Insights into the Structural and Microscopic Origin of Magnetic Properties of the γ-Fe2O3@MnxOy Nanostructure

2021 ◽  
Author(s):  
Rashmi Joshi ◽  
Bheeshma Pratap Singh ◽  
C. L. Prajapat ◽  
Yogesh Kashyap ◽  
Chandrani Nayak ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Microscopic Origin

Electronic and magnetic properties of monolayer MnS2

2016 ◽  
Vol 30 (36) ◽  
pp. 1650419 ◽  
Author(s):  
Yunliang Yue
Keyword(s):  
Magnetic Properties ◽  
Easy Axis ◽  
Metallic State ◽  
Spin Orbit Coupling ◽  
Formula Unit ◽  
Magnetic Anisotropy Energy ◽  
Half Metallic ◽  
Electronic And Magnetic Properties ◽  
Ising Magnets ◽  
Microscopic Origin

First-principles calculations are performed to study the electronic and magnetic properties of monolayer MnS2. Based on the electronic structure, a half-metallic state is predicted for monolayer MnS2. The magnetic moment is 3.0 [Formula: see text] per formula unit, and the main contribution is localized at the transition metal site Mn with a local moment of 3.733 [Formula: see text]. The magnetic anisotropy energy (MAE) is 0.056 meV per formula unit with an easy axis perpendicular to the plane, and it indicates that monolayer MnS2 belongs to the category of Ising magnets. The positive MAE of nanosheets mainly stems from the area around [Formula: see text] in the reciprocal space. To find the microscopic origin, we take the method of the second-order spin orbit coupling. The occupied spin-up dz2 state and the unoccupied spin-down dyz states in the [Formula: see text] point through the [Formula: see text] operator make positive contributions to the MAE.

Microscopic origin of the macroscopic magnetic properties of TbFeCoN amorphous thin films

1997 ◽  
Vol 56 (13) ◽  
pp. 8149-8155 ◽  
Author(s):  
C. Bordel ◽  
S. Pizzini ◽  
J. Vogel ◽  
K. Mackay ◽  
J. Voiron ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Amorphous Thin Films ◽  
Microscopic Origin

Magnetic and magneto-optical properties of ultrathin films of iron epitaxied on iridium (001)

2008 ◽  
Vol 86 (12) ◽  
pp. 1421-1426 ◽  
Author(s):  
M Boukelkoul ◽  
M Kharoubi ◽  
A Haroun
Keyword(s):  
Magnetic Properties ◽  
Ultrathin Films ◽  
Kerr Effect ◽  
Interlayer Coupling ◽  
Interlayer Spacing ◽  
Magnetic Film ◽  
The Body ◽  
Optical Kerr Effect ◽  
Magneto Optical Kerr Effect ◽  
Microscopic Origin

We have theoretically studied the structural, magnetic, and magneto-optical behaviours of Fe ultra-thin films pseudomorphically epitaxied on semi-infinite Ir(001). The magnetic film crystallizes in the body-centered tetragonal (bct) structure with a tetragonality ratio 1.21. The new crystalline structure of iron in the magnetic film enhances the magnetic properties and a correlation between the interlayer spacing and the magnetic moment is found. The calculation of the magnetic properties shows a ferromagnetic interlayer coupling. The polar magneto-optical Kerr effect (P-MOKE) spectra are calculated over a photon energy range extended to 10~eV. The microscopic origin of the most interesting features is explained from interband transitions in various regions of the Brillouin zone.PACS Nos.: 78.20.Bh, 78.20.Ls

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.

Microstructure in soft magnetic E3 (S1, Al) (Sendust) alloys

1988 ◽  
Vol 46 ◽  
pp. 770-771
Author(s):  
June D. Kim
Keyword(s):  
Electron Microscopy ◽  
Magnetic Properties ◽  
Ternary Phase Diagram ◽  
Vertical Tube ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Soft Magnetic ◽  
Quenching Temperature ◽  
Thin Foils ◽  
Vertical Tube Furnace

Iron-base alloys containing 8-11 wt.% Si, 4-8 wt.% Al, known as “Sendust” alloys, show excellent soft magnetic properties. These magnetic properties are strongly dependent on heat treatment conditions, especially on the quenching temperature following annealing. But little has been known about the microstructure and the Fe-Si-Al ternary phase diagram has not been established. In the present investigation, transmission electron microscopy (TEM) has been used to study the microstructure in a Sendust alloy as a function of temperature.An Fe-9.34 wt.% Si-5.34 wt.% Al (approximately Fe3Si0.6Al0.4) alloy was prepared by vacuum induction melting, and homogenized at 1,200°C for 5 hrs. Specimens were heat-treated in a vertical tube furnace in air, and the temperature was controlled to an accuracy of ±2°C. Thin foils for TEM observation were prepared by jet polishing using a mixture of perchloric acid 15% and acetic acid 85% at 10V and ∼13°C. Electron microscopy was performed using a Philips EM 301 microscope.

Magnetic properties of new charge-transfer complexes based on manganese porphyrins

1997 ◽  
Vol 90 (3) ◽  
pp. 407-413
Author(s):  
MARC KELEMEN ◽  
CHRISTOPH WACHTER ◽  
HUBERT WINTER ◽  
ELMAR DORMANN ◽  
RUDOLF GOMPPER ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Charge Transfer ◽  
Charge Transfer Complexes ◽  
Manganese Porphyrins

Influence of Ni-substitution on magnetic properties of annealed FeNiNbCuSiB alloys

1998 ◽  
Vol 08 (PR2) ◽  
pp. Pr2-111-Pr2-114 ◽  
Author(s):  
P. Vojtaník ◽  
E. Komová ◽  
R. Varga ◽  
R. Matejko ◽  
R. Grössinger ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Ni Substitution
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