BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/Denver BEGIN:DAYLIGHT DTSTART:20190310T030000 TZOFFSETFROM:-0700 TZOFFSETTO:-0600 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:MDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20191103T010000 TZOFFSETFROM:-0600 TZOFFSETTO:-0700 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:MST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20191231T033756Z UID:1C8350EC-69D7-470F-9275-ECC8F592A737 DTSTART;TZID=America/Denver:20190920T110000 DTEND;TZID=America/Denver:20190920T121500 DESCRIPTION:In our research we show that the combination of atomistic and m icromagnetic simulations in connection with TEM and synchrotron measuremen ts can give a better understanding\n\nof the morphological and chemical co mposition of magnetic and metallic hybrid materials [1\,2]. The problem of interface and grain boundaries and its changes in intrinsic properties ar e rooted in structural defects of crystal structures and influence effects like intrinsic magnetic properties and interface phenomena like spin scat tering. We discuss these effects and its influence on permanent magnets us ed in hybrid cars\, over novel magnetic hybrid structures to artificial sp in ice structures. Anisotropic sintered NdFeB magnets consist of polyhedra l grains\, which have a distribution of size and shape\, separated by a gr ain boundary phase with various compositions. Such magnets are sensitive t o the crystallographic structure near grain boundaries and interfaces\, an d this considerably influences the magnetic properties that can be underst ood and quantified with solid‐state molecular dynamics. It is shown that change in local properties can be linked to the strain/stress effects on the atomistic scale. Such interface and coupling effects also play an impo rtant role in magnetic hybrid as well as in artificial spin ice structures . Where it was found that heterogeneous nanostructures of Co/Pd and permal loy multilayers exhibit mutual domain imprinting that support either a pur e closure-­‐domain pattern\, a mixed Landau‐maze domain state or a pe rpendicular exchange-­‐spring magnetization structure and in artificial spin ice systems where geometrical manipulation of arrays can induce chir ality. Control over such hybrid and spin ice structures could lead to the development of a wide range of technologies\, from multilayer data storage media and radio‐frequency nano‐oscillators [3] to encryption applicat ions[4].\n\nReferences:\n\n[1] G. Hrkac\, T. Woodcock\, et al\, Applied Ph ysics Letters 97\, 2010\, 232511\n\n[2] T. Woodcock\, Y. Zhang\, G. Hrkac et al. Scripta Materialia\, Volume 67\, Issue 6\, 2012\, Pages 536–541\n \n[3] P. Wohlhütter\, M. Bryan et.al. Nature Communications 6\, 7836 (201 5)\n\n[4] S. Gliga\, G. Hrkac et al. Nature Materials 16\, 1106–1111 (20 17)\n\nCo-sponsored by: UCCS\n\nSpeaker(s): Gino Hrkac\, \n\nRoom: A204\, Bldg: Osborne\, 1420 Austin Bluffs Pkwy\, Colorado Springs\, Colorado\, Un ited States\, 80918 LOCATION:Room: A204\, Bldg: Osborne\, 1420 Austin Bluffs Pkwy\, Colorado Sp rings\, Colorado\, United States\, 80918 ORGANIZER:zcelinsk@uccs.edu SEQUENCE:0 SUMMARY:ATOMs ‐ Atomistic to Micromagnetic modelling: from permanent magn ets to magnetic hybrid materials URL;VALUE=URI:https://events.vtools.ieee.org/m/216615 X-ALT-DESC:Description: <br /><p>In our research we show that the combinati on of atomistic and micromagnetic simulations in connection with TEM and s ynchrotron measurements can give a better understanding&nbsp\;&nbsp\;</p>\ n<p>of the morphological and chemical composition of magnetic and metallic hybrid materials [1\,2]. The problem of interface and grain boundaries an d its changes in intrinsic properties are rooted in structural defects of crystal structures and influence effects like intrinsic magnetic propertie s and interface phenomena like spin scattering. We discuss these effects a nd its influence on permanent magnets used in hybrid cars\, over novel mag netic hybrid structures to artificial spin ice structures. Anisotropic sin tered NdFeB magnets consist of polyhedral grains\, which have a distributi on of size&nbsp\;&nbsp\;&nbsp\;&nbsp\;&nbsp\;&nbsp\;&nbsp\;&nbsp\;&nbsp\;& nbsp\;&nbsp\; and shape\, separated by a grain boundary phase with various compositions. Such magnets are sensitive to the crystallographic structur e near grain boundaries and interfaces\, and this considerably influences the magnetic properties that can be understood and quantified with solid ‐state molecular dynamics. It is shown that change in local properties c an be linked to the strain/stress effects on the atomistic scale. Such int erface and coupling effects also play an important role in magnetic hybrid as well as in artificial spin ice structures. Where it was found that het erogeneous nanostructures of Co/Pd and permalloy multilayers exhibit mutua l domain imprinting that support either a pure closure-&shy\;‐domain pat tern\, a mixed Landau‐maze domain state or a perpendicular exchange-&shy \;‐spring magnetization structure and in artificial spin ice systems whe re geometrical manipulation of arrays can induce chirality. Control over s uch hybrid and spin ice structures could lead to the development of a wide range of technologies\, from multilayer data storage media and radio‐fr equency nano‐oscillators [3] to encryption applications[4].</p>\n<p>&nbs p\;</p>\n<p>References:</p>\n<p>[1] G. Hrkac\, T. Woodcock\, et al\, Appli ed Physics Letters 97\, 2010\, 232511</p>\n<p>[2] T. Woodcock\, Y. Zhang\, G. Hrkac et al. Scripta Materialia\, Volume 67\, Issue 6\, 2012\, Pages 5 36&ndash\;541</p>\n<p>[3] P. Wohlh&uuml\;tter\, M. Bryan et.al. Nature Com munications 6\, 7836 (2015)</p>\n<p>[4] S. Gliga\, G. Hrkac et al. Nature Materials 16\, 1106&ndash\;1111 (2017)</p> END:VEVENT END:VCALENDAR