{"id":12049,"date":"2026-03-16T15:19:39","date_gmt":"2026-03-16T14:19:39","guid":{"rendered":"https:\/\/fermi.univ-tlse3.fr\/?post_type=tribe_events&#038;p=12049"},"modified":"2026-03-17T15:22:08","modified_gmt":"2026-03-17T14:22:08","slug":"magnetoelastic-effects-in-the-2d-limit-enhanced-by-intense-magnetic-fields-in-croc-tristan-riccardi-lncmi-seminar-19-03-2026-14h","status":"publish","type":"tribe_events","link":"https:\/\/fermi.univ-tlse3.fr\/fr\/home\/event\/magnetoelastic-effects-in-the-2d-limit-enhanced-by-intense-magnetic-fields-in-croc-tristan-riccardi-lncmi-seminar-19-03-2026-14h\/","title":{"rendered":"Magnetoelastic effects in the 2D limit enhanced by intense magnetic fields in CrOC. &#8211; (Tristan Riccardi \/  LNCMI \/ Seminar). &#8211; 19\/03\/2026, 14H"},"content":{"rendered":"<p><span style=\"font-size: 20px; background-color: #f18500;\">Seminar LNCMI<\/span><\/p>\n<p><span style=\"font-size: 20px;\"><span style=\"color: #191970;\"><strong>Tristan Riccardi<\/strong><\/span>,\u00a0LNCMI-Grenoble<\/span><\/p>\n<p><span style=\"background-color: #cecece;\">Seminar LNCMI, 19\/03\/2026, 14H, <strong>LNCMI, Salle Pauthenet<\/strong><\/span><\/p>\n<p><span style=\"font-size: 20px;\"><span style=\"color: #191970;\"><strong>Abstract<\/strong><\/span><\/span><br \/>\nCrOCl is a van der Waals magnet featuring a rich phase diagram <strong>[1,2]<\/strong> related to its low-symmetry structure, structural phase transitions, and a subtle competition of interactions potentially leading to magnetic frustration. In a previously published work <strong>[3]<\/strong>, we showed how, exploiting the strong magneoelastic coupling in the material, we can use Raman scattering spectroscopy, performed at variable temperature and magnetic field, to decipher the magnetic phase diagram of bulk CrOCl.<\/p>\n<p> Here we extend this work to the investigation of thin flakes of CrOCl down to the single layer. While previous works on thin layers have used transport techniques and did not show a clear evolution of the properties with the thickness <strong>[4]<\/strong>, we were able to highlight strong effects of the coupling of the lattice with the external field, leading to zone-folded phonons (produced by the magnetic supercell) or blue\/red-shifts of the phonon energies at the metamagnetic transitions to build a phase diagram of the material at varying thickness. Moreover, we were able to demonstrate the existence of a strong magnetostriction effect at high magnetic field (up to 30T), present for all thicknesses down to the monolayer.<\/p>\n<p><strong>Lien Zoom<\/strong> :\u00a0<a href=\"https:\/\/univ-grenoble-alpes-fr.zoom.us\/j\/94228207316?pwd=khTdznxeFy1ZUYkYftQ0QSox6Fz3iK.1\">https:\/\/univ-grenoble-alpes-fr.zoom.us\/j\/94228207316?pwd=khTdznxeFy1ZUYkYftQ0QSox6Fz3iK.1<\/a><br \/>\n<strong><br \/>\nReferences:<\/strong><\/p>\n<p><strong>[1]<\/strong> P. G. Reuvekamp. Investigation into the magnetic and the structural properties of two low-dimensional<br \/>\nantiferromagnets TiPO4 and CrOCl. 2014<\/p>\n<p><strong>[2]<\/strong> P. Gu &#038; al. Magnetic phase transitions and magnetoelastic coupling in a two- dimensional stripy<br \/>\nantiferromagnet. Nano Letters. 22, 1233\u20131241. 2022<\/p>\n<p><strong>[3]<\/strong> A. Pawbake &#038; al. Magnetic Phases and Zone-Folded Phonons in a Frustrated van der Waals Magnet.<br \/>\nACS Nano. 19, 26, 23693\u201323702. 2025<\/p>\n<p><strong>[4]<\/strong> M. Zhang &#038; al. Spin-Lattice Coupled Metamagnetism in Frustrated van der Waals Magnet CrOCl. Small.<br \/>\n19, 2300964. 2023<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Lieu : Salle Pauthenet<\/p>\n","protected":false},"author":5,"featured_media":0,"template":"","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","neve_meta_reading_time":"","_tribe_events_status":"","_tribe_events_status_reason":"","footnotes":""},"tags":[],"tribe_events_cat":[48,311,233],"class_list":["post-12049","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-events","tribe_events_cat-lncmi","tribe_events_cat-seminars","cat_events","cat_lncmi","cat_seminars"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Magnetoelastic effects in the 2D limit enhanced by intense magnetic fields in CrOC. - (Tristan Riccardi \/ LNCMI \/ Seminar). - 19\/03\/2026, 14H - FeRMI<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fermi.univ-tlse3.fr\/fr\/home\/event\/magnetoelastic-effects-in-the-2d-limit-enhanced-by-intense-magnetic-fields-in-croc-tristan-riccardi-lncmi-seminar-19-03-2026-14h\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Magnetoelastic effects in the 2D limit enhanced by intense magnetic fields in CrOC. - (Tristan Riccardi \/ LNCMI \/ Seminar). - 19\/03\/2026, 14H - FeRMI\" \/>\n<meta property=\"og:description\" content=\"Lieu : Salle Pauthenet\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fermi.univ-tlse3.fr\/fr\/home\/event\/magnetoelastic-effects-in-the-2d-limit-enhanced-by-intense-magnetic-fields-in-croc-tristan-riccardi-lncmi-seminar-19-03-2026-14h\/\" \/>\n<meta property=\"og:site_name\" content=\"FeRMI\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-17T14:22:08+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/event\\\/magnetoelastic-effects-in-the-2d-limit-enhanced-by-intense-magnetic-fields-in-croc-tristan-riccardi-lncmi-seminar-19-03-2026-14h\\\/\",\"url\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/event\\\/magnetoelastic-effects-in-the-2d-limit-enhanced-by-intense-magnetic-fields-in-croc-tristan-riccardi-lncmi-seminar-19-03-2026-14h\\\/\",\"name\":\"Magnetoelastic effects in the 2D limit enhanced by intense magnetic fields in CrOC. - (Tristan Riccardi \\\/ LNCMI \\\/ Seminar). - 19\\\/03\\\/2026, 14H - FeRMI\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/#website\"},\"datePublished\":\"2026-03-16T14:19:39+00:00\",\"dateModified\":\"2026-03-17T14:22:08+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/event\\\/magnetoelastic-effects-in-the-2d-limit-enhanced-by-intense-magnetic-fields-in-croc-tristan-riccardi-lncmi-seminar-19-03-2026-14h\\\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/event\\\/magnetoelastic-effects-in-the-2d-limit-enhanced-by-intense-magnetic-fields-in-croc-tristan-riccardi-lncmi-seminar-19-03-2026-14h\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/fr\\\/home\\\/event\\\/magnetoelastic-effects-in-the-2d-limit-enhanced-by-intense-magnetic-fields-in-croc-tristan-riccardi-lncmi-seminar-19-03-2026-14h\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u00c9v\u00e8nements\",\"item\":\"https:\\\/\\\/fermi.univ-tlse3.fr\\\/events\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Magnetoelastic effects in the 2D limit enhanced by intense magnetic fields in CrOC. &#8211; 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