Epitaxial yttrium iron garnet film as an active medium of an even-harmonic magnetic field transducer

Vetoshko, P. M.; Valeiko, M. V.; Никитин, П. И.

doi:10.1016/s0924-4247(03)00182-1

Cited by 31 publications

(34 citation statements)

References 4 publications

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“…For thermally generated noise, the dependence b 0 : V F -1 is theoretically substantiated (Koch et al 1999;Vetoshko et al 2003).…”

Section: Noise Level Comparison Of the Magnetic Materialsmentioning

confidence: 88%

“…As may be seen in Fig. 5, the resulting excitation current amplitude i e greatly surpasses the driving current amplitude i g , which is very favorable Theoretical limit for circularly excited yttrium garnet film core (Vetoshko et al 2003) 0.00008 both for deep saturation of the FGM core and for power economy: in a high-class FGM, at peak current in the pulse up to 1 A, the mean consumed current by the excitation circuit in this mode is only about 5 mA! For a lower class FGM, this gain may be still higher.…”

Section: Excitation Mode Selectionmentioning

confidence: 93%

“…For instance, noise *0.4 pT/Hz 0.5 with the help of the circularly excited single-domain yttrium garnet film core with the volume 0.25 mm 3 was measured by Vetoshko et al (2003). They showed that the measured noise level is caused by thermal fluctuations of the sensing coil whereas the thermal noise of the magnetic core has to be *5 fT/Hz 0.5 !.…”

Section: Some Methods Of Magnetic Noise Suppressionmentioning

confidence: 99%

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Flux-Gate Magnetometers Design Peculiarities

Korepanov¹,

Marusenkov²

2012

Surv Geophys

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The most widespread instrument used today for the measurement of quasistationary and slowly fluctuating vector magnetic fields is a flux-gate magnetometer (FGM). The most important parameter characterizing the magnetometer quality is its magnetic noise-its threshold sensitivity or its own noise level (NL). Based on the results of experimental research, we may state that the FGM NL mainly depends on the quality of the magnetic material used for FGM sensor core. The ''solid liquid'' model explaining the nature of magnetic noise is proposed and substantiated. It is demonstrated that special attention has to be paid to the annealing of the core. A new effect-termed gammamagnetic normalization-is discovered and discussed. It is shown that the magnetometer NL depends not only on the core length and volume but also on the excitation mode of the core. Besides, the ways to improve other factors, such as power consumption and thermal drift which must be taken into account in order to create a FGM with the highest possible performance, are discussed. Some examples are given of the parameters of present advanced FGMs for geophysical uses.

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“…For thermally generated noise, the dependence b 0 : V F -1 is theoretically substantiated (Koch et al 1999;Vetoshko et al 2003).…”

Section: Noise Level Comparison Of the Magnetic Materialsmentioning

confidence: 88%

Section: Excitation Mode Selectionmentioning

confidence: 93%

Section: Some Methods Of Magnetic Noise Suppressionmentioning

confidence: 99%

See 1 more Smart Citation

Flux-Gate Magnetometers Design Peculiarities

Korepanov¹,

Marusenkov²

2012

Surv Geophys

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“…To achieve this, the most important thing is to improve the FGM sensor. New approaches such as the use of ferrodielectric materials (Vetoshko et al, 2003) and special excitation modes (Vetoshko et al, 2003;Koch and Rozen, 2001;Ioan et al, 2004;Sasada and Kashima, 2009;Paperno, 2004) can significantly reduce the level of own noise of fluxgate sensor, in particular, down to 0.1 pT Hz −0.5 at a frequency of 1 Hz (Koch and Rozen, 2001) with a further decrease to several tens of fT Hz −0.5 (Koch and Rozen, 2001;Koch et al, 1999). Also in the best examples of fluxgate sensors for space research, along with moderate noise level, zero offset is practically independent of temperature: their zero drift is within 1 nT in the temperature range −40 to +65 • C (Merayo et al, 2005;Nielsen et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Possibilities of further improvement of 1 s fluxgate variometers

Marusenkov¹

2017

Geosci. Instrum. Method. Data Syst.

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Abstract. The paper discusses the possibility of improving temperature and noise characteristics of fluxgate variometers. The new fluxgate sensor with a Co-based amorphous ring core is described. This sensor is capable of improving the signal-to-noise ratio at the recording short-period geomagnetic variations. Besides the sensor performance, it is very important to create the high-stability compensation field that cancels the main Earth magnetic field inside the magnetic cores. For this purpose the new digitally controlled current source with low noise level and high temperature stability is developed.

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“…The epitaxial films based on YIG with low (within a few Oe) inplain saturation magnetic field are promising materials for use as active media for high sensitive fluxgate-like magnetic field sensors [6][7][8]. Such garnet materials, including nanoparticle may be also of interest as promising materials for optoelecronics and quantum electronics [9,10].…”

Section: Introductionmentioning

confidence: 99%