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Condensed Matter Journal Club: Scanning SQUID Microscopy and its Applications in Studies of Superconductivity

Event Type
Seminar/Symposium
Sponsor
Condensed Matter Journal Club
Location
276 Loomis
Date
Nov 9, 2021   2:00 - 3:00 pm  
Speaker
Gilbert Arias
Contact
Caitlin Kengle
E-Mail
ckengle2@illinois.edu
Views
4
Originating Calendar
Physics - Condensed Matter Journal Club

A Superconducting Quantum Interference Device (SQUID) is a sensitive magnetometer capable of measuring magnetic flux at fractions of a flux quantum. By coupling a SQUID to a scanning probe, one may image mesoscopic magnetic features with spatial resolutions nearing 600 nm in some cases. There are various approaches to create this coupling such making a micro-SQUID on a sharp tip or using a pick-up coil which is inductively coupled to a SQUID - this tool is known as a Scanning SQUID Microscope (SSM). Abrikosov vortices can be imaged fairly easily with a SSM, allowing their locations and dynamics to be tracked - important for novel superconducting systems as well as conventional superconducting technology. Other emergent behavior can be imaged by SSM, such as edge currents or regions of suppressed superconductivity under strain. SSM is a useful tool in the fundamental studies of superconductivity and hopefully this talk demonstrates this.

Note: this event will be hybrid. The live talk occurring in Loomis 276 will be simultaneously broadcast via Zoom. The Zoom link will be sent to the Graduate Student and PDRA mailing lists. If you are not on one of those lists and are interested in attending, please email Cat Kengle at ckengle2@illinois.edu for the link.

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