scholarly journals Magnetic properties of synthetic fluorophlogopite mica crystals

2020 ◽  
Vol 1 (5) ◽  
pp. 1464-1471
Author(s):  
Zheng Ma ◽  
Vassil Skumryev ◽  
Martí Gich
Keyword(s):  
Magnetic Properties ◽  
Flexible Substrate ◽  
Magnetic Characterization ◽  
Characterization Of Materials

The contribution of synthetic fluorophlogopite mica needs to be considered in the magnetic characterization of materials grown on this flexible substrate.

AC Magnetic Measurements on Superconductors

2013 ◽  
pp. 208-222
Author(s):  
Philippe Laurent ◽  
Jean-François Fagnard ◽  
Philippe Vanderbemden
Keyword(s):  
Magnetic Properties ◽  
Temperature Distribution ◽  
Magnetic Measurements ◽  
Sampling Rate ◽  
Data Acquisition System ◽  
Magnetic Data ◽  
Magnetic Characterization ◽  
Set Up ◽  
Cryogenic Conditions

This work describes the design and realisation of an apparatus to measure simultaneously the AC magnetic properties and the temperature distribution on the top surface of bulk superconducting samples (up to 32 mm in diameter) in cryogenic conditions (temperature range 78-120 K). First the authors describe the experimental set-up used for simultaneous thermal and magnetic characterization of the sample. Next, the authors describe the practical considerations required for generating the large AC magnetic fields, possibly in the presence of DC fields. Then the authors present the data acquisition system allowing both temperature and magnetic data to be recorded at high a sampling rate.” The performances and limitations of the system are discussed.

AC Magnetic Measurements on Superconductors

2011 ◽  
Vol 1 (3) ◽  
pp. 53-66
Author(s):  
Philippe Laurent ◽  
Jean-François Fagnard ◽  
Philippe Vanderbemden
Keyword(s):  
Magnetic Properties ◽  
Temperature Distribution ◽  
Magnetic Measurements ◽  
Sampling Rate ◽  
Data Acquisition System ◽  
Magnetic Data ◽  
Magnetic Characterization ◽  
Set Up ◽  
Cryogenic Conditions

This work describes the design and realisation of an apparatus to measure simultaneously the AC magnetic properties and the temperature distribution on the top surface of bulk superconducting samples (up to 32 mm in diameter) in cryogenic conditions (temperature range 78-120 K). First the authors describe the experimental set-up used for simultaneous thermal and magnetic characterization of the sample. Next, the authors describe the practical considerations required for generating the large AC magnetic fields, possibly in the presence of DC fields. Then the authors present the data acquisition system allowing both temperature and magnetic data to be recorded at high a sampling rate." The performances and limitations of the system are discussed.

scholarly journals OBTAINING HYSTERESIS LOOPS AT LOW FREQUENCY FOR CHARACTERIZATION OF MATERIALS TO BE USED IN BIOMEDICAL APPLICATIONS

2015 ◽  
Vol 16 (1) ◽  
Author(s):  
Atika Arshad ◽  
Rumana Tasnim ◽  
Sheroz Khan ◽  
A.H.M Zahirul Alam
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Hysteresis Loop ◽  
Magnetic Materials ◽  
Research Work ◽  
Low Frequency ◽  
Hysteresis Loops ◽  
Simple Circuit ◽  
Characterization Of Materials

The promising development of magnetic sensors in biomedical field demands an appropriate level of understanding of the magnetic properties of the materials used in their fabrication. To date only few of the types of magnetic materials are encountered where their magnetic properties, characterization techniques and magnetization behavior are yet to be explored more suitably in the light of their applications. This research work studies the characterization of materials by using a cost effective and simple circuit consisting of inductive transducer and an OP-AMP as a voltage integrator. In this approach the circuit was simulated using PSPICE and experiments have been conducted to achieve the desired results. The simulation and experimental results are obtained for three test materials namely iron, steel and plastic. The novelty lies in applying the simple circuit for material testing and characterization via obtaining simulation results and validating these results through experiment. The magnetic properties in low external magnetic field are studied with materials under test. The magnetization effect of a magneto-inductive sensor is detected in low frequency range for different magnetic core materials. The results have shown magnetization behaviour of magnetic materials due to the variation of permeability and magnetism. The resulted hysteresis loops appeared to have different shapes for different materials. The magnetic hysteresis loop found for iron core demonstrated a bigger coercive force and larger reversals of magnetism than these of steel core, thus obtaining its magnetic saturation at a larger magnetic field strength. The shape of the hysteresis loop itself is found to be varying upon the nature of the material in use. The resulted magnetization behaviors of the materials proved their possible applicability for use in sensing devices. The key concern of this work is found upon selecting the appropriate magnetic materials at the desired frequency of operation for magneto resistive applications, magneto-resistive sensors and for an extensive range of biomedical sensor application. 

Design, synthesis and isolation of a new 1,2,5-selenadiazolidyl and structural and magnetic characterization of its alkali-metal salts

2019 ◽  
Vol 43 (41) ◽  
pp. 16331-16337
Author(s):  
Nikolay A. Semenov ◽  
Ekaterina A. Radiush ◽  
Elena A. Chulanova ◽  
Alexandra M. Z. Slawin ◽  
J. Derek Woollins ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Alkali Metal ◽  
Electron Acceptor ◽  
Radical Anion ◽  
Metal Salts ◽  
Alkali Metal Salts ◽  
Magnetic Characterization ◽  
Design Synthesis

A new electron acceptor is synthesized and reduced into its radical-anion isolated in the form of two salts with different structures and magnetic properties.

Microstructural Magnetic Characterization of Annealed Non-Oriented Electrical Steel

2018 ◽  
Vol 915 ◽  
pp. 190-195
Author(s):  
Evangelos Hristoforou ◽  
Athanasios G. Mamalis
Keyword(s):  
Magnetic Properties ◽  
Magnetic Permeability ◽  
Electrical Steel ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
Magnetic Characterization ◽  
Microstructural Changes ◽  
Wide Range ◽  
Nondestructive Characterization

The present paper investigates the utilization of the magnetic Barkhausen noise and magnetic permeability methods for the nondestructive characterization of annealed non-oriented electrical steel samples which were isothermally annealed in a wide range of temperatures (400°C – 950°C) and subsequently cooled in air. The resulting magnetic properties were compared with the microstructural changes occurring during annealing.

Initial Study of Magnetic Characterization of Barium Hexaferrite with the Addition of Cobalt Oxide Prepared by Powder Metallurgy Process

2021 ◽  
Vol 1028 ◽  
pp. 38-43
Author(s):  
Trie J.S. Wibowo ◽  
Supono A. Dwiwanto ◽  
Tony Kristiantoro ◽  
Togar Saragi ◽  
Risdiana
Keyword(s):  
Magnetic Properties ◽  
Powder Metallurgy ◽  
Cobalt Oxide ◽  
Barium Hexaferrite ◽  
Xrd Analysis ◽  
Initial Study ◽  
Magnetic Characterization ◽  
Powder Metallurgy Process ◽  
Metallurgy Process

Co3O4 powder was added to barium hexaferrite by powder metallurgy process to determine its effect on the magnetic properties. The variation of the addition of Co3O4 are 0.0, 0.5, 1.0, 2.0, 3.0, and 5.0 wt%. Characterization and magnetic testing included density calculation, Permagraph test, and XRD were performed in order to elucidate the effect of Co3O4 addition to its structure and magnetic properties of barium hexaferrite. The magnetic density obtained was in the ranges of 3.2 - 4.35 g/cm3. From the permagraph test, it is found that the value of remanence (Br) was in between 1.18 and 1.5 kG. The value of coercivity (Hc) was in the range of 0.594 - 3.366 kOe, and the maximum product energy (BHmax) was found to be in between 0.07 and 0.48 MGOe. From the XRD analysis, it was found that two types of barium hexaferrite were formed, namely barium hexaferrite type M(BaFe12O19) and X(Ba2Fe30O46). It is concluded that the addition of the Co3O4 compound increased the value of magnetic density and decreased magnetic properties.

Magnetic Correction of Materials with Weak Magnetism Signals

2013 ◽  
Vol 785-786 ◽  
pp. 567-572
Author(s):  
Jian Jun Gu ◽  
Wei Yang ◽  
Yun Kai Qi ◽  
Shu Min Yang
Keyword(s):  
Measurement Error ◽  
Magnetic Moment ◽  
Traditional Method ◽  
Correction Method ◽  
Magnetic Characterization ◽  
Weak Magnetism ◽  
Characterization Of Materials

For studies of the magnetic characterization of materials with weak magnetism signals, an improved magnetic correction method is proposed to subtract the signal arising from the substrate. The magnetic moment error arising from fitting the data and the system measurement error have been calculated. The influence of nonlinear M-H curves for the substrates has been analyzed and compared with the traditional method of subtracting the substrate signal. Standards determining the presence of ferromagnetism in materials with weak magnetism signals are suggested. The improved magnetic correction method provides a criterion for clarifying confusion in the characterization of materials with weak magnetism signals.

Fe3O4 Epitaxial Thin Films and Heterostructures: Magnetotransport and Magnetic Properties

2010 ◽  
Vol 67 ◽  
pp. 82-91 ◽  
Author(s):  
Julia Orna ◽  
Luis Morellón ◽  
Pedro Algarabel ◽  
José M. De Teresa ◽  
Amalio Fernández-Pacheco ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Magnetic Moment ◽  
Epitaxial Films ◽  
Epitaxial Thin Films ◽  
Magnetic Characterization ◽  
Hall Effects ◽  
Wide Range ◽  
Epitaxial Heterostructures

In this article, we review our recent research on Fe3O4 epitaxial thin films and Fe3O4/MgO/Fe epitaxial heterostructures. More specifically, we report on the magnetotransport properties of Fe3O4 epitaxial films in a wide range of film thicknesses and temperatures, focusing on the anomalous, planar and ordinary Hall effects. We also summarize our insight on the origin of the enhanced magnetic moment found in ultra-thin magnetite films (thickness t < 5 nm). Finally, our work on the growth, and structural and magnetic characterization of heteroepitaxial Fe3O4/MgO/Fe trilayers is presented.

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