Poster: Development of an LC self-oscillator for magnetic measurements at cryogenic temperatures

The techniques utilizing the inductor-capacitor (LC) self-oscillators are a versatile experimental tool for probing magnetic properties, and numerous scientific measurements have employed this type of technique. In particular, a cryogenic LC self-oscillator generically offers high sensitivity by eliminating a long coax cable from the LC tank circuit, which drastically reduces the background signal. The self-oscillators such as a tunnel diode oscillator have been successfully employed with the operating frequency range above 1 MHz. However, its applications lack long-wavelength signals which can ideally bridge studies of the frequency dependent properties between DC and AC techniques. In this work, we develop a novel versatile LC self-oscillator that operates at a wide operating frequency range including 1 kHz. The novel technique allows brand new opportunities to investigate the magnetic properties with various timescales in quantum materials such as topological superconductors and topological semimetals.