scholarly journals Magnetic and Structure Properties of CoPt-In₂O₃ Nanocomposite Films

2020 ◽  
pp. 431-438
Author(s):  
Liudmila E. Bykova ◽  
Victor G. Myagkov ◽  
Victor S. Zhigalov ◽  
Alexei A. Matsynin ◽  
Dmitry A. Velikanov ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Phase Composition ◽  
Room Temperature ◽  
Vacuum Annealing ◽  
Nanocomposite Films ◽  
Film System ◽  
Temperature Range ◽  
Structural And Magnetic Properties ◽  
Average Size ◽  
Structure Properties

The structural and magnetic properties of CoPt-In₂O₃ nanocomposite films formed by vacuum annealing of the In/(Co3O4 + Pt)/MgO film system in the temperature range of 100–800 ◦C have been investigated. The synthesized nanocomposite films contain ferromagnetic CoPt grains with an average size of 5nm enclosed in an In2O3 matrix, and have a magnetization of 600 emu/cm3, and a coercivity of 150 Oe at room temperature. The initiation 200 ◦C and finishing 800 ◦C temperatures of synthesis were determined, as well as the change in the phase composition of the In/(Co3O4 + Pt)/MgO film during vacuum annealing

scholarly journals Нанокомпозитные пленки Co-In-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=-: синтез, структурные и магнитные свойства

2018 ◽  
Vol 60 (10) ◽  
pp. 2028 ◽  
Author(s):  
Л.Е. Быкова ◽  
В.С. Жигалов ◽  
В.Г. Мягков ◽  
М.Н. Волочаев ◽  
А.А. Мацынин ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Vacuum Annealing ◽  
Nanocomposite Films ◽  
Thermally Activated ◽  
Structural And Magnetic Properties ◽  
Cobalt Nanoclusters ◽  
Average Size ◽  
Ferromagnetic Cobalt

AbstractThe structural and magnetic properties of granular Co–In_2O_3 nanocomposite films formed by vacuum annealing of In/Co_3O_4 film bilayers at a temperature of 550°C have been investigated. The synthesized Co–In_2O_3 films contain ferromagnetic cobalt nanoclusters with an average size of 60 nm and a magnetization of ~340 emu/cm^3 surrounded by the In_2O_3 layer and exhibit the thermally activated conductivity.

ANNEALING EFFECT ON THE INDUCED MAGNETISM OF PLATINUM IN FePt NANOPARTICLES

2007 ◽  
Vol 21 (18) ◽  
pp. 1189-1196 ◽  
Author(s):  
F. WILHELM ◽  
A. ROGALEV ◽  
P. POULOPOULOS ◽  
M. ANGELAKERIS ◽  
J. TSIAOUSSIS ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Circular Dichroism ◽  
Annealing Effect ◽  
Fept Nanoparticles ◽  
X Ray ◽  
Remanence Ratio ◽  
Structural And Magnetic Properties ◽  
Coercivity Field ◽  
Average Size ◽  
Magnetic Circular Dichroism Spectra

Effect of annealing on structural and magnetic properties of non-equatomic chemically synthesized FePt nanoparticles with an average size of 3.2 nm diameter is reported. Annealing of the particles at 700°C resulted in the increase of particles size and the enhancement of total magnetization and coercivity, the latter could be attributed to a transformation from disordered to ordered crystallographic phase. Although the system is far from optimum "equatomic" stoichiometry, coercivity field of 1.1 kOe was obtained at 10 K together with remanence ratio of 0.55. X-ray magnetic circular dichroism spectra recorded at the Pt L 2,3 edges on annealed samples revealed the enhancement of magnetic moment induced on Pt atom.

Structural and magnetic properties of nitrided finemet-type ribbons

2000 ◽  
Vol 77 (9) ◽  
pp. 731-736
Author(s):  
H Atmani ◽  
S Grognet ◽  
J Teillet ◽  
K Zellama ◽  
R Zuberek
Keyword(s):  
Magnetic Properties ◽  
Curie Temperature ◽  
Crystalline Phase ◽  
Room Temperature ◽  
Structural Parameters ◽  
Thermochemical Treatment ◽  
Specific Magnetization ◽  
Nano Structure ◽  
Magnetostriction Constant ◽  
Structural And Magnetic Properties

Nitriding thermochemical treatment under suitable parameters is used to nano-crystallize Fe73.5Cu1Nb3Si13.5B9 ribbon. This new kind of treatment leads to finer nano-structure and modifies the structural parameters of the α-Fe(Si) phase, obtained during the treatment. The magnetic properties are also improved; specific magnetization at room temperature and Curie temperature of the crystalline phase increase, and the magnetostriction constant becomes smaller. The nitrogenation seems to offer a new way to obtain nanostructured ribbons. PACS No.: 75.70

scholarly journals Magnetic Properties of FePt Nanoparticles Prepared by Sonoelectrodeposition

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
Nguyen Hoang Nam ◽  
Nguyen Thi Thanh Van ◽  
Nguyen Dang Phu ◽  
Tran Thi Hong ◽  
Nguyen Hoang Hai ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Saturation Magnetization ◽  
Metallic Nanoparticles ◽  
Room Temperature ◽  
Cathode Surface ◽  
High Coercivity ◽  
Fept Nanoparticles ◽  
Promising Technique ◽  
Structural And Magnetic Properties

Sonoelectrodeposition is a useful technique to make metallic nanoparticles, using ultrasound during electrodeposition to remove nanoparticles as they grow on the cathode surface. This paper reports some structural and magnetic properties of FePt nanoparticles prepared by this method. The as-prepared Fe45Pt55nanoparticles were ferromagnetic at room temperature. Upon annealing at 700°C for 1 h under H2atmosphere, the saturation magnetization and the coercivity of the nanoparticles were improved significantly. The annealed nanoparticles showed a high coercivity of 13.5 kOe at 2 K and of 9 kOe at room temperature. Sonoelectrodeposition is a promising technique to make large quantity of FePt nanoparticles.

Thermite synthesis, structural and magnetic properties of Co-Al2O3 nanocomposite films

2017 ◽  
Vol 724 ◽  
pp. 820-826 ◽  
Author(s):  
V.G. Myagkov ◽  
L.E. Bykova ◽  
V.S. Zhigalov ◽  
A.A. Matsynin ◽  
M.N. Volochaev ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Nanocomposite Films ◽  
Structural And Magnetic Properties

Ferromagnetism in N-Doped In2O3 Films Prepared by Thermal Oxidation

2013 ◽  
Vol 763 ◽  
pp. 102-106
Author(s):  
Peng Fei Xing ◽  
Shao Hua Sun
Keyword(s):  
Magnetic Properties ◽  
Thermal Oxidation ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Ferromagnetic Coupling ◽  
Annealing Conditions ◽  
Different Temperatures ◽  
N Doping ◽  
Structural And Magnetic Properties ◽  
Oxygen Atoms

Two series of N-doped In2O3 films were prepared by annealing the sputtered InN films in air at different temperatures and for different time. The corresponding structural and magnetic properties are studied. An apparent transformation from the wurtzite InN to the cubic bixbyite In2O3 is observed with increasing the annealing temperature. Room temperature d0 ferromagnetism is detected, which is found to be closely related with the annealing conditions. We think that the ferromagnetism is derived from the N-doping which substitute the positions of the oxygen atoms in the In2O3 lattice, and an indirect ferromagnetic coupling can be established between the doped N atoms via the hybridized O 2p and In 5p/4d orbitals.

Structural and Magnetic Properties of Nickel Oxide Nanopowders

2010 ◽  
Vol 168-169 ◽  
pp. 341-344 ◽  
Author(s):  
Nina Mironova-Ulmane ◽  
A. Kuzmin ◽  
J. Grabis ◽  
I. Sildos ◽  
V.I. Voronin ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Magnetic Properties ◽  
Neutron Diffraction ◽  
Nickel Oxide ◽  
Room Temperature ◽  
Squid Magnetometry ◽  
X Ray ◽  
Micro Raman Spectroscopy ◽  
Antiferromagnetic Ordering ◽  
Structural And Magnetic Properties

Structure and magnetic properties of nickel oxide (NiO) nanopowders have been studied by X-ray/neutron diffraction, SQUID magnetometer, and micro-Raman spectroscopy. Our diffraction data indicate that at room temperature all NiO powders are antiferromagnetically ordered and have a rhombohedral (R-3m) phase. The SQUID magnetometry and Raman spectroscopy measurements support the presence of the antiferromagnetic ordering.

Sign in / Sign up

Export Citation Format

Share Document