A thin film HTSC-Hall magnetometer––development and application

Linzen, S.; Schmidt, Florian; Schmidl, F.; Mans, Michael; Hesse, O.; Nitsche, Fabian; Kaiser, G.; Müller, Stephan; Seidel, P.

doi:10.1016/s0921-4534(02)00640-8

Cited by 10 publications

(5 citation statements)

References 4 publications

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“…In accordance to the discussion of Figure 4, the dynamic range derived solely from crystalline anisotropy might/will not resemble the properties of real sensors as it is affected by contributions of other anisotropies. However, such an antiproportional coupling can also be observed for Hall effect sensors [49] using a modified bias current; the similarity found here is presumably by accident. On the basis of the presented results a stepwise integration of experimental conditions can be realized in further studies, for example in terms of polycrystallinity, stresses or design related changes.…”

Section: Eigenfrequency Behavior In the Magnetic Fieldsupporting

confidence: 76%

Anisotropy of the ΔE Effect in Ni-Based Magnetoelectric Cantilevers: A Finite Element Method Analysis

Hähnlein

Sagar

Krischok

et al. 2022

Sensors

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In recent investigations of magnetoelectric sensors based on microelectromechanical cantilevers made of TiN/AlN/Ni, a complex eigenfrequency behavior arising from the anisotropic ΔE effect was demonstrated. Within this work, a FEM simulation model based on this material system is presented to allow an investigation of the vibrational properties of cantilever-based sensors derived from magnetocrystalline anisotropy while avoiding other anisotropic contributions. Using the magnetocrystalline ΔE effect, a magnetic hardening of Nickel is demonstrated for the (110) as well as the (111) orientation. The sensitivity is extracted from the field-dependent eigenfrequency curves. It is found, that the transitions of the individual magnetic domain states in the magnetization process are the dominant influencing factor on the sensitivity for all crystal orientations. It is shown, that Nickel layers in the sensor aligned along the medium or hard axis yield a higher sensitivity than layers along the easy axis. The peak sensitivity was determined to 41.3 T−1 for (110) in-plane-oriented Nickel at a magnetic bias flux of 1.78 mT. The results achieved by FEM simulations are compared to the results calculated by the Euler–Bernoulli theory.

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Section: Eigenfrequency Behavior In the Magnetic Fieldsupporting

confidence: 76%

Anisotropy of the ΔE Effect in Ni-Based Magnetoelectric Cantilevers: A Finite Element Method Analysis

Hähnlein

Sagar

Krischok

et al. 2022

Sensors

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“…In 2004, Pannetier et al [5] proposed giant magnetoresistance-based mixed sensors with a superconducting loop working as the magnetic flux concentrator. A Hall sensor [6] and a sensor based on the magnetoresistance effect in ceramic high-temperature superconducting (HTS) material [7] are also used in this kind of mixed sensor. This concentrator transforms the flux being measured to a local enhanced field.…”

Section: Introductionmentioning

confidence: 99%

Research on a Superconducting Magnetic Flux Concentrator for a GMI-Based Mixed Sensor

Wang

Zhang

2014

IEEE Trans. Appl. Supercond.

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A magnetic concentrator (MC) is often used to increase the performance of traditional magnetic sensors. A superconducting MC has been proven to be high powered when integrated with a field sensor. Such concentrators are often designed as a square loop shape with a narrow constriction. When an external field is applied, a superconducting current will be induced that flows in the loop. The self-field in the local area of the narrow constriction is much higher than the applied field, which can be detected by a field sensor. In this paper, a superconducting MC is described, and the amplified magnetic flux density is calculated. Magnetooptical experiments are performed on three samples to better understand the phenomenon. The magnetic properties of the concentrator are investigated in the field of 0.1-300 Oe. The maximum magnetic gain of our three samples is 55 as given by the magnetooptical measurements. Considering the great progress made in giant magnetoimpedance (GMI) film materials, a GMI-based mixed sensor with a well-designed superconducting MC is very promising for achieving a high resolution for low-field detection.Index Terms-Magnetic concentrator (MC), magnetooptical imaging, mixed sensor, superconducting.

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“…Due to the local high current density the magnetic field in the vicinity of the constriction is also increased and that is where a sensor can be placed. Dependent on the sensitive direction of the sensor (in plane or perpendicular) the sensor can be placed on top of, or next to the constriction [46][47][48][49][50]. Note that both possible sensor positions are displayed in figure 1.3b).…”

Section: Flux Concentrationmentioning

confidence: 99%

“…The sensitivity of the device can effectively be enhanced by applying flux concentration, which means that the flux of a certain area is collected and focused on the sensor. Typical fields of application can then be for example non-destructive evaluation (NDE) [47], biomagnetism [86] or space.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid magnetometers for unshielded operation : combining hall sensors with superconducting flux concentrators

Kuit¹

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A thin film HTSC-Hall magnetometer––development and application

Cited by 10 publications

References 4 publications

Anisotropy of the ΔE Effect in Ni-Based Magnetoelectric Cantilevers: A Finite Element Method Analysis

Anisotropy of the ΔE Effect in Ni-Based Magnetoelectric Cantilevers: A Finite Element Method Analysis

Research on a Superconducting Magnetic Flux Concentrator for a GMI-Based Mixed Sensor

Hybrid magnetometers for unshielded operation : combining hall sensors with superconducting flux concentrators

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