Education & Certifications
M.S., Stanford University, Physics (2019)
B.A., Clark University, Physics & Mathematics (2016)
- SuperScreen: An open-source package for simulating the magnetic response of two-dimensional superconducting devices COMPUTER PHYSICS COMMUNICATIONS 2022; 280
- Local imaging of diamagnetism in proximity-coupled niobium nanoisland arrays on gold thin films PHYSICAL REVIEW B 2022; 106 (5)
- Imaging anisotropic vortex dynamics in FeSe PHYSICAL REVIEW B 2019; 100 (2)
Cryogen-free variable temperature scanning SQUID microscope.
The Review of scientific instruments
2019; 90 (6): 063705
Scanning Superconducting QUantum Interference Device (SQUID) microscopy is a powerful tool for imaging local magnetic properties of materials and devices, but it requires a low-vibration cryogenic environment, traditionally achieved by thermal contact with a bath of liquid helium or the mixing chamber of a "wet" dilution refrigerator. We mount a SQUID microscope on the 3 K plate of a Bluefors cryocooler and characterize its vibration spectrum by measuring SQUID noise in a region of sharp flux gradient. By implementing passive vibration isolation, we reduce relative sensor-sample vibrations to 20 nm in-plane and 15 nm out-of-plane. A variable-temperature sample stage that is thermally isolated from the SQUID sensor enables the measurement at sample temperatures from 2.8 K to 110 K. We demonstrate these advances by imaging inhomogeneous diamagnetic susceptibility and vortex pinning in optimally doped yttrium barium copper oxide above 90 K.
View details for DOI 10.1063/1.5085008
View details for PubMedID 31255038