Abstract
Magnetoresistive (MR) sensors are widely used, particularly in consumer products. However, in applications requiring extremely sensitive magnetic sensors, superconducting quantum interference devices (SQUIDs) are primarily used. In this study, we develop a hybrid magnetic sensor by combining an MR sensor with two high-temperature superconducting (HTS) plates to achieve sensitivity that lies between those of MR sensors and SQUIDs. In addition, we apply a modulation method for measuring the absolute magnetic field. A nanogranular in-gap tunnel MR sensor is installed inside the slit between the magnetic-field-focusing HTS plates, and the magnetic response is evaluated. Using the magnetic-field-focusing characteristics of the HTS plates (made from <formula><tex>$\rm YBa2Cu3O_{7-\delta}$</tex></formula>) and the MR sensor inside the slit between the two plates, the sensitivity and noise characteristics are improved. Adjustment of parameters such as MR sensor height from the slit, slit width of the HTS plates, and plate size allow sensitivity control depending on the application. Moreover, the absolute magnetic response and low noise in low-frequency regions are obtained through AC modulation.
| Original language | English |
|---|---|
| Journal | IEEE Transactions on Applied Superconductivity |
| DOIs | |
| Publication status | Accepted/In press - Jan 1 2018 |
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Keywords
- absolute magnetic measurement
- High-temperature superconductors
- magnetic field focusing
- Magnetic field measurement
- Magnetic fields
- Magnetic flux
- magnetic sensor
- Sensitivity
- Superconducting magnets
- tunnel magnetoresitance
- Tunneling magnetoresistance
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
Hybrid Magnetic Sensor Combined with a Tunnel Magnetoresistive Sensor and High-Temperature Superconducting Magnetic-Field-Focusing Plates. / Tsukada, Keiji; Hirata, Tetsuro; Goda, Yuto; Sakai, Kenji; Kiwa, Toshihiko.
In: IEEE Transactions on Applied Superconductivity, 01.01.2018.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Hybrid Magnetic Sensor Combined with a Tunnel Magnetoresistive Sensor and High-Temperature Superconducting Magnetic-Field-Focusing Plates
AU - Tsukada, Keiji
AU - Hirata, Tetsuro
AU - Goda, Yuto
AU - Sakai, Kenji
AU - Kiwa, Toshihiko
PY - 2018/1/1
Y1 - 2018/1/1
N2 - Magnetoresistive (MR) sensors are widely used, particularly in consumer products. However, in applications requiring extremely sensitive magnetic sensors, superconducting quantum interference devices (SQUIDs) are primarily used. In this study, we develop a hybrid magnetic sensor by combining an MR sensor with two high-temperature superconducting (HTS) plates to achieve sensitivity that lies between those of MR sensors and SQUIDs. In addition, we apply a modulation method for measuring the absolute magnetic field. A nanogranular in-gap tunnel MR sensor is installed inside the slit between the magnetic-field-focusing HTS plates, and the magnetic response is evaluated. Using the magnetic-field-focusing characteristics of the HTS plates (made from $\rm YBa2Cu3O_{7-\delta}$) and the MR sensor inside the slit between the two plates, the sensitivity and noise characteristics are improved. Adjustment of parameters such as MR sensor height from the slit, slit width of the HTS plates, and plate size allow sensitivity control depending on the application. Moreover, the absolute magnetic response and low noise in low-frequency regions are obtained through AC modulation.
AB - Magnetoresistive (MR) sensors are widely used, particularly in consumer products. However, in applications requiring extremely sensitive magnetic sensors, superconducting quantum interference devices (SQUIDs) are primarily used. In this study, we develop a hybrid magnetic sensor by combining an MR sensor with two high-temperature superconducting (HTS) plates to achieve sensitivity that lies between those of MR sensors and SQUIDs. In addition, we apply a modulation method for measuring the absolute magnetic field. A nanogranular in-gap tunnel MR sensor is installed inside the slit between the magnetic-field-focusing HTS plates, and the magnetic response is evaluated. Using the magnetic-field-focusing characteristics of the HTS plates (made from $\rm YBa2Cu3O_{7-\delta}$) and the MR sensor inside the slit between the two plates, the sensitivity and noise characteristics are improved. Adjustment of parameters such as MR sensor height from the slit, slit width of the HTS plates, and plate size allow sensitivity control depending on the application. Moreover, the absolute magnetic response and low noise in low-frequency regions are obtained through AC modulation.
KW - absolute magnetic measurement
KW - High-temperature superconductors
KW - magnetic field focusing
KW - Magnetic field measurement
KW - Magnetic fields
KW - Magnetic flux
KW - magnetic sensor
KW - Sensitivity
KW - Superconducting magnets
KW - tunnel magnetoresitance
KW - Tunneling magnetoresistance
UR - http://www.scopus.com/inward/record.url?scp=85054614002&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85054614002&partnerID=8YFLogxK
U2 - 10.1109/TASC.2018.2874354
DO - 10.1109/TASC.2018.2874354
M3 - Article
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
ER -