BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/Denver BEGIN:DAYLIGHT DTSTART:20260308T030000 TZOFFSETFROM:-0700 TZOFFSETTO:-0600 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:MDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20261101T010000 TZOFFSETFROM:-0600 TZOFFSETTO:-0700 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:MST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20260924T190103Z UID:D008EBE1-244B-45DC-954A-BDB54D43F7B7 DTSTART;TZID=America/Denver:20260924T103000 DTEND;TZID=America/Denver:20260924T113000 DESCRIPTION:Abstract: Altermagnets are collinear magnetically ordered phase s with zero net magnetization and alternating spin polarization. These eme rgent materials combine fast magnetic dynamics with large spin band splitt ing. Both effects arise from strong (non-relativistic) exchange interactio ns between local magnetic moments and electron spins. I will present a phe nomenological theory of altermagnets that describes their unique magnetiza tion dynamics and magnetic textures. Focusing on prototypical d-wave alter magnets such as RuO₂\, we can intuitively explain the unique lifted dege neracy of their magnon spectra by the emergence of an effective\, sublatti ce-dependent\, anisotropic spin stiffness\, which arises naturally from th e phenomenological theory. I will discuss a symmetry-based approach to des cribe altermagnetic textures and dynamics using the altermagnet candidate Mn5Si3 as an example. The approach’s key point is an altermagnetic order parameter that formalizes the symmetry of the magnetic atoms’ local env ironment and enables the altermagnetic behaviour to be distilled [1]. I wi ll demonstrate how this concept enables us to reconstruct the equilibrium magnetic structure of Mn5Si3 from the field dependences of the anomalous H all effect [2]–[4]. Finally\, I will discuss the spin wave spectra and d ynamics of the altermagnetic domain wall\, focusing on a comparison betwee n the altermagnetic and antiferromagnetic phases of the material.\n\n[1] O . Gomonay et al.\, “Structure\, control\, and dynamics of altermagnetic textures\,” npj Spintronics\, vol. 2\, art. no. 35\, Jul. 2024\, doi: 10 .1038/s44306-024-00042-3.\n\n[2] J. Rial\, et al.\, “Altermagnetic varia nts in thin films of Mn5Si3\,” Phys. Rev. B\, vol. 110\, art. no. L22041 1\, Dec. 2024\, doi: 10.1103/PhysRevB.110.L220411.\n\n[3] M. Leiviskä\, e t al.\, “Anisotropy of the anomalous Hall effect in thin films of the al termagnet candidate Mn5Si3\,” Phys. Rev. B\, vol. 109\, art. no. 224430\ , Jun. 2024\, doi : 10.1103/PhysRevB.109.224430.\n\n[4] R. Zarzuela\, et a l.\, “Transport theory and spin-transfer physics in 𝑑-wave altermagne ts\,” Phys. Rev. B\, vol. 111\, art. no. 064422\, Feb. 2025\, doi: 10.11 03/PhysRevB.111.064422.\n\nSpeaker(s): Helen\n\nBoulder\, Colorado\, Unite d States LOCATION:Boulder\, Colorado\, United States ORGANIZER:samuel.oberdick@ieee.org SEQUENCE:7 SUMMARY:Structure\, Control\, and Dynamics of Altermagnetic Textures URL;VALUE=URI:https://events.vtools.ieee.org/m/576580 X-ALT-DESC:Description: <br /><p class="MsoNormal" style="margin-bottom: 4. 0pt\; text-align: justify\;"><strong><span style="mso-ascii-font-family: C alibri\; mso-ascii-theme-font: minor-latin\; mso-hansi-font-family: Calibr i\; mso-hansi-theme-font: minor-latin\; mso-bidi-font-family: Calibri\; ms o-bidi-theme-font: minor-latin\;">Abstract: </span></strong><span style="m so-ascii-font-family: Calibri\; mso-ascii-theme-font: minor-latin\; mso-ha nsi-font-family: Calibri\; mso-hansi-theme-font: minor-latin\; mso-bidi-fo nt-family: Calibri\; mso-bidi-theme-font: minor-latin\;">Altermagnets are collinear magnetically ordered phases with zero net magnetization and alte rnating spin polarization. These emergent materials combine fast magnetic dynamics with large spin band splitting. Both effects arise from strong (n on-relativistic) exchange interactions between local magnetic moments and electron spins. I will present a phenomenological theory of altermagnets t hat describes their unique magnetization dynamics and magnetic textures. F ocusing on prototypical d-wave altermagnets such as RuO₂\, we can intuit ively explain the unique lifted degeneracy of their magnon spectra by the emergence of an effective\, sublattice-dependent\, anisotropic spin stiffn ess\, which arises naturally from the phenomenological theory. I will disc uss a symmetry-based approach to describe altermagnetic textures and dynam ics using the altermagnet candidate Mn<sub>5</sub>Si<sub>3</sub> as an exa mple. The approach&rsquo\;s key point is an altermagnetic order parameter that formalizes the symmetry of the magnetic atoms&rsquo\; local environme nt and enables the altermagnetic behaviour to be distilled [1]. I will dem onstrate how this concept enables us to reconstruct the equilibrium magnet ic structure of Mn<sub>5</sub>Si<sub>3 </sub>from the field dependences of the anomalous Hall effect [2]&ndash\;[4]. Finally\, I will discuss the sp in wave spectra and dynamics of the altermagnetic domain wall\, focusing o n a comparison between the altermagnetic and antiferromagnetic phases of t he material.</span></p>\n<p class="MsoNormal"><span style="mso-ascii-font- family: Calibri\; mso-ascii-theme-font: minor-latin\; mso-hansi-font-famil y: Calibri\; mso-hansi-theme-font: minor-latin\; mso-bidi-font-family: Cal ibri\; mso-bidi-theme-font: minor-latin\;">[1]<span style="mso-spacerun: y es\;">&nbsp\; </span>O. Gomonay et al.\, &ldquo\;Structure\, control\, and dynamics of altermagnetic textures\,&rdquo\; npj Spintronics\, vol. 2\, a rt. no. 35\, Jul. 2024\, doi: 10.1038/s44306-024-00042-3. </span></p>\n<p class="MsoNormal"><span style="mso-ascii-font-family: Calibri\; mso-ascii- theme-font: minor-latin\; mso-hansi-font-family: Calibri\; mso-hansi-theme -font: minor-latin\; mso-bidi-font-family: Calibri\; mso-bidi-theme-font: minor-latin\;">[2]<span style="mso-spacerun: yes\;">&nbsp\; </span>J. Rial \, et al.\, &ldquo\;Altermagnetic variants in thin films of Mn<sub>5</sub> Si<sub>3</sub>\,&rdquo\; Phys. Rev. B\, vol. 110\, art. no. L220411\, Dec. 2024\, doi: 10.1103/PhysRevB.110.L220411. </span></p>\n<p class="MsoNorma l"><span style="mso-ascii-font-family: Calibri\; mso-ascii-theme-font: min or-latin\; mso-hansi-font-family: Calibri\; mso-hansi-theme-font: minor-la tin\; mso-bidi-font-family: Calibri\; mso-bidi-theme-font: minor-latin\;"> [3]<span style="mso-spacerun: yes\;">&nbsp\; </span>M. Leivisk&auml\;\, et al.\, &ldquo\;Anisotropy of the anomalous Hall effect in thin films of th e altermagnet candidate Mn5Si3\,&rdquo\; Phys. Rev. B\, vol. 109\, art. no . 224430\, Jun. 2024\, doi : 10.1103/PhysRevB.109.224430.</span></p>\n<p c lass="MsoNormal"><span style="mso-ascii-font-family: Calibri\; mso-ascii-t heme-font: minor-latin\; mso-hansi-font-family: Calibri\; mso-hansi-theme- font: minor-latin\; mso-bidi-font-family: Calibri\; mso-bidi-theme-font: m inor-latin\;">[4]<span style="mso-spacerun: yes\;">&nbsp\; </span>R. Zarzu ela\, et al.\, &ldquo\;Transport theory and spin-transfer physics in </spa n><span style="font-family: 'Cambria Math'\,serif\; mso-bidi-font-family: 'Cambria Math'\;">𝑑</span><span style="mso-ascii-font-family: Calibri\; mso-ascii-theme-font: minor-latin\; mso-hansi-font-family: Calibri\; mso- hansi-theme-font: minor-latin\; mso-bidi-font-family: Calibri\; mso-bidi-t heme-font: minor-latin\;">-wave altermagnets\,&rdquo\; Phys. Rev. B\, vol. 111\, art. no. 064422\, Feb. 2025\, doi: 10.1103/PhysRevB.111.064422.</sp an></p> END:VEVENT END:VCALENDAR