Magnetic-field sensors based on iron garnets with in-plane magnetization

Holthaus, C.; Nistor, I.; Mayergoyz, I.D.; Krafft, C.

doi:10.1063/1.2169559

Cited by 8 publications

(5 citation statements)

References 9 publications

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“…The root mean square (rms) value of the surface roughness is 1.4 nm which is in agreement with the literature values ranging from 0.2 to 7 nm [10]. Previous studies have showed that the coercive eld is a good indicator of the quality of PLD made YIG lms as a planar waveguide [4,5]. The coercive eld was found to be 5.5 Oe which is small enough for prepared YIG lm to use as a waveguide.…”

Section: Methodssupporting

confidence: 77%

“…In addition, low damping in YIG lms allows spin-wave propagation to be observed over centimeter distances [3]. corresponding author; e-mail: selcuk.atalay@inonu.edu.tr Recently, it has been recognized that YIG lms could be designed as a highly sensitive magnetic eld sensor [4,5]. Conventional magnetic eld sensors have been in use for well hundreds of years.…”

Section: Introductionmentioning

confidence: 99%

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YIG Film for Magnetic Field Sensor

et al. 2015

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Single crystal Y3Fe5O12 (YIG) lm was grown onto (111) oriented gadolinium gallium garnet (GGG) substrate by the liquid phase epitaxy (PLD) technique. The X-ray diraction measurements showed that epitaxial growth of the lm along its (111) axis. The surface characteristic was investigated by atomic force microscopy (AFM) measurement. The magnetic eld sensor consisted of a rectangular shape with 5 mm wide, 15 mm long and 5 µm thick YIG lm and a pair of identical 50 µm wide microstrip copper transducers elements separated by 6 mm. The lter was tested by measuring reection S11 characteristic at various bias magnetic elds. The results have showed that when the bias eld increased from 0 to 2.5 kOe, the frequency value corresponding to S11 maxima increased from 1 GHz to 9 GHz. This suggests that the wide range magnetic eld sensing and the highly sensitive eld sensing are simultaneously fullled with the YIG lm.

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Section: Methodssupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

YIG Film for Magnetic Field Sensor

et al. 2015

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“…These films are used in an out-of-plane magnetization configuration as, for example, in [7] or in an in-plane magnetization [4].…”

Section: ) Fiber Optic Coilmentioning

confidence: 99%

“…Several concepts for such sensors based on fiber optic coils [2], bulk rare-earth iron garnets (RIGs) [3], and RIG films [4] have been presented in the past. This paper presents a high-precise optical current sensor based on the Faraday effect ( Fig.…”

Section: Introductionmentioning

confidence: 99%

High-Dynamic and High-Precise Optical Current Measurement System Based on the Faraday Effect

Gerber

Biela

2015

IEEE Trans. Plasma Sci.

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In this paper, a high-dynamic and high-precise optical current measurement system based on the Faraday effect is presented. First, the sensor concept is presented and different sensor constructions are analyzed. Then, a measurement system based on a rare-earth iron garnet film is investigated. The measurement system uses multiple signal processing channels to increase the signal-to-noise ratio. Furthermore, the measurement range exceeds a rotation of 180°and therefore requires a counting mechanism to count the number of rotations. Finally, the precision of the presented system is analyzed. The precision is determined to be 4.9 ppm at a rotation range of 3300°.Index Terms-Current measurement, Faraday effect, fiber optic sensor.

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“…Consequently, magnetic sensors employing spin-wave interferometry in ferrimagnetic films [34,35] or ferrimagnetic resonance (FMR) in spheres [36][37][38] or films [39][40][41][42] have been investigated, including demonstrations with pT/ √ Hz-level sensitivity. Using ferrimagnetic materials, classical sensors such as fluxgates [43][44][45] and Faradayrotation-based devices [46,47] have achieved sensitivities down to 40 fT/ √ Hz and 10 pT/ √ Hz, respectively. Additionally, ferrimagnetic materials have long found commercial use in tunable microwave filters [48,49] and oscillators [50][51][52].…”

Section: Introductionmentioning

confidence: 99%