BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/Los_Angeles BEGIN:DAYLIGHT DTSTART:20230312T030000 TZOFFSETFROM:-0800 TZOFFSETTO:-0700 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:PDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20231105T010000 TZOFFSETFROM:-0700 TZOFFSETTO:-0800 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:PST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20230503T230115Z UID:FB689C69-DDF0-42B6-A65A-4546E260DFB7 DTSTART;TZID=America/Los_Angeles:20230426T183000 DTEND;TZID=America/Los_Angeles:20230426T200000 DESCRIPTION:Hybrid Meeting\nOn-line and In Person at Quadrant\n\nRefreshmen ts will be available at Quadrant prior to the start of the presentation.\n \nResearch on curvature effects in magnetic nanostructures is attracting m uch interest as they offer novel alternatives to planar systems. In partic ular\, the cylindrical geometry introduces significant singularities in th e magnetic response of ferromagnetic wires just from their curvature\, whi ch primarily depends on their diameter\, length\, and aspect ratio. The ma in magnetic configurations include axial\, transverse\, and vortex (circul ar with a singularity at the axis). Micrometric-diameter amorphous wires w ith high magnetostriction re-magnetize through an ideal millimeter-long si ngle domain wall propagating at kilometer-per-second speeds that results i n a square hysteresis loop. Such bistable behavior and their magnetoelasti c properties are the basis for various devices (e.g.\, stress and temperat ure sensors\, electromagnetic shielding). On the other hand\, ultrasoft no n-magnetostrictive microwires are employed in very sensitive field sensors based on their giant magnetoimpedance effect or in flux-gate magnetometer s.\n\nNanowires (20 nm to 400 nm in diameter) present an outstanding behav ior where the crystalline structure plays a major role in competition with shape anisotropy. Cylindrical nanowires are considered as scaffolds for a dvanced three-dimensional nanoarchitectures exploiting intrinsic curvature that introduces significant differences from planar-based nanotechnologie s. They are proposed for novel sensor devices and magnets\, and their inte rconnecting arrays are considered for energy devices or brain-inspired com puting. An ultimate goal is currently the investigation of the magnetizati on reversal modes in individual nanowires by advanced techniques\, e.g.\, X-ray magnetic circular dichroism (XMCD) coupled to photoemission electron microscopy (PEEM)\, magnetic force microscopy (MFM)\, magneto-optical Ker r effect (MOKE)\, electron holography\, and micromagnetic simulations. The y show axial\, transverse\, vortex\, and more complex\, exotic magnetic co nfigurations and effects (e.g.\, magnetization ratchets\, skyrmion tubes\, helical vortices). The reversal nucleates at the nanowire ends involving singularities (e.g.\, Bloch-point walls) and at local transition regions ( e.g.\, modulations in diameter and compositional modulations between segme nts of differently designed magnetic properties\, such as ferromagnetic/fe rromagnetic (FM/FM) or ferromagnetic/nonmagnetic (FM/NM). Individual nanow ires are currently used or proposed for biomedical applications\, such as cancer treatment\, magnetic resonance imaging (MRI) contrast agents\, or i n composites for their antimicrobial activity.\n\nSpeaker(s): Manuel Vázq uez\, PhD\, \n\nBldg: Quadrant\, 1120 Ringwood Ct.\, San Jose\, California \, United States\, 95131\, Virtual: https://events.vtools.ieee.org/m/35558 7 LOCATION:Bldg: Quadrant\, 1120 Ringwood Ct.\, San Jose\, California\, Unite d States\, 95131\, Virtual: https://events.vtools.ieee.org/m/355587 ORGANIZER:secretary@scvmag.org SEQUENCE:2 SUMMARY:Cylindrical Micro- and Nanowires: From Curvature Effects on Magneti zation to Sensing Applications URL;VALUE=URI:https://events.vtools.ieee.org/m/355587 X-ALT-DESC:Description: <br /><h3>Hybrid Meeting<br />On-line and In Person at Quadrant</h3>\n<p>Refreshments will be available at Quadrant prior to the start of the presentation.</p>\n<p>Research on curvature effects in ma gnetic nanostructures is attracting much interest as they offer novel alte rnatives to planar systems. In particular\, the cylindrical geometry intro duces significant singularities in the magnetic response of ferromagnetic wires just from their curvature\, which primarily depends on their diamete r\, length\, and aspect ratio. The main magnetic configurations include ax ial\, transverse\, and vortex (circular with a singularity at the axis). M icrometric-diameter amorphous wires with high magnetostriction re-magnetiz e through an ideal millimeter-long single domain wall propagating at kilom eter-per-second speeds that results in a square hysteresis loop. Such bist able behavior and their magnetoelastic properties are the basis for variou s devices (e.g.\, stress and temperature sensors\, electromagnetic shieldi ng). On the other hand\, ultrasoft non-magnetostrictive microwires are emp loyed in very sensitive field sensors based on their giant magnetoimpedanc e effect or in flux-gate magnetometers.</p>\n<p>Nanowires (20 nm to 400 nm in diameter) present an outstanding behavior where the crystalline struct ure plays a major role in competition with shape anisotropy. Cylindrical n anowires are considered as scaffolds for advanced three-dimensional nanoar chitectures exploiting intrinsic curvature that introduces significant dif ferences from planar-based nanotechnologies. They are proposed for novel s ensor devices and magnets\, and their interconnecting arrays are considere d for energy devices or brain-inspired computing. An ultimate goal is curr ently the investigation of the magnetization reversal modes in individual nanowires by advanced techniques\, e.g.\, X-ray magnetic circular dichrois m (XMCD) coupled to photoemission electron microscopy (PEEM)\, magnetic fo rce microscopy (MFM)\, magneto-optical Kerr effect (MOKE)\, electron holog raphy\, and micromagnetic simulations. They show axial\, transverse\, vort ex\, and more complex\, exotic magnetic configurations and effects (e.g.\, magnetization ratchets\, skyrmion tubes\, helical vortices). The reversal nucleates at the nanowire ends involving singularities (e.g.\, Bloch-poin t walls) and at local transition regions (e.g.\, modulations in diameter a nd compositional modulations between segments of differently designed magn etic properties\, such as ferromagnetic/ferromagnetic (FM/FM) or ferromagn etic/nonmagnetic (FM/NM). Individual nanowires are currently used or propo sed for biomedical applications\, such as cancer treatment\, magnetic reso nance imaging (MRI) contrast agents\, or in composites for their antimicro bial activity.</p> END:VEVENT END:VCALENDAR