Standard samples of the magnetic properties of magnetically-hard ferrites

1980 ◽  
Vol 23 (3) ◽  
pp. 253-255
Author(s):  
M. A. Artemova
Keyword(s):  
Magnetic Properties ◽  
Standard Samples ◽  
Magnetically Hard ◽  
Hard Ferrites

scholarly journals Microstructure and magnetic properties of Nd-Fe-B-(Re, Ti) alloys

Nukleonika ◽  
2015 ◽  
Vol 60 (1) ◽  
pp. 29-33
Author(s):  
Mariusz Hasiak
Keyword(s):  
Magnetic Properties ◽  
Phase Composition ◽  
Volume Fraction ◽  
Magnetic Characteristics ◽  
Ti Alloys ◽  
Wide Range ◽  
Magnetically Hard ◽  
Ti Addition ◽  
Microstructure And Magnetic Properties

Abstract The microstructure and magnetic properties of nanocomposite hard magnetic Nd-Fe-B-(Re, Ti) materials with different Nd and Fe contents are studied. The role of Re and Ti addition in phase composition and volume fraction of the Nd-Fe-B phase is determined. All samples are annealed at the same temperature of 993 K for 10 min. Mössbauer spectroscopy shows that the addition of 4 at.% of Re to the Nd8Fe78B14 alloy leads to creation of an ineligible amount of the magnetically hard Nd2Fe14B phase. Moreover, the microstructure and magnetic characteristics recorded in a wide range of temperatures for the Nd8Fe79−xB13Mx (x = 4; M = Re or Ti) alloys are also analyzed.

Application of Plasma Electrolytic Oxidation for the Formation of Magnetoactive Oxide Layes

2014 ◽  
Vol 875-877 ◽  
pp. 341-345
Author(s):  
V.S. Rudnev ◽  
I.V. Lukiyanchuk ◽  
M.V. Adigamova ◽  
A.Yu. Ustinov ◽  
P.V. Kharitonskii ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Coercive Force ◽  
Plasma Electrolytic Oxidation ◽  
Room Temperature ◽  
Hard Materials ◽  
Oxidized Iron ◽  
Electrolytic Oxidation ◽  
Magnetically Hard Materials ◽  
Magnetically Hard ◽  
Plasma Electrolytic

Using plasma electrolytic oxidation technique we obtained ferromagnetic coatings on titanium and alluminium. The measured coercive force, ~ 100 Oe at room temperature, is closer to the values corresponding to magnetically hard materials. The coatings are of interest as protective electromagnetic screens. The coatings were studied by XRD, XPS, XSA and SEM. There are crystallites of ~50 nm in size containing reduced and oxidized iron in the pores of the coatings. We consider that magnetic properties of the coatings are related with these crystallites.

scholarly journals Influence of a Laser Irradiation and Laser Scribing on Magnetic Properties of GO Silicon Steels Sheets Using a Nanosecond Fiber Laser

2021 ◽  
Vol 23 (6) ◽  
pp. 439-444
Author(s):  
Manar Nesser ◽  
Olivier Maloberti ◽  
Elias Salloum ◽  
Julien Dupuy ◽  
Jérôme Fortin
Keyword(s):  
Magnetic Properties ◽  
Laser Treatment ◽  
Power Loss ◽  
Average Power ◽  
Magnetic Behavior ◽  
Static Field ◽  
Total Power ◽  
Standard Samples ◽  
Apparent Permeability ◽  
The Impact

Improving the performance of electrical steels within the magnetic circuits is essential to save energy. The domain refinement through local surface treatment by laser is an effective technique to reduce the iron losses in grain-oriented iron silicon steels. To interpret the mechanism of this technique, we have quantitatively studied the impact of nanosecond pulse laser treatment on the magnetic properties of grain-oriented Fe(3%wt)Si sheets. We measured the total power loss and apparent permeability of the samples using a Single-Sheet Tester (SST). The laser treatment resulted in a loss reduction of up to 24% compared to the average power loss of standard samples at 50 Hz. At mid-induction levels, the reduction was also accompanied by an improvement in apparent permeability. A dynamic magnetic behavior law was used to identify a dynamic property Λ including information on density, surface area and wall mobility and another internal permeability property µ representative of static field and magnetization characteristics. Lastly, we presented the behavior of these properties under different laser treatment.

Magnetic properties of hybrid elastomers with magnetically hard fillers: rotation of particles

2017 ◽  
Vol 26 (3) ◽  
pp. 035060 ◽  
Author(s):  
G V Stepanov ◽  
D Yu Borin ◽  
A V Bakhtiiarov ◽  
P A Storozhenko
Keyword(s):  
Magnetic Properties ◽  
Magnetically Hard

scholarly journals The effects of the thickness of magnetically hard- and soft-phase layers on magnetic properties and exchange coupling in multilayer magnets

2005 ◽  
Vol 97 (10) ◽  
pp. 10K303 ◽  
Author(s):  
W. Liu ◽  
Y. C. Sui ◽  
J. Zhou ◽  
X. K. Sun ◽  
C. L. Chen ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Exchange Coupling ◽  
Soft Phase ◽  
Phase Layers ◽  
Magnetically Hard

Mechanochemical Synthesis of Nanocrystalline (Fe,Co)3О4-Based Alloys and their Magnetic Properties

2011 ◽  
Vol 170 ◽  
pp. 97-101 ◽  
Author(s):  
Vladimir P. Menushenkov ◽  
Yurii D. Yagodkin ◽  
Ekaterina Shandrovskaiy
Keyword(s):  
Magnetic Properties ◽  
Crystallite Size ◽  
High Energy ◽  
Hard Alloys ◽  
X Ray Diffraction ◽  
Low Temperature Annealing ◽  
Transmission Electron ◽  
Energy Ball ◽  
Magnetically Hard ◽  
Nanocrystalline Composite

The structure of nanocrystalline Fe-Co-O alloys produced by high-energy ball milling and subsequent low-temperature annealing were investigated by X-ray diffraction analysis, scanning and transmission electron microscopy. The magnetic properties were measured in vibrating sample magnetometers at room temperature. The mixtures of FeO and Co powders were used as starting materials. The nanocrystalline composite alloys, obtained as a result of the milling, contained FeO and -Fe with the crystallite size of 12-18 nm as well as an amorphous phase. However, alloys subjected to subsequent annealing contained Fe3O4 and -Fe phases with crystallite size of 10-30 nm, in which Co is dissolved. Unlike the starting materials the produced powders exhibit properties typical of magnetically hard alloys. The intrinsic coercive force of the annealed powders increases with increasing (Fe,Co)3O4 phase content and reaches approximately 800 Oe.

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