BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Physics - ECPv6.3.4//NONSGML v1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH X-WR-CALNAME:Physics X-ORIGINAL-URL:https://uwm.edu/physics X-WR-CALDESC:Events for Physics REFRESH-INTERVAL;VALUE=DURATION:PT1H X-Robots-Tag:noindex X-PUBLISHED-TTL:PT1H BEGIN:VTIMEZONE TZID:America/Chicago BEGIN:DAYLIGHT TZOFFSETFROM:-0600 TZOFFSETTO:-0500 TZNAME:CDT DTSTART:20210314T080000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0500 TZOFFSETTO:-0600 TZNAME:CST DTSTART:20211107T070000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTART;TZID=America/Chicago:20211029T140000 DTEND;TZID=America/Chicago:20211029T153000 DTSTAMP:20240328T185630 CREATED:20200303T174247Z LAST-MODIFIED:20211015T151452Z UID:4706-1635516000-1635521400@uwm.edu SUMMARY:Physics Colloquium - Mark Williamsen DESCRIPTION:Mark Williamsen\, Quantum Design\, Inc \nApplications of AC Bridges in Cryogenic Measurements \nAC (alternating current) bridges have proven to be useful in making precise measurements at low temperature\, including thermometry as well as length change with respect to either thermal expansion (dilatometry) or applied magnetic field (magnetostriction). Techniques now in use allow one leg of the bridge to be placed at the cryogenic sample site while the other legs remain at room temperature\, with the intervening temperature gradient being imposed along a length of coaxial cable. Using this method\, length change measurements at atomic scale have recently been used to study a hidden order phase in the heavy fermion system URu2Si2. Plans are now underway to apply this sensitive measurement to a variety of single crystal and polycrystalline samples. \nRelevant citing: S. Ran\, G. M. Schmiedeshoff\, N. Pouse\, I. Jeon\, N. P. Butch\, R. B. Adhikari\, C. C. Almasan & M. B. Maple; “Rapid suppression of the energy gap and the possibility of a gapless hidden order state in URu2−xRexSi2\,” Philosophical Magazine\, 99:14\, 1751-1762\, DOI: 10.1080/14786435.2019.1600756 (2019). \nThe event flyer is available here. URL:https://uwm.edu/physics/event/physics-colloquium-mark-williamsen/ LOCATION:KIRC 1150\, 3135 N. Maryland Ave.\, Milwaukee\, WI\, 53211\, United States CATEGORIES:Physics Colloquia GEO:43.0754962;-87.8839451 X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=KIRC 1150 3135 N. Maryland Ave. Milwaukee WI 53211 United States;X-APPLE-RADIUS=500;X-TITLE=3135 N. Maryland Ave.:geo:-87.8839451,43.0754962 END:VEVENT END:VCALENDAR