{"id":48311,"date":"2021-11-18T17:15:54","date_gmt":"2021-11-18T15:15:54","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=48311"},"modified":"2022-01-17T15:18:41","modified_gmt":"2022-01-17T13:18:41","slug":"expose-de-benjamin-verlhac-postdoctorant-a-luniversite-radboud-a-nijmegen-pays-bas-thermally-induced-magnetic-order-from-glassiness-in-elemental-neodymium","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/actualites\/expose-de-benjamin-verlhac-postdoctorant-a-luniversite-radboud-a-nijmegen-pays-bas-thermally-induced-magnetic-order-from-glassiness-in-elemental-neodymium.html","title":{"rendered":"Expos\u00e9 de Benjamin Verlhac, postdoctorant \u00e0 l\u2019Universit\u00e9 Radboud \u00e0 Nijmegen (Pays-Bas) : Thermally-induced magnetic order from glassiness in elemental neodymium"},"content":{"rendered":"<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kmkuyf-6c220e7a874115f90df38c02a84156b8\">\n.flex_column.av-kmkuyf-6c220e7a874115f90df38c02a84156b8{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-kmkuyf-6c220e7a874115f90df38c02a84156b8 av_one_full  avia-builder-el-0  avia-builder-el-no-sibling  first flex_column_div av-zero-column-padding'     ><section  class='av_textblock_section av-kw537jwb-c89fe0a2af90653e42f357360d2a58d4'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h3 style=\"text-align: center;\">Expos\u00e9 de Benjamin Verlhac postdoctorant \u00e0 l&rsquo;Universit\u00e9 Radboud \u00e0 Nijmegen (Pays-Bas)<\/h3>\n<p>Benjamin fera un expos\u00e9 sur <strong>ses travaux en cours<\/strong> (<strong>microscopie champ proche sous champ magn\u00e9tique<\/strong>) :<\/p>\n<h6 style=\"text-align: center;\"><em>\u00ab\u00a0Thermally-induced magnetic order from glassiness in elemental neodymium\u00a0\u00bb<\/em><\/h6>\n<blockquote>\n<p>Le vendredi 26\/11 \u00e0 11h<br \/>\nIEMN &#8211; Laboratoire central LCI \u2013 Villeneuve d\u2019Ascq &#8211; Salle du Conseil<\/p>\n<\/blockquote>\n<h5>Abstract:<\/h5>\n<p>Thermally-induced magnetic order from glassiness in elemental neodymium<br \/>\nIn common thermodynamic systems, disorder can be induced by temperature which leads to phase transitions from order to disorder, exemplified by the well-known ferromagnetic-paramagnetic phase transition. However, disorder can also be induced by the existence of numerous metastable states due to frustration. This was recently exemplified by elemental neodymium for which a self-induced spin glass phase was reported between 30 mK and 4 K[1]. It was shown that this phase is solely caused by magnetic frustration within the dhcp lattice of neodymium and possesses the aging dynamics of a spin glass.<br \/>\nIn this talk, I will show that neodymium undergoes an unusual magnetic transition, where long range multi-Q order emerges from this spin-Q glass phase as temperature is increased from 5 K to 15 K[2]. By means of a temperature study using spin-polarized scanning tunneling microscopy, we characterize the very local order of the spin-Q glass phase and the long-range nature of the multi-Q order phase present at higher temperatures. From the measured magnetization maps, we quantify the phase transition and determine its critical temperature using two distinct analyses. These findings are supported by atomistic spin dynamics simulations, in which the phase transition is qualitatively reproduced and explained by a weakened frustration in the multi-Q order phase compared to the spin-Q glass phase.<\/p>\n<p>[1] Kamber, U. et al. Self-induced spin glass state in elemental and crystalline neodymium. Science 368, eaay6757, (2020).<br \/>\n[2] Verlhac, B. et al. Thermally-induced magnetic order from glassiness in elemental neodymium. arXiv:2109.04815 [cond-mat], (2021).<\/p>\n<h6>Contact:<\/h6>\n<div  class='avia-button-wrap av-rpqvoq-38ce4d5db940ecb0defc840611da8be3-wrap avia-button-left  avia-builder-el-2  avia-builder-el-no-sibling'><a href='mailto:sylvie.godey@univ-lille.fr'  class='avia-button av-rpqvoq-38ce4d5db940ecb0defc840611da8be3 av-link-btn avia-icon_select-yes-left-icon avia-size-small avia-position-left avia-color-silver'   aria-label=\"sylvie.godey@univ-lille.fr\"><span class='avia_button_icon avia_button_icon_left' aria-hidden='true' data-av_icon='\ue805' data-av_iconfont='entypo-fontello'><\/span><span class='avia_iconbox_title' >sylvie.godey@univ-lille.fr<\/span><\/a><\/div>\n<\/div><\/section><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":38302,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,40],"tags":[],"class_list":["post-48311","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","category-articles-temporaires-anglais"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/48311","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=48311"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/48311\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media\/38302"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=48311"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=48311"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=48311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}