Ferromagnetic materials

The role of complex surface defect on the magnet at the (110) surface of bismuth sodium titanate (Bi0.5Na0.5TiO3) was discussed based on the first-principles calculation. The first-principle calculations for various types of surface defects exhibited the existence of magnetic moments for selected chemical and position defects.

15p dianmotminh02 03-05-2024 3 2   Download

Ebook "π-Electron magnetism from molecules to magnetic materials" deal with organic molecule-based magnetic materials in which the unpaired spins of the building-block units are located on rc-orbitals conferring special characteristics that differentiate them from materials based on transition metal complexes. The first two chapters discuss the most representative examples of purely organic 3-D magnets as well as the through-space ferromagnetic interactions responsible of the bulk.

218p tracanhphuonghoa1007 22-04-2024 3 2   Download

Ebook "Molecular spintronics: From organic semiconductors to self-assembled monolayers" will focus on the study of organic semiconductors spintronic devices, here Alq3-based spin valves. We will investigate magnetoresistance (MR) effects at room temperature using conventional ferromagnetic (FM) materials. These investigations were done wishing to improve the understanding on the two interfaces and disentangle their contributions on the spin polarization properties of the devices.

191p tracanhphuonghoa1007 22-04-2024 3 2   Download

"Standard Test Methods for Permeability of Weakly Magnetic Materials" cover four procedures for determination of the permeability [relative permeability]2 of materials having a permeability not exceeding 6.0. Materials typically tested by these methods such as austenitic stainless steels may be weakly ferromagnetic. That is, the magnetic permeability is dependent on the magnetic field strength.

8p hth_hn_vn 10-12-2023 6 4   Download

This test method provides a means for determination of the impedance permeability of ferromagnetic materials under the condition of sinusoidal current (sinusoidal H) excitation. Test specimens in the form of laminated toroidal cores, tape-wound toroidal cores, and link-type laminated cores having uniform cross sections and closed flux paths (no air gaps) are used. The method is intended as a means for determining the magnetic performance of ferromagnetic strip having a thickness less than or equal to 0.025 in. [0.635 mm].

4p hth_hn_vn 10-12-2023 13 4   Download

Cobalt ferrite CoFe2O4 (CFO) is a ferromagnetic material with a cubic inverse spinel structure that has the potential to be widely applied in various interdisciplinary fields ranging from information storage, electronic devices, electromagnetic interference suppressors, electromagnetic wave absorbers, sensors, catalytic to the environment, medical.

7p viengels 25-08-2023 9 2   Download

Magnetic vortices have been an interesting element in the past decades due to their flux-closure domain structures which can be stabilized at ground states in soft ferromagnetic microstructures.

8p viberbers 09-08-2023 10 3   Download

The structural, electronic, magnetic and optical properties of suggested XAlO3 (X = Cs, Rb and K) perovskites under pressure effects are investigated by means of the first-principles calculations with the technique of the Full Potential Linearly Augmented Plane Wave (FP-LAPW) implemented within Wien2k computer package.

8p viberbers 09-08-2023 7 3   Download

Magnetic anisotropy plays an important role in determining the magnetic functionality of thin film based electronic devices. We present here, the first systematic study of the correlation between magnetoresistance (MR) response in organic spin valves (OSVs) and magnetic anisotropy of the bottom ferromagnetic electrode over a wide temperature range (10 Ke350 K).

7p viberbers 09-08-2023 3 3   Download

The longitudinal-field muon-spin relaxation (LF-mSR) technique was employed to study the spin correlations in (Mn,Fe)2(P,Si) compounds above the ferromagnetic transition temperature (TC). The (Mn,Fe)2(P,Si) compound under study is found to show itinerant magnetism.

5p viberbers 09-08-2023 9 4   Download

Multiferroic materials refer to a class of materials which possess the intrinsic coupling of two or more ferroic orders (ferroelectric, ferroelastic, and ferromagnetic). Among them, magnetoelectric materials exhibiting both ferroelectric and ferromagnetic characteristics have received much attention due to their great potential in multifunctional applications such as spintronics, memory, and sensors.

10p vidudley 20-02-2023 3 2   Download

In this study, the effects of Fe dopant on the structural, optical, and electrical properties of NiTiO3 materials prepared by sol-gel method were investigated. The prepared powders were investigated through X-ray diffraction, Raman scattering, scanning electron microscope, UV-visible absorption, vibrating sample magnetometer, electrical measurement to explore the structural, ferromagnetic, and electrical properties.

8p viporsche 25-10-2022 6 2   Download

The most distinctive property of ferromagnetism is the observation of hysteresis loops. It is the feature showing the fact that ferromagnetism can remain as a nonzero magnetization after applying an external field and then removing it. This paper aims to introduce one method of using finite element methodology to calculate demagnetization energy, hence to obtain the optimal configuration of magnetic material.

5p vilexus 05-10-2022 16 3   Download

(BQ) Ebook Electromagnetics (2nd edition): Part 1 includes the following content: The static electric field: part 1, the static electric field: part 2, the steady electric current, the static magnetic field of ferromagnetic materials, laplace's and poisson's equations and boundary-value problems, time-changing electric and magnetic fields.

367p runordie6 10-08-2022 8 1   Download

In the paper "Magnetic Properties and Impedance Spectroscopic Studies of Multiferroic Bi1-xNdxFeO3 Materials", we report the Nd-doping effect on structural, magnetic, and complex impedance properties of BFO materials. With the presence of Nd, the crystal structure of BFO was changed. Weak ferromagnetism was observed with an enhancement of spontaneous magnetization due to the collapse of the spin cycloid structure.

84p runordie3 27-06-2022 13 2   Download

CuxMg1.xFe2O4 nanoparticles were successfully synthesized by coprecipitation. The samples were calcined at 900 oC for 3 h and X-ray diffraction analysis showed that Cu0.5Mg0.5Fe2O4 had a single phase cubic spinel structure, while formation of secondary phase of Fe2O3 was observed in XRD patterns of CuFe2O4, MgFe2O4. The saturation magnetization (Ms) of Cu0.5Mg0.5Fe2O4 is in between the saturation magnetization values of CuFe2O4 and MgFe2O4 nanoparticles, CuFe2O4 is a ferromagnetic material, while MgFe2O4 and Cu0.5Mg0.5Fe2O4 show superparamagnetic behavior.

9p nguaconbaynhay12 13-06-2021 24 1   Download

Research objectives of the thesis: Clarification influence of the elements Na, Sr and Ba substituting for La/Ca and crystal size on the magnetic properties, phase transition and magnetocaloric effects of La0,7Ca0,3MnO3 materials. Found the materials for significant mmagnetocaloric parameters have potential for applications in magnetic refrigeration.Determine the effect of replacing Sr/Ba for Ca in La0,7Ca0,3MnO3 and Co substituting for Mn in La0,7Sr0,3MnO3 on their critical behavior as well as the ferromagnetic interactions order.

31p extraenglish 24-05-2021 19 4   Download

The critical properties of the paramagnetic-ferromagnetic (PM-FM) phase transitions in manganites pose an important fundamental problem. On the other hand, the vast variability of competing mechanisms, which may influence the magnetic ordering, may also yield other types of paramagnetic-ferromagnetic transitions for different systems in this class of materials.

11p trinhthamhodang1218 18-03-2021 7 1   Download

This paper presents the study results on the fabrication of a structural integrity assessment apparatus by determining stress concentration zones in pressure pipeline and equipment. The apparatus uses a triaxial magnetic field sensor to measure magnetic field components in three axes Ox, Oy, and Oz, in the working range of the magnetic field from -300 µT to 300 µT.

7p kequaidan9 22-12-2020 12 1   Download

In the present work, Co impurities were introduced to host NBTO materials through the sol-gel method. Results demonstrated the reduction in the optical band gap of pure and Co-doped NBTO, and that the observed room temperature ferromagnetism in Co-doped NBTO materials originates as an intrinsic phenomenon.

7p tamynhan4 06-09-2020 10 1   Download