scholarly journals Multi-Step Magnetization Process of Gd-Co/Co/Cu/Co Thermo-Sensitive Spin Valves

Electronics ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. 351 ◽  
Author(s):  
Andrei Svalov ◽  
Iñaki Orue ◽  
Galina Kurlyandskaya
Keyword(s):  
Hysteresis Loop ◽  
Magnetic Structure ◽  
Functional Properties ◽  
Critical Field ◽  
Spin Valve ◽  
Precise Determination ◽  
Magnetization Process ◽  
Magnetic Type ◽  
Characteristic Values

Magnetic and magnetoresistive properties of the Gd-Co/Co/Cu/Co magnetic type multilayered sensitive spin valve were studied as a function of temperature. It is shown that the appearance of a non-collinear magnetic structure significantly affects the shape of the magnetoresistive hysteresis loop. The characteristic values of the critical field related to the appearance of non-collinear structure depend on the temperature of the spin valve. The obtained results can serve as a basis for the improvements of functional properties and expanding the application areas of magnetic multilayered sensitive elements of the spin valve type; for example, for precise determination of the position of the object.

Precise determination of critical field anisotropy in (TMTSF)2CLO4

1983 ◽  
Vol 31-34 ◽  
pp. 1147-1148
Author(s):  
K. Oshima ◽  
H. Bando ◽  
H. Kobayashi ◽  
G. Saito
Keyword(s):  
Critical Field ◽  
Precise Determination

scholarly journals Determination of a Hysteresis Model Parameters with the Use of Different Evolutionary Methods for an Innovative Hysteresis Model

Mathematics ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 201 ◽  
Author(s):  
Marko Jesenik ◽  
Marjan Mernik ◽  
Mladen Trlep
Keyword(s):  
Mathematical Expression ◽  
Optimization Method ◽  
Precise Determination ◽  
Model Material ◽  
Model Parameters ◽  
Magnetization Process ◽  
Hysteresis Model ◽  
Bee Colony ◽  
Two Parameters

For precise modeling of electromagnetic devices, we have to model material hysteresis. A Genetic Algorithm, Differential Evolution with three different strategies, teaching–learning-based optimization and Artificial Bee Colony, were used for testing seven different modified mathematical expressions, and the best combination of mathematical expression and solving method was used for hysteresis modeling. The parameters of the hysteresis model were determined based on the measured major hysteresis loop and first-order reversal curves. The model offers a simple determination of the magnetization procedure in the areas between measured curves, with the only correction of two parameters based on only two known points in the magnetization process. It was tested on two very different magnetic materials, and results show good agreement between the measured and calculated curves. The calculated curves between the measured curves have correct shapes. The main difference between our model and other models is that, in our model, each measured curve, major and reversal, is described with different parameters. The magnetization process between measured curves is described according to the nearest measured curve, and this ensures the best fit for each measured curve. In other models, there is mainly only one curve, a major hysteresis or magnetization curve, used for the determination of the parameters, and all other curves are then dependent on this curve. Results confirm that the evolutionary optimization method offers a reliable procedure for precise determination of the parameters.

scholarly journals Термочувствительный спиновый клапан на основе искусственного ферримагнетика: процесс намагничивания в широком диапазоне полей

2019 ◽  
Vol 61 (9) ◽  
pp. 1659
Author(s):  
А.В. Свалов ◽  
Е.А. Степанова ◽  
В.О. Васьковский ◽  
Г.В. Курляндская
Keyword(s):  
Thin Film ◽  
Magnetic Fields ◽  
Hysteresis Loop ◽  
Magnetic Structure ◽  
Critical Field ◽  
Magnetization Reversal ◽  
Spin Valves ◽  
Film System ◽  
Thin Film System ◽  
Wide Range

In this work, Gd-Co/Co/Cu/ Co-type thin film structures with the properties of thermo-sensitive spin valves have been developed, fabricated and investigated. For them, the results of magnetic and magnetoresistive measurements in a wide range of magnetic fields and temperatures are presented. It is shown that the appearance of a non-collinear magnetic structure in the Gd-Co/Co system significantly affects the shape of the magnetoresistive hysteresis loop. The value of the critical field of magnetization reversal depends on the temperature and can vary due to a change in the ratio between the layers thicknesses of the thin film system.

PRECISE DETERMINATION OF THE IRRATIONAL PRE-FERRED INTERFACE ORIENTATION BY TEM

2010 ◽  
Vol 46 (4) ◽  
pp. 411-417 ◽  
Author(s):  
Yang MENG ◽  
Lin GU ◽  
Wenzheng ZHANG
Keyword(s):  
Precise Determination ◽  
Interface Orientation

Nauwkeurige methode voor de aanwasbepaling van het grondvlak met behulp van de Pressler-boor

1968 ◽  
Vol 12 ◽  
Author(s):  
R. Goossens
Keyword(s):  
Basal Area ◽  
Precise Determination ◽  
Maximum Diameter ◽  
Precise Method ◽  
Maximum Radius ◽  
The Core ◽  
Two Parameters

A precise method for the determination of the increment of the  basal area using the PressIer bore. Refering to  previous research showing that the basal area of the corsica pine could be  characterized by an ellips, we present in this paper a precise method for the  determination of the increment of the basal area. In this method we determine  the direction of the maximum diameter, we measure this diameter and we take a  core in one of the points of tangency of the caliper with the measured tree.  The determination of the diameter perpendicular to the maximum diameter  finishes the work wich is to be done in the forest. From the classical  measurements effectuated on the core and from the measured diameters we can  then determine the form (V) and the excentricity (e). Substituting these two  parameters in the formula 2 or 2', we can also calculate the error of a  radius measured on the core with respect to the representative radius, This  error with them allow us to correct the measured value of the minimum or the  maximum radius and we will be able to do a precise determination of the  increment.

scholarly journals A single-step purification method for the precise determination of the antimony isotopic composition of environmental, geological and biological samples by HG-MC-ICP-MS

2021 ◽  
Author(s):  
Ferrari Colin ◽  
Resongles Eléonore ◽  
Freydier Rémi ◽  
Casiot Corinne
Keyword(s):  
Isotopic Composition ◽  
Biological Samples ◽  
Precise Determination ◽  
Single Step ◽  
Functionalized Silica ◽  
Purification Method ◽  
Silica Powder ◽  
Icp Ms ◽  
Single Step Purification

Thiol-functionalized silica powder allowed single-step purification of antimony for exploring stable Sb isotope signatures in the environment.

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