Dependence of the noise of an orthogonal fluxgate on the composition of its amorphous wire-core
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F20%3A00341817" target="_blank" >RIV/68407700:21230/20:00341817 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1063/1.5130393" target="_blank" >https://doi.org/10.1063/1.5130393</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.5130393" target="_blank" >10.1063/1.5130393</a>
Alternative languages
Result language
angličtina
Original language name
Dependence of the noise of an orthogonal fluxgate on the composition of its amorphous wire-core
Original language description
In this paper we study the effect of magnetostriction of Co-rich amorphous microwire to the noise of the orthogonal fluxgates based on such wires. The magnetostriction was modified by changing the relative amount of iron x with the respect of the total amount of cobalt and iron in the alloy. Specifically we changed x in the composition (Co1-xFex)75Si15B10 casting wires with the following values of x: 0.05, 0.055, 0.06, 0.062, 0.065, 0.07 and 0.08. We found out that the noise indeed depends on the composition of the wire: while it is minimum (2.5 pT/root Hz) for x between 0.06 and 0.062 where the magnetostriction is vanishing (lambda(s) approximate to 10(-7)) it significantly increases to tens of pT/root Hz for both positive and negative magnetostriction when lambda(s) becomes one order of magnitude bigger. We verified that once the composition returns a magnetostriction low enough (around x = 0.06) then the noise does not depend on mechanical stress anymore. In fact the noise of a sensor with x = 0.06 is the identical in its natural curved state and when bended straight; for vanishing magnetostriction the bending does not affect at all the noise, as on the contrary it happens with larger magnetostriction. This suggests that once the wire has composition with x = 0.06 the remaining noise is not caused by mechanical stress. Finally we show how to overcome the problem of offset arising after annealing if continuous annealing current is used. We explain how this could be due by the fact that magnetostriction changes with temperature and even a wire with vanishing magnetostriction at room temperature can became significantly magnetostrictive at annealing temperature. For this reason we propose a method of annealing consisting rising the temperature of the wire while the wire is kept in its natural curved state.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20201 - Electrical and electronic engineering
Result continuities
Project
<a href="/en/project/EF16_027%2F0008465" target="_blank" >EF16_027/0008465: International Mobility of Researchers in CTU</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
AIP Advances
ISSN
2158-3226
e-ISSN
—
Volume of the periodical
2020
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
6
Pages from-to
"025114-1"-"025114-1"
UT code for WoS article
000514626000008
EID of the result in the Scopus database
2-s2.0-85079606917