Presentation Information
[9p-F212-7]Observation of magnetic-field-induced resonance frequency shifts in high-Q superconducting TiN membrane resonators
〇(B)Daichi Sawachika1, Yuma Okabe1, Yuki Matsuyama2, Atsushi Noguchi2,3,4 (1.College of Arts and Sciences, Univ. of Tokyo, 2.Komaba Inst. for Science, Univ. of Tokyo, 3.RIKEN RQC, 4.InaRIS)
Keywords:
mechanical resonator,superconductivity,magnetic-field response
We measured the magnetic-field dependence of the mechanical resonance frequency of a high-Q superconducting TiN membrane resonator. When an in-plane magnetic field was applied, the resonance frequency shifted to higher values, and the shift was approximately proportional to the square of the magnetic field. In contrast, no clear frequency shift was observed for an out-of-plane magnetic field. These results suggest that the TiN membrane was in the superconducting state under the measurement conditions and that coupling to the magnetic field modified the effective mechanical spring constant. In future work, we will investigate the hysteresis of the response during magnetic-field sweeps and the magnetic-field dependence of the quality factor Q, in order to clarify the origin of the frequency shift and identify possible magnetic-field-induced loss mechanisms.