulk composite materials for permanent magnetic applications. Samples were densified from powders using the Current Activated Pressure Assisted Densification (CAPAD) apparatus. A range of samples with densities as high as 97% relative density have been synthesized in relatively short times (~10 minutes). Samples have been shown through X-ray diffraction (XRD) to contain desired composition, and are indeed hard and soft magnetic composites. The applied pressure has been shown to play a significant role in increasing density and in turn improving the magnetic properties. Enhanced magnetic saturation of the composite material, as compared to the mass dominant hard phase has been observed.


Soft Magnetic Materials and Their Application

Soft Magnetic Materials and Their Application

Author: Shenglei Che

Publisher:

Published: 2024-03-18

Total Pages: 0

ISBN-13: 9783725806164

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This reprint is a collection of papers published in the Special Issue "Soft Magnetic Materials and Their Application". The aim of this Special Issue was to present the latest achievements in the synthesis, fundamentals, characterization, and applications of soft magnetic materials, including soft ferrites, alloys, and composites, together with their processing technology, characterization, and applications in electronics, motors, wave absorbing, sensors, communications, etc. Seventeen papers are published in this Special Issue. For convenience of reading, these papers can be divided into four categories according to the contents of their studies: I. Soft Ferrite Materials; II. Soft Magnetic Alloys and Composites; III. Characterization of Soft Magnetic Materials; and IV. Applications of Soft Magnetic Materials.


SYNTHESIS AND CHARACTERIZATION OF ADVANCED MAGNETIC MATERIALS.

SYNTHESIS AND CHARACTERIZATION OF ADVANCED MAGNETIC MATERIALS.

Author:

Publisher:

Published: 2005

Total Pages:

ISBN-13:

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The work described in this grant report was focused mainly on the properties of novel magnetic intermetallics. In the first project, we synthesized several 2:17 intermetallic compounds, namely Nd[sub 2]Fe[sub 15]Si[sub 2], Nd[sub 2]Fe[sub 15]Al[sub 2], Nd[sub 2]Fe[sub 15]SiAl and Nd[sub 2]Fe[sub 15]SiMn, as well as several 1:12 intermetallic compounds, such as NdFe[sub 10]Si[sub 2], NdFe[sub 10]Al[sub 2], NdFe[sub 10]SiAl and NdFe[sub 10]MnAl. In the second project, seven compositions of Nd[sub x]Fe[sub 100-x-y]B[sub y] ribbons were prepared by a melt spinning method with Nd and B content increasing from 7.3 and 3.6 to 11 and 6, respectively. The alloys were annealed under optimized conditions to obtain a composite material consisting of the hard magnetic Nd[sub 2]Fe[sub 14]B and soft magnetic [alpha]-Fe phases, typical of a spring magnet structure. In the third project, intermetallic compounds of the type Zr[sub 1]Cr[sub 1]Fe[sub 1]T[sub 0.8] with T = Al, Co and Fe were subjected to hydrogenation. In the fourth project, we performed three crucial experiments. In the first experiment, we subjected a mixture of Fe[sub 3]O[sub 4] and Fe (80-20 wt %) to mechanochemical activation by high-energy ball milling, for time periods ranging from 0.5 to 14 hours. In the second experiment, we ball-milled Fe[sub 3]O[sub 4]:Co[sup 2+] (x = 0.1) for time intervals between 2.5 and 17.5 hours. Finally, we exposed a mixture of Fe[sub 3]O[sub 4] and Co (80-20 wt %) to mechanochemical activation for time periods ranging from 0.5 to 10 hours. In all cases, the structural and magnetic properties of the systems involved were elucidated by X-ray diffraction (XRD), Moessbauer spectroscopy and hysteresis loop measurements. The four projects resulted in four papers, which were published in Intermetallics, IEEE Transactions on Magnetics, Journal of Materials Science Letters and Materials Chemistry and Physics. The contributions reveal for the first time in literature the effect of substitutions on the hyperfine magnetic field of neodymium-based intermetallics, the correlation between structure and magnetic properties in spring magnets, the unique effects induced by hydrogenation on the hyperfine parameters of iron-rich intermetallics and the characteristics of the ball milling process in systems containing magnetite.


Magnetic Nanomaterials

Magnetic Nanomaterials

Author: Uyiosa Osagie Aigbe

Publisher: Springer Nature

Published: 2023-08-19

Total Pages: 275

ISBN-13: 3031360885

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This book explores some of the latest and recent advances in the synthesis, characterization and applications of magnetic nanomaterials. It starts with an overview of magnetic nanomaterials, followed by a list of their synthesis and characterization methods. The book shows the potential of magnetic materials in different applications, including theranostic nanomedicine, heavy metals detection, dyes sensing, solar cells, wastewater treatment, decontamination of soil, and detection and monitoring of toxic gases. Moreover, it explores their use as drug and gene delivery agents, their biosafety and bioregulation facets, tissue engineering applications, and their potential for combating pathogens


Characterization and Measurement of Magnetic Materials

Characterization and Measurement of Magnetic Materials

Author: Fausto Fiorillo

Publisher: Academic Press

Published: 2004-12-07

Total Pages: 667

ISBN-13: 0080528929

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Correct and efficient measurements are vital to the understanding of materials properties and applications. This is especially so for magnetic materials for which in last twenty years, our understanding and use have changed dramatically. New or improved materials have been created and have reached the market. The Soft amorphous alloys, the Fe-based rare-earth magnets and the giant magnetorestrictive and magnetoresistive materials have all posed challenges to measurement. At the same time new digital measurement techniques have forced a change in laboratory and commercial measuring setups. A revision of measuring standards also occurred in the 1990s with the result that there is now a lack of up-to-date works on the measurement of magnetic materials. The basic objective of this work is to provide a comprehensive overview of the properties of the hard and soft magnetic materials relevant to applications and of thoroughly discussing the modern methodologies for employed in the measurement of these properties. The balance of these topics results in a complete text on the topic, which will be invaluable to researchers, students and practitioners in industry. It will be of significant interest not only to scientists working in the fields of power engineering and materials science but also to specialists in measurement who be able to easily find all the information they need. Comprehensive overview of the properties of the hard and soft magnetic materials Provides applications and discusses thoroughly the modern methodologies for employed in the measurement of these properties Provides the latest up-to-date works on the measurement of magnetic materials


Handbook of Advanced Magnetic Materials

Handbook of Advanced Magnetic Materials

Author: Yi Liu

Publisher: Springer Science & Business Media

Published: 2008-11-23

Total Pages: 1844

ISBN-13: 1402079842

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In December 2002, the world's first commercial magnetic levitation super-train went into operation in Shanghai. The train is held just above the rails by magnetic levitation (maglev) and can travel at a speed of 400 km/hr, completing the 30km journey from the city to the airport in minutes. Now consumers are enjoying 50 GB hard drives compared to 0.5 GB hard drives ten years ago. Achievements in magnetic materials research have made dreams of a few decades ago reality. The objective of the four volume reference, Handbook of Advanced Magnetic Materials, is to provide a comprehensive review of recent progress in magnetic materials research. Each chapter will have an introduction to give a clear definition of basic and important concepts of the topic. The details of the topic are then elucidated theoretically and experimentally. New ideas for further advancement are then discussed. Sufficient references are also included for those who wish to read the original work. In the last decade, one of the most significant thrust areas of materials research has been nanostructured magnetic materials. There are several critical sizes that control the behavior of a magnetic material, and size effects become especially critical when dimensions approach a few nanometers, where quantum phenomena appear. The first volume of the book, Nanostructured Advanced Magnetic Materials, has therefore been devoted to the recent development of nanostructured magnetic materials, emphasizing size effects. Our understanding of magnetism has advanced with the establishment of the theory of atomic magnetic moments and itinerant magnetism. Simulation is a powerful tool for exploration and explanation of properties of various magnetic materials. Simulation also provides insight for further development of new materials. Naturally, before any simulation can be started, a model must be constructed. This requires that the material be well characterized. Therefore the second volume, Characterization and Simulation provides a comprehensive review of both experimental methods and simulation techniques for the characterization of magnetic materials. After an introduction, each section gives a detailed description of the method and the following sections provide examples and results of the method. Finally further development of the method will be discussed. The success of each type of magnetic material depends on its properties and cost which are directly related to its fabrication process. Processing of a material can be critical for development of artificial materials such as multilayer films, clusters, etc. Moreover, cost-effective processing usually determines whether a material can be commercialized. In recent years processing of materials has continuously evolved from improvement of traditional methods to more sophisticated and novel methods. The objective of the third volume, Processing of Advanced Magnetic Materials, is to provide a comprehensive review of recent developments in processing of advanced magnetic materials. Each chapter will have an introduction and a section to provide a detailed description of the processing method. The following sections give detailed descriptions of the processing, properties and applications of the relevant materials. Finally the potential and limitation of the processing method will be discussed. The properties of a magnetic material can be characterized by intrinsic properties such as anisotropy, saturation magnetization and extrinsic properties such as coercivity. The properties of a magnetic material can be affected by its chemical composition and processing route. With the continuous search for new materials and invention of new processing routes, magnetic properties of materials cover a wide spectrum of soft magnetic materials, hard magnetic materials, recording materials, sensor materials and others. The objective of the fourth volume, Properties and Applications of Advanced Magnetic Materials, is to provide a comprehensive review of recent development of various magnetic materials and their applications. Each chapter will have an introduction of the materials and the principles of their applications. The following sections give a detailed description of the processing, properties and applications. Finally the potential and limitation of the materials will be discussed.