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Ultra-fine iron particles of sizes ranging from 75 to 300 Å were prepared by the gas-evaporation method in an argon atmosphere. ... the mean particle size is determined. Magnetic properties of these particles were obtained by a vibrating sample magnetometer. It is considered that an oxidation layer may be formed on the surface of iron ...
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Magnetic Properties of Materials 1. Magnetisation of materials due to a set of isolated atoms (or ions) a) Diamagnetism - magnetic moment of filled shells of atoms. Induced moment opposes …
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DOI: 10.1016/S0304-8853(98)00171-1 Corpus ID: 122969284; On the magnetic properties of ultra-fine zinc ferrites @article{Anantharaman1998OnTM, title={On the magnetic properties of ultra-fine zinc ferrites}, author={M. R. Anantharaman and S. Jagatheesan and K. A. Malini and S. Sindhu and A. Narayanasamy and C. N. Chinnasamy and J Jean-Paul Jacobs and S. Reijne and …
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First-order reversal curve (FORC) diagrams are constructed from a class of partial magnetic hysteresis loops known as first-order reversal curves …
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The geographic pattern of magnetic properties is most reasonably explained by a major source of sediment jointly from the erosion of the old Huanghe River deposit and the discharge of the Changjiang River. The rock magnetic data facilitate understanding of the transport mechanism of fine-grained sediments in the outer shelf of the East China Sea.
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Paramagnetism. Paramagnetism refers to the magnetic state of an atom with one or more unpaired electrons. The unpaired electrons are attracted by a magnetic field due to the electrons' magnetic dipole moments. Hund's Rule states that electrons must occupy every orbital singly before any orbital is doubly occupied. This may leave the atom with many unpaired electrons.
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Magnetic Properties are a driving force in materials science and mechanical engineering, shaping how we design and power the world. They blend science with practicality, turning raw materials into magnetic marvels. As technology advances—think renewable energy or robotics—these properties will fuel even bolder innovations. Master them now ...
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The next concern is how the magnetic properties evolve by these jet-milling processes. Fig. 2 summarizes the influences of those reduced average diameters on various magnetic properties as well as on FWHM. In this way, the inter-relations between the magnetic properties and the FWHM can be discussed. Download : Download high-res image (401KB)
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Introduction Magnetic properties of ultra-fine iron particles produced by the gas-evaporation method are interesting [1-3]. By properly controlling the pressure of the inert gas and the temperature of the evaporation source, one can obtain various sizes of iron particles. It is known that as the size of particles becomes smaller than a critical ...
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longitudinal magnetic field annealing (FA) and co synergistically affect the microstructure, magnetic domain behavior, and soft magnetic properties of Fe-based …
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By probing internal Rydberg-like transitions of excitons in the magnetic semiconductor CrSBr, we reveal their binding energy and a dramatic anisotropy of their quasi …
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The initial hot rolled microstructure has significant effects on the successive microstructure, texture evolution and the final magnetic properties in low silicon NOES. In the present work, we tried to optimize the hot rolled microstructure of a 0.4 wt% Si steel by fine-tuning Al content so as to improve the magnetic properties.
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Magnetic properties of Ni fine particles, 3 nm in diameter, dispersed in an oil by a surface-active agent were examined by magnetization and Möss measurements. From the magnetization measurements, the particles were found superparamagnetic at temperatures above about 40 K. The saturation magnetization at 4.2 K was reduced to 50% of that ...
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Dorman J L and Fiorani D 1992 Magnetic properties of fine particles (Amsterdam: North . Holland) 4. Chantrell R W and O'Grady K 1994 Applied magnetism (eds) Gerber et al (Dordrecht:
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Fine powders of lanthanum iron oxide, LaFeO3, have been prepared by solid state reaction as well as sol-gel synthesis and nebulized spray pyrolysis. Structures, morphologies and magnetic susceptibility measurements of these powders have been examined. The powders prepared by all the three low-temperature routes contain nearly spherical particles with an average diameter …
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Four samples containing ultrafine- and fine-grained magnetite of magnetoferritins and magnetotactic bacteria cells were magnetically characterized at both room and low temperatures. Transmission electron microscopy …
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Magnetic fine particles find a large number of applications, perhaps most notably as particulate recording media. In addition, the ideas of fine particle magnetism are applicable in a number of areas as diverse as geomagnetism and biomagnetism. The purpose of this chapter is to introduce the fundamental aspects of fine particle magnets, including magnetisation reversal …
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Structure, magnetic properties and electrical resistivity (g9) of Fe M O (M = Hf, Zr, Y, Ce) prepared by r.f. reactive sputtering technique in an Ar + O 2 atmosphere were investigated. In an as-deposited state, the structure of the Fe M O films in the compositional range of 8 < 0 < 35 at.% and 5–7 < NI < 25 at.% is found to be composed of nanoscale grains and amorphous …
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Such samples afford the opportunity to investigate the static and dynamic magnetic properties of well-defined particles in order to correlate both them with the particles size. For a given mmpositioq the saturation magnetization steadily decreases as the pmicles mean radius decreases. Ths variation is explained by a core-shell model [3] which ...
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Extensive study of the magnetic properties of soils and sediments by both earth scientists and biomagnetists has failed to establish the extent to which fine-grained magnetic components in the sediments' are dominated by detrital or by authigenic bacterial contributions. The question is of considerable importance to workers in a wide range of research fields. This …
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The particles prepared in the AOT system were extremely small and superparamagnetic with magnetic moment per particle of 11.5μ B, a blocking temperature of 2 K, and σ s =146 emu/g at 1.7 K. The magnetic moment and σ s combined imply a particle size of about 5.4 Å. However, the particles made in the DDAB system were relatively large, ∼10 nm.
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All aspects of fine magnetic particles are covered in the 46 papers. The topics are remarkably interdisciplinary covering theory, materials preparation, structural characterization, optical and electrical properties, magnetic properties studied by different techniques and applications.
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Fine powders of magnesium ferrite, MgFe{sub 2}O{sub 4}, were produced through the sol-gel supercritical drying method, with two portions then being calcined at 773 K and 1,073 K. The powder structural and magnetic properties were determined from transmission electron microscope micrographs, x-ray diffraction, Moess effect spectroscopy and magnetometry …
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VOL 35, NO 5, SEPTEMBER 1999 3469 Static and dynamic magnetic properties of fine CoNi and FeCoNi particles synthesized by the poly01 process Philippe Toneguzzo and Olivier Acher CEA Le Ripault, BP 16, F-37260 Monts, France. zyxwvutsr zyxwvutsrq zy zyxw Guillaume Viau, Angklique Pierrard, Franqoise Fievet-Vincent and Fernand Fikvet Laboratoire ...
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Magnetic fine particles find a large number of applications, perhaps most notably as particulate recording media. In addition, the ideas of fine particle magnetism are applicable in a number of …
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Magnetic fine particles find a large number of applications, perhaps most notably as particulate recording media. In addition, the ideas of fine particle magnetism are applicable in a number of areas as diverse as geomagnetism and biomagnetism. The purpose of this...
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Magnetic Properties of Nuclei. ... The "fine structure" splittings of the three chemically-shifted components will be explained in the next Section. The chemical shift of a …
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The focus is on investigating the effects of coiling temperature after hot rolling on microstructure, texture evolution, and magnetic properties. A fine microstructure with weak λ-fiber texture ...
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M-type Sr-hexaferrites fine particles have been prepared by mechanical alloying. The influences of milling conditions on magnetic properties of SrFe 12 O 19 compounds have been systematically investigated. It can be found that annealing treatment at low temperature can play similar role in structural transformation as compared with long time milling process.
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The microstructure, magnetic, and mechanical properties of the MCAs obtained by the TMA and TA procedures were then investigated in detail. Ex-situ electron backscatter …
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