TY - JOUR
T1 - Properties of magnetometer utilizing high-Tc superconducting coil and inductance modulation scheme
AU - Yamashita, Shigeya
AU - Matsuo, Masaaki
AU - Yoshida, Takashi
AU - Sasayama, Teruyoshi
AU - Enpuku, Keiji
N1 - Funding Information:
This work was partly supported by Japan Society for the Promotion of Science Grant-in-Aid for Scientific Research (S ) JP15H05764 .
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/5/15
Y1 - 2020/5/15
N2 - We studied the properties of a magnetometer using high-Tc superconducting coils and an inductance modulation scheme. First, we obtained analytical expressions for the responsivity and magnetic field noise of the magnetometer that could be used for the design of a magnetometer. Next, a prototype magnetometer was fabricated and its performance was measured in liquid nitrogen. It was observed that the measured results agreed well with the calculated results, which indicated the validity of the present design method. We obtained a magnetic field noise of 0.8 pT/Hz1/2 above 25 Hz when using a pickup coil with 50 turns and an average diameter of 25 mm. At low frequencies, the field noise increased when decreasing the frequency, and reached 9 pT/Hz1/2 at 1 Hz. We also discuss the improvement of the magnetometer performance when the size of the pickup coil is increased.
AB - We studied the properties of a magnetometer using high-Tc superconducting coils and an inductance modulation scheme. First, we obtained analytical expressions for the responsivity and magnetic field noise of the magnetometer that could be used for the design of a magnetometer. Next, a prototype magnetometer was fabricated and its performance was measured in liquid nitrogen. It was observed that the measured results agreed well with the calculated results, which indicated the validity of the present design method. We obtained a magnetic field noise of 0.8 pT/Hz1/2 above 25 Hz when using a pickup coil with 50 turns and an average diameter of 25 mm. At low frequencies, the field noise increased when decreasing the frequency, and reached 9 pT/Hz1/2 at 1 Hz. We also discuss the improvement of the magnetometer performance when the size of the pickup coil is increased.
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U2 - 10.1016/j.jmmm.2020.166525
DO - 10.1016/j.jmmm.2020.166525
M3 - Article
AN - SCOPUS:85078667216
SN - 0304-8853
VL - 502
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
M1 - 166525
ER -