scholarly journals Отрицательное магнитосопротивление в структуре n-InSb/ЖИГ

2021 ◽  
Vol 63 (9) ◽  
pp. 1253
Author(s):  
Ю.В. Никулин ◽  
А.В. Кожевников ◽  
Ю.В. Хивинцев ◽  
М.Е. Селезнев ◽  
Ю.А. Филимонов
Keyword(s):  
Proximity Effect ◽  
Electrical Resistance ◽  
Yttrium Iron Garnet ◽  
Substrate Plane ◽  
Garnet Structure ◽  
Magnetoresistance Effect ◽  
Yttrium Iron ◽  
Conduction Electrons ◽  
Gallium Gadolinium Garnet ◽  
Iron Garnet

It is shown that for the n-InSb/YIG/GGG (YIG - yttrium iron garnet, GGG - gallium-gadolinium garnet) structure in the tangent to the substrate plane geometry of magnetization (H <10 kOe) at a temperature T≈300 K the magnetoresistance of about 1% is negative, while for n-InSb/GGG structure, in the same magnetization geometry, the magnetoresistance is positive (an increase in electrical resistance in a magnetic field). The negative magnetoresistance effect in the InSb/YIG/GGG structure is due to the influence of the YIG magnetization on the conduction electrons of InSb (proximity effect) and the magnitude of the effect is determined by the value of YIG magnetization and parameters of InSb films.

scholarly journals Crystalquasichemical Description the Formation of Defects in nanodispersed Yttrium-Iron Garnet

2016 ◽  
Vol 17 (4) ◽  
pp. 621-624
Author(s):  
V.D. Fedoriv ◽  
L.V. Turovska ◽  
I.P. Yaremiy ◽  
N.V. Stashko
Keyword(s):  
Partial Pressure ◽  
Yttrium Iron Garnet ◽  
Sol Gel ◽  
Oxide System ◽  
Garnet Structure ◽  
Partial Pressure Of Oxygen ◽  
Yttrium Iron ◽  
Structure Defects ◽  
Air Atmosphere ◽  
Iron Garnet

By the sol-gel method of autocombustionan initial oxide system was synthesized for a receipt a nanodispersed Yttrium Iron Garnet. It was set that forming of the monophase system Y3Fe5O12 begins at temperatures above 973 К in static air atmosphere. The crystalquasichemical formulas for Y3Fe5O12 are offered. Dependence of concentration of defects from a degree non-stoichiometry of oxygen is calculated. It was set that the formation of garnet structure needed oxygen atmosphere annealing. Partial pressure of oxygen determines the resulting structure defects.

scholarly journals Growing of Thick Single-Crystalline La-Substituted Yttrium-Iron Garnet Films with Reproducible Parameters

2019 ◽  
Vol 64 (3) ◽  
pp. 245 ◽  
Author(s):  
S. I. Yushchuk ◽  
S. O. Yuryev ◽  
N. T. Pokladok
Keyword(s):  
Yttrium Iron Garnet ◽  
Yttrium Iron ◽  
Constant Growth Rate ◽  
Basic Principles ◽  
Single Crystalline ◽  
Garnet Films ◽  
Gallium Gadolinium Garnet ◽  
Supercooled Melt ◽  
Iron Garnet ◽  
Constant Growth

Basic principles of growing the thick (35–60 мm) single-crystalline La-substituted yttrium-iron garnet (Y3−xLaxFe5O12, La :YIG) films with reproducible parameters have been formulated. La :YIG films are grown on gallium-gadolinium garnet (Gd3Ga5O12) substrates from a supercooled melt-solution (MS) consisting of Y2O3, La2O3, and Fe2O3 oxides and the PbO–B2O3 solvent. In order to minimize the implantation of Pb2+ ions into the films, which degrades the film quality, the epitaxy has to be performed at high temperatures and a low MS supercooling. It is found that, in order to maintain a constant growth rate of La :YIG films with reproducible parameters, a large MS mass (10–16 kg) has to be used, and the MS temperature has to be permanently lowered at a rate of 0.042 K/min.

scholarly journals Enhancement in Curie Temperature of Yttrium Iron Garnet by Doping with Neodymium

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1652 ◽  
Author(s):  
Esperanza Baños-López ◽  
Félix Sánchez-De Jesús ◽  
Claudia Cortés-Escobedo ◽  
Arturo Barba-Pingarrón ◽  
Ana Bolarín-Miró
Keyword(s):  
Curie Temperature ◽  
Yttrium Iron Garnet ◽  
High Energy ◽  
Stoichiometric Ratio ◽  
Garnet Structure ◽  
Yttrium Iron ◽  
Structural Formation ◽  
Oxide Powders ◽  
Diffraction Patterns ◽  
Iron Garnet

The effect of the substitution of Y3+ by Nd3+ on the structural and magnetic properties of neodymium-doped yttrium iron garnet, NdxY3−xFe5O12 with x in the range of 0–2.5, is presented. Oxide powders of Fe2O3, Nd2O3, and Y2O3 were mixed in a stoichiometric ratio and milled for 5 h using high-energy ball milling, before being uniaxially pressed at 900 MPa and annealed at 1373 K for 2 h to obtain NdxY3−xFe5O12 (0 ≤ x ≤ 2.5). It was found that the mechanical milling of oxides followed by annealing promotes the complete structural formation of the garnet structure. Additionally, the X-ray diffraction patterns confirm the complete introduction of Nd3+ into the garnet structure with a neodymium doping concentration (x) of 0–2.0, which causes a consistent increment in the lattice parameters with the Nd3+ content. When x is higher than 2.0, the yttrium orthoferrite is the predominant phase. Besides, the magnetic results reveal an increase in the Curie temperature (583 K) as the amount of Nd3+ increases, while there was enhanced saturation magnetization as well as modified remanence and coercivity with respect to non-doped YIG.

Analysis and lattice imaging of a transitional event on garnets

1978 ◽  
Vol 36 (1) ◽  
pp. 270-271
Author(s):  
J.Y. Laval
Keyword(s):  
Yttrium Iron Garnet ◽  
Reciprocal Lattice ◽  
Transitional Zone ◽  
Lattice Imaging ◽  
Yttrium Iron ◽  
X Ray ◽  
Ionic Process ◽  
The Matrix ◽  
High Resolution Technique ◽  
Iron Garnet

The exsolution of magnetite from a substituted Yttrium Iron Garnet, containing an iron excess may lead to a transitional event. This event is characterized hy the formation of a transitional zone at the center of which the magnetite nucleates (Fig.1). Since there is a contrast between the matrix and these zones and since selected area diffraction does not show any difference between those zones and the matrix in the reciprocal lattice, it is of interest to analyze the structure of the transitional zones.By using simultaneously different techniques in electron microscopy, (oscillating crystal method microdiffraction and X-ray microanalysis)one may resolve the ionic process corresponding to the transitional event and image this event subsequently by high resolution technique.

Antisite Defects in Yttrium Iron Garnet

1997 ◽  
Vol 07 (C1) ◽  
pp. C1-283-C1-286
Author(s):  
P. Novák ◽  
J. Englich ◽  
H. Stepánková ◽  
J. Kohout ◽  
H. Lütgemeier ◽  
...  
Keyword(s):  
Yttrium Iron Garnet ◽  
Yttrium Iron ◽  
Antisite Defects ◽  
Iron Garnet

ANISOTROPY OF RUTHENIUM-SUBSTITUTED YTTRIUM-IRON-GARNET

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-200-C1-201 ◽  
Author(s):  
P. HANSEN ◽  
W. TOLKSDORF
Keyword(s):  
Yttrium Iron Garnet ◽  
Yttrium Iron ◽  
Iron Garnet
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