scholarly journals Prediction of anisotropic properties of grain-oriented steels based on magnetic measurements

2018 ◽  
Vol 69 (6) ◽  
pp. 470-473 ◽  
Author(s):  
Stan Zurek ◽  
Piotr Borowik ◽  
Krzysztof Chwastek
Keyword(s):  
Magnetic Properties ◽  
Field Strength ◽  
Flux Density ◽  
Coercive Field ◽  
Magnetic Measurements ◽  
Arbitrary Angle ◽  
Anisotropic Properties ◽  
Practical Applications

Abstract Magnetic properties of grain-oriented steels are inseparably linked to their anisotropy. A proper characterization of anisotropy is thus crucial for practical applications. In the paper a description based on magnetic measurements carried out for three well-defined cutting angles is presented. It is shown that it is possible to predict magnetic properties of interest (coercive field strength, remanence flux density) for an arbitrary angle using a limited number of measurements.

MAGNETIC AND MAGNETOIMPEDANCE PROPERTIES OF NiFe AND CoNiFe FILMS PRODUCED BY ELECTRODEPOSITION TECHNIQUE

2007 ◽  
Vol 21 (22) ◽  
pp. 3869-3876
Author(s):  
F. E. ATALAY ◽  
H. KAYA ◽  
SELCUK ATALAY
Keyword(s):  
Magnetic Properties ◽  
Field Strength ◽  
Flux Density ◽  
Coercive Field ◽  
Magnetic Films ◽  
Electrodeposition Technique ◽  
Nickel Iron ◽  
Cobalt Nickel ◽  
High Saturation

Recently, many studies have been carried out to develop ternary CoNiFe (cobalt/nickel/iron) and NiFe alloys due to their capacity of providing an extremely high saturation flux density and a low coercive field strength. In this study, the magnetic properties of NiFe and CoNiFe microtubes were investigated. NiFe and CoNiFe magnetic films were prepared by electrodeposition onto copper wires with a diameter of 50 μm. Coercivity of 61 A/m and a maximum MI response of 186% at a frequency of 900 kHz were obtained for NiFe , which was produced in the pH 1.8 solution.

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 Calculations of magnetic field in dynamo sheets taking into account their texture

Open Physics ◽  
2017 ◽  
Vol 15 (1) ◽  
pp. 1034-1038
Author(s):  
Witold Mazgaj ◽  
Zbigniew Szular ◽  
Paweł Szczurek
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Magnetic Measurements ◽  
Iron Particles ◽  
Easy Magnetization ◽  
Anisotropic Properties ◽  
Steel Sheets ◽  
The Given ◽  
Dynamo Steel ◽  
Magnetization Processes

Abstract Magnetic measurements have shown that the most dynamo steel sheets have certain anisotropic properties, which are due to the presence of textures in these sheets. These anisotropic properties have been taken into account usually in a simplified way assuming that iron particles of the dynamo sheets have only one axis of the easy magnetization. In the proposed approach, these particles are treated as grains which have three axes of the easy magnetization, and therefore the magnetization processes can be considered along each of these axes. These processes depend on the actual value and on the direction of the field strength and also on textures occurring in the given dynamo sheet. A method which allows calculations of the field distribution as a function of the assumed changes of external currents is described in this paper.

scholarly journals Magnetic properties and potential barrier between crystallites model of MgGa2-xFexO4 ceramics

Cerâmica ◽  
2016 ◽  
Vol 62 (364) ◽  
pp. 365-369
Author(s):  
V. A. dos S. Ribeiro ◽  
R. M. Rubinger ◽  
A. F. Oliveira ◽  
C. S. P. Mendonça ◽  
M. R. da Silva
Keyword(s):  
Magnetic Properties ◽  
Potential Barrier ◽  
Coercive Field ◽  
Magnetic Measurements ◽  
Iron Concentration ◽  
Debye Length ◽  
Electrical Characterization ◽  
Solid State Method ◽  
High Electrical Resistivity ◽  
Semiconductor Behavior

Abstract The aim of this work was to investigate the magnetic properties and the electrical conductivity temperature dependence associated to the potential barrier between the crystallites model. Gallium and magnesium containing spinel ceramic has low magnetic coercivity and high electrical resistivity. MgGa2-xFexO4 samples (x= 0.01, 0.05, 0.15, 0.25, 0.35) were prepared by solid-state method and sintered at 800 °C for 8 h. X-ray diffraction analysis confirmed the formation of a single phase with compact cubic spinel structure. The magnetic measurements show that the saturation magnetization and remanence of all samples increased with increasing iron concentration. The coercive field decreased up to the concentration x= 0.15, and above x= 0.25 it was observed an increase in the coercive field. Through electrical characterization it was found that the samples presented highly insulating behavior for x= 0.01, and further increase in x above 0.15 gives a semiconductor behavior compatible with the potential barrier between the crystallites model, i.e. fulfills the condition L/2 > LD (crystallite size L in comparison with the Debye length LD), and the conduction is limited by potential barriers between the crystallites.

Characterization of Electron Beam Welded Non-Oriented Electrical Steel with Magnetic Barkhausen Noise

2014 ◽  
Vol 605 ◽  
pp. 39-42 ◽  
Author(s):  
Polykseni Vourna
Keyword(s):  
Mechanical Properties ◽  
Magnetic Properties ◽  
Electron Beam ◽  
Electrical Steel ◽  
Electron Beam Welding ◽  
Magnetic Measurements ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
Electrical Steels

In this paper the influence of Electron Beam Welding (EBW) on the microstructure, mechanical and magnetic properties of Non-Oriented Electrical steels was presented and evaluated. Single pass welds free of defects were produced at welding speeds and pulsed currents following a predesigned protocol. The samples microstructure and the macrohardness tests were concluded with the magnetic measurements (Barkhausen Noise) in order to correlate the structural and mechanical properties with the magnetizing behavior of Non-Oriented Electrical Steel.

Synthesis and Characterization of PEG-Modified ZnGd0.1Fe1.9O4 Ferrite Nanoparticles for Interstitial Hyperthermia to Tumor

2007 ◽  
Vol 334-335 ◽  
pp. 1209-1212
Author(s):  
Ai Hua Yao ◽  
De Ping Wang ◽  
Wen Hai Huang
Keyword(s):  
Magnetic Properties ◽  
Remanent Magnetization ◽  
Magnetic Measurements ◽  
Magnetic Behavior ◽  
Ferrite Nanoparticles ◽  
Slight Reduction ◽  
Interstitial Hyperthermia ◽  
Coprecipitation Process ◽  
Good Biocompatibility

PEG-modified ZnGd0.1Fe1.9O4 ferrite nanoparticles were synthesized by a coprecipitation process combined with a microemulsion technique. The effect of modification on the structure, magnetic properties of ZnGd0.1Fe1.9O4 nanoparticles was also investigated by XRD, FTIR, TEM and VSM. The results showed immobilizing PEG on the surfaces of magnetic nanoparticles effectively improved their dispersibility. Magnetic measurements indicated that the as-prepared PEG-modified nanoparticles exhibited relatively high magnetic properties, although a slight reduction in saturation and remanent magnetization were observed compared with unmodified samples. Therefore, with promising high magnetic behavior and potentially good biocompatibility, PEG-modified ZnGd0.1Fe1.9O4 ferrite nanoparticles would be feasible as thermoseeds for interstitial hyperthermia to tumor.

Magnetic and Piezoelectric Properties of the Fe3+ Doped PLZT Electroceramics

2012 ◽  
Vol 730-732 ◽  
pp. 117-122 ◽  
Author(s):  
Lucjan Kozielski ◽  
M. Płońska
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Field Intensity ◽  
Magnetic Field Intensity ◽  
Piezoelectric Properties ◽  
Magnetic Measurements ◽  
Iron Ions ◽  
Two Samples ◽  
Fe Ions

For the growing interest in developing of more attractive multiferroic and magnetoelectric ceramics an alternative is a double-doped Pb(Zr1-xTix)O3- material with trivalent lanthanum and iron ions. Such material has a structure based on ABO3perovskite and properties depending on the chemical and structural composition. In the present work the results of the preparation and characterization of Fe3+- modified 9/65/35 PLZT ceramics have been reported. Two samples of Pb0,91(La1-zFez)0,09(Zr0,65Ti0,35)0,9775O3ceramics, for different Fe ions concentration (z = 0,0 and 0,5 at.%), were prepared from the MOM derived powders and sintered by the hot uniaxial pressing methods. To analyze the obtained ceramics properties the XRD, SEM and also application oriented dielectric and magnetic measurements were performed. The Fe3+substitution at the La-site of PLZT has shown many interesting and unusual dielectric, piezoelectric and magnetic properties. The obtained material was proposed to implement into Piezoelectric Transformer structure to change gain characteristics proportionally to magnetic field intensity.

scholarly journals Influence of magnetic anisotropy on flux density changes in dynamo steel sheets

2015 ◽  
Vol 64 (1) ◽  
pp. 81-88
Author(s):  
Witold Mazgaj ◽  
Zbigniew Szular ◽  
Adam Warzecha
Keyword(s):  
Magnetic Anisotropy ◽  
Flux Density ◽  
Magnetic Measurements ◽  
Magnetic Flux Density ◽  
Anisotropic Properties ◽  
Steel Sheets ◽  
Rotational Magnetic Field ◽  
Grain Distribution ◽  
The Given ◽  
Dynamo Steel

Abstract Magnetic measurements, carried out by means of the Epstein frame, have shown that most typical dynamo steel sheets have certain anisotropic properties. In numerical analysis, anisotropic properties are taken into account with the use of the special function of the grain distribution in the given dynamo sheet. For engineering purposes, it is desirable to assess the influence of these properties on the changes of the magnetic flux density in typical dynamo steel sheets, especially during the rotational magnetization. For this purpose, measurements of the flux density changes and field strength changes in the circular-shaped samples of two selected typical dynamo sheets were performed. These measurements were carried out for several values of the current flowing in windings which generated the axial or rotational magnetic field in the test dynamo sheet. The influence of the magnetic anisotropy on the magnetization process was briefly discussed for both types of the magnetization processes.

AEM analysis of crystallization in Ti-based amorphous alloys

1983 ◽  
Vol 41 ◽  
pp. 270-271
Author(s):  
A.R. Pelton ◽  
A.F. Marshall ◽  
Y.S. Lee
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Amorphous Materials ◽  
Isothermal Annealing ◽  
Amorphous Matrix ◽  
Nucleation And Growth ◽  
Current Interest ◽  
Amorphous Films ◽  
Electrical And Magnetic Properties

Amorphous materials are of current interest due to their desirable mechanical, electrical and magnetic properties. Furthermore, crystallizing amorphous alloys provides an avenue for discerning sequential and competitive phases thus allowing access to otherwise inaccessible crystalline structures. Previous studies have shown the benefits of using AEM to determine crystal structures and compositions of partially crystallized alloys. The present paper will discuss the AEM characterization of crystallized Cu-Ti and Ni-Ti amorphous films.Cu60Ti40: The amorphous alloy Cu60Ti40, when continuously heated, forms a simple intermediate, macrocrystalline phase which then transforms to the ordered, equilibrium Cu3Ti2 phase. However, contrary to what one would expect from kinetic considerations, isothermal annealing below the isochronal crystallization temperature results in direct nucleation and growth of Cu3Ti2 from the amorphous matrix.

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