08/31/2026
AC susceptibility characterization usually means stitching together multiple instruments and fighting a high noise floor.
Lake Shore's Tom Farish will show a simpler path at the 2026 ๐๐ฝ๐ฝ๐น๐ถ๐ฒ๐ฑ ๐ฆ๐๐ฝ๐ฒ๐ฟ๐ฐ๐ผ๐ป๐ฑ๐๐ฐ๐๐ถ๐๐ถ๐๐ ๐๐ผ๐ป๐ณ๐ฒ๐ฟ๐ฒ๐ป๐ฐ๐ฒ (๐๐ฆ๐) ๐ถ๐ป ๐ฃ๐ถ๐๐๐๐ฏ๐๐ฟ๐ด๐ต. His poster, "Broadband AC Susceptibility Measurements of High Temperature Superconductors Using a Synchronous Source Measure Instrument," demonstrates how the M81-SSM works as a single-platform source and detection tool for AC susceptibility measurements. It lowers the noise floor for faint measurements and makes AC susceptibility work easier to set up and run.
Here's what his poster session covers:
๐น Native lock-in measurements from 100 ยตHz to 100 kHz on one integrated platform, with stable readings across temperatures from 1.6 to 300 K and AC field amplitudes from 0.1 A/m to 1600 A/m
๐น Simultaneous data acquisition across multiple channels, so you capture source and detection signals together
๐น Low frequency performance down to 1.5 Hz that resolves slow vortex dynamics, flux creep, and thermally activated flux flow
๐น Simultaneous fundamental and third harmonic acquisition that reveals nonlinear vortex behavior and irreversible flux motion in a single automated run
๐น Results demonstrated on Ag-sheathed BSCCO near Tc and on high-purity indium through the Differential Paramagnetic Effect
If you study vortex dynamics, AC losses, or the electromagnetic response of high-temperature superconductors, come talk with Tom, Wednesday, September 9, 2:30-4:15 p.m.
๐๏ธ Add to calendar: https://eppro01.ativ.me/web/page.php?page=IntHtml&project=ASC2026&id=4515211
