BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/New_York BEGIN:DAYLIGHT DTSTART:20260308T030000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:EDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20261101T010000 TZOFFSETFROM:-0400 TZOFFSETTO:-0500 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:EST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20260913T140809Z UID:30B07852-C221-4F04-A8FE-0DD65036ECF4 DTSTART;TZID=America/New_York:20260918T123000 DTEND;TZID=America/New_York:20260918T133000 DESCRIPTION:Tailoring Magnetic Spin Textures in La 0.7 Sr 0.3 MnO 3 -Based Micromagnets\n\nThe development of next-generation computing devices based on spintronics and magnonics requires an\nunderstanding of how magnetic s pin textures can be tailored in patterned magnetic materials. Within the\n wide range of magnetic materials available\, complex oxides such as ferrom agnetic (FM)\nLa 0.7 Sr 0.3 MnO 3 (LSMO) provide an ideal platform for tai loring magnetic spin textures when\nlithographically patterned as nano/mic romagnets. This unique tunability arises due to the strong\ninteractions a mong charge\, spin\, lattice\, and orbital degrees of freedom. In this tal k I demonstrate how an\nintricate interplay exists between shape\, magneto crystalline anisotropy\, domain wall\, and magnetoelastic\nenergies due to the unique combination of magnetic parameters associated with LSMO. Using x-ray\nphotoemission electron microscopy\, I will show that the resulting FM spin textures can be controlled\nusing parameters such as micromagnet shape (circles\, squares\, triangles\, and hexagons with their edges\norie nted along different low-index crystallographic directions\, with and with out their core regions\nremoved (aka “donut structures”)) and temperat ure [1]. LSMO nanomagnets are also patterned into\nartificial spin-ice (AS I) structures [2]-[4]\, where large arrays of nanomagnets are arranged in geometries\nwhere all the magnetic interactions cannot be satisfied simult aneously. While one might expect shape\nanisotropy to dictate Ising states in the nanomagnets\, we observed the formation of both Ising and\ncomplex spin textures (CSTs) which consist of single- and double-vortex structure s depending on the\nnano-island width and center-to-center spacing. These CSTs alter the nature of dipolar coupling among\nnanomagnets\, giving rise to exotic physics in the ASI lattices. These studies demonstrate that com plex\noxides provide a unique platform for engineering FM spin textures fo r next-generation spin-based\ndevices.\n[1] M. S. Lee et al.\, “Tailorin g Spin Textures in Complex Oxide Micromagnets\,” ACS Nano\, 10\, 8545\n( 2016).\n[2] R. V. Chopdekar et al.\, “Nanostructured Complex Oxides as a Route Towards Thermal Behavior in\nArtificial Spin Ice Systems\,” Phys. Rev. Mater.\, 1\, 024401 (2017).\n[3] D. Sasaki et al.\, “Formation of Complex Spin Textures in Thermally Demagnetized La 0.7 Sr 0.3 MnO 3\nArtif icial-Spin-Ice Structures\,” Phys. Rev. Appl.\, 17\, 064057 (2022).\n[4] D. Sasaki et al.\, “Energetics of Ising-vortex interactions in La 0.7 S r 0.3 MnO 3 brickwork artificial spin\nices”\, Phys. Rev. B.\, 113\, 064 416 (2026)\n\nSpeaker(s): \, Yayoi Takamura\n\nRoom: 7500\, Bldg: Wean Hal l\, Carnegie Mellon University\, Pittsburgh\, Pennsylvania\, United States LOCATION:Room: 7500\, Bldg: Wean Hall\, Carnegie Mellon University\, Pittsb urgh\, Pennsylvania\, United States ORGANIZER:simranjs@andrew.cmu.edu SEQUENCE:20 SUMMARY: "IEEE Magnetics Society Distinguished Lecturer" Talk_Yayoi Takamur a URL;VALUE=URI:https://events.vtools.ieee.org/m/577411 X-ALT-DESC:Description: <br /><p><strong>Tailoring Magnetic Spin Textures i n La 0.7 Sr 0.3 MnO 3 -Based Micromagnets</strong></p>\n<p>The development of next-generation computing devices based on spintronics and magnonics r equires an<br>understanding of how magnetic spin textures can be tailored in patterned magnetic materials. Within the<br>wide range of magnetic mate rials available\, complex oxides such as ferromagnetic (FM)<br>La 0.7 Sr 0 .3 MnO 3 &nbsp\;(LSMO) provide an ideal platform for tailoring magnetic sp in textures when<br>lithographically patterned as nano/micromagnets. This unique tunability arises due to the strong<br>interactions among charge\, spin\, lattice\, and orbital degrees of freedom. In this talk I demonstrat e how an<br>intricate interplay exists between shape\, magnetocrystalline anisotropy\, domain wall\, and magnetoelastic<br>energies due to the uniqu e combination of magnetic parameters associated with LSMO. Using x-ray<br> photoemission electron microscopy\, I will show that the resulting FM spin textures can be controlled<br>using parameters such as micromagnet shape (circles\, squares\, triangles\, and hexagons with their edges<br>oriented along different low-index crystallographic directions\, with and without their core regions<br>removed (aka &ldquo\;donut structures&rdquo\;)) and temperature [1]. LSMO nanomagnets are also patterned into<br>artificial sp in-ice (ASI) structures [2]-[4]\, where large arrays of nanomagnets are ar ranged in geometries<br>where all the magnetic interactions cannot be sati sfied simultaneously. While one might expect shape<br>anisotropy to dictat e Ising states in the nanomagnets\, we observed the formation of both Isin g and<br>complex spin textures (CSTs) which consist of single- and double- vortex structures depending on the<br>nano-island width and center-to-cent er spacing. These CSTs alter the nature of dipolar coupling among<br>nanom agnets\, giving rise to exotic physics in the ASI lattices. These studies demonstrate that complex<br>oxides provide a unique platform for engineeri ng FM spin textures for next-generation spin-based<br>devices.<br>[1] &nbs p\;M. S. Lee et al.\, &ldquo\;Tailoring Spin Textures in Complex Oxide Mic romagnets\,&rdquo\; ACS Nano\, 10\, 8545<br>(2016).&nbsp\;<br>[2] &nbsp\;R . V. Chopdekar et al.\, &ldquo\;Nanostructured Complex Oxides as a Route T owards Thermal Behavior in<br>Artificial Spin Ice Systems\,&rdquo\; Phys. Rev. Mater.\, 1\, 024401 (2017).<br>[3] &nbsp\;D. Sasaki et al.\, &ldquo\; Formation of Complex Spin Textures in Thermally Demagnetized La 0.7 Sr 0.3 MnO 3<br>Artificial-Spin-Ice Structures\,&rdquo\; Phys. Rev. Appl.\, 17\, 064057 (2022).<br>[4] D. Sasaki et al.\, &ldquo\;Energetics of Ising-vort ex interactions in La 0.7 Sr 0.3 MnO 3 brickwork artificial spin<br>ices&r dquo\;\, Phys. Rev. B.\, 113\, 064416 (2026)</p> END:VEVENT END:VCALENDAR