BEGIN:VCALENDAR VERSION:2.0 METHOD:PUBLISH PRODID:-//Missouri State University/Calendar of Events//EN CALSCALE:GREGORIAN X-WR-TIMEZONE:America/Chicago BEGIN:VTIMEZONE TZID:America/Chicago BEGIN:DAYLIGHT TZOFFSETFROM:-0600 TZOFFSETTO:-0500 DTSTART:20070311T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU TZNAME:CDT END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0500 TZOFFSETTO:-0600 DTSTART:20071104T020000 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU TZNAME:CST END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:25ebe097-c40d-41ca-8066-e1e6ee6b93bc.234601@calendar.missouristate.edu CREATED:20240318T152012Z LAST-MODIFIED:20240318T152012Z LOCATION: SUMMARY:PAMS Seminar: "Theory-driven Experimental Search of Novel Magnetic Materials for Nanotechnology Applications" by Dr. Dipanjan Mazumdar DESCRIPTION:Dr. Dipanjan MazumdarSouthern Illinois University\n\n\nAbstrac t:\n\n\nWe are interested in growing new inorganic materials in thin film form and tuning their physical properties through size\, chemical doping \, interface\, and external tuning parameters (light\, magnetic field\, e tc.). In the past few years\, my group has focused on the growth and inve stigation of magnetic thin films for application in emerging nanotechnolo gy areas such as spintronics. This effort has involved several graduate a nd undergraduate students and led to 2 Master's and 2 PhD’s in the past t hree and half years. For this talk\, after a brief overview of the resear ch area and the desired functional properties\, I will present the result s of a theory-driven experimental search of novel magnetic materials that potentially support the desired properties. Thermodynamically stable bin ary and ternary materials were identified in prior theoretical searches i n the Heusler family (general formula X2YZ). Among them\, we are interest ed in Mn-based ternary alloys due to their tunable magnetic and crystal p roperties. Using the magnetron co-sputtering method\, we synthesized pote ntially high-performance Mn3-xFexSn thin films with x= 0\, 1\, and 2 and evaluated the structural\, magnetic\, and electrical properties. All samp les grew polycrystalline with a hexagonal phase. Electric transport measu rements revealed a non-metallic behavior for Mn2FeSn\, whereas Fe2MnSn an d Mn3Sn showed metallic behavior. Mn3Sn exhibited a low magnetic moment ( 0.4 µB/f.u). The addition of Fe increased the moment to 3.5 µB/f.u (Mn2Fe Sn) and 4.7 µB/f.u (Fe2MnSn). Mn2FeSn displayed a large exchange bias eff ect with the coexistence of antiferromagnetic and ferromagnetic phases be low room temperature\, whereas Fe2MnSn demonstrated a robust ferromagneti c phase with a Curie temperature of 512 K. Both materials exhibited a siz able magnetic anisotropy of close to 0.5 MJ/m3 at 2 K. Still\, only Fe2Mn Sn is viable for spintronics applications due to its room-temperature fun ctionality.\n\n\n\n\n\nThis is a Zoom seminar: 915 2072 1543 X-ALT-DESC;FMTTYPE=text/html:<html><head><title></title></head><body><p><b >Dr. Dipanjan Mazumdar<br></b><b>Southern Illinois University</b><b><br>< /b></p>\n<p>Abstract:</p>\n<p>We are interested in growing new inorganic materials in thin film form and tuning their physical properties through size\, chemical doping\, interface\, and external tuning parameters (ligh t\, magnetic field\, etc.). In the past few years\, my group has focused on the growth and investigation of magnetic thin films for application in emerging nanotechnology areas such as spintronics. This effort has invol ved several graduate and undergraduate students and led to 2 Master's and 2 PhD’s in the past three and half years. For this talk\, after a brief overview of the research area and the desired functional properties\, I w ill present the results of a theory-driven experimental search of novel m agnetic materials that potentially support the desired properties. Thermo dynamically stable binary and ternary materials were identified in prior theoretical searches in the Heusler family (general formula X2YZ). Among them\, we are interested in Mn-based ternary alloys due to their tunable magnetic and crystal properties. Using the magnetron co-sputtering method \, we synthesized potentially high-performance Mn3-xFexSn thin films with x= 0\, 1\, and 2 and evaluated the structural\, magnetic\, and electrica l properties. All samples grew polycrystalline with a hexagonal phase. El ectric transport measurements revealed a non-metallic behavior for Mn2FeS n\, whereas Fe2MnSn and Mn3Sn showed metallic behavior. Mn3Sn exhibited a low magnetic moment (0.4 µB/f.u). The addition of Fe increased the momen t to 3.5 µB/f.u (Mn2FeSn) and 4.7 µB/f.u (Fe2MnSn). Mn2FeSn displayed a l arge exchange bias effect with the coexistence of antiferromagnetic and f erromagnetic phases below room temperature\, whereas Fe2MnSn demonstrated a robust ferromagnetic phase with a Curie temperature of 512 K. Both mat erials exhibited a sizable magnetic anisotropy of close to 0.5 MJ/m3 at 2 K. Still\, only Fe2MnSn is viable for spintronics applications due to it s room-temperature functionality.</p>\n<p></p>\n<p>This is a Zoom seminar : 915 2072 1543</p>\n<p></p></body></html> DTSTART;TZID=America/Chicago:20240321T160000 DTEND;TZID=America/Chicago:20240321T170000 SEQUENCE:0 URL:https://physics.missouristate.edu/seminars.htm CATEGORIES:Public,Alumni,Current Students,Faculty,Future Students,Staff END:VEVENT END:VCALENDAR