{"id":72682,"date":"2025-02-18T13:48:06","date_gmt":"2025-02-18T11:48:06","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=72682"},"modified":"2025-02-25T12:33:17","modified_gmt":"2025-02-25T10:33:17","slug":"des-memoires-qui-utilisent-la-chaleur-pour-stocker-linformation","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/newsletter\/des-memoires-qui-utilisent-la-chaleur-pour-stocker-linformation.html","title":{"rendered":"Des m\u00e9moires qui utilisent la chaleur pour stocker l\u2019information"},"content":{"rendered":"<section  class='av_textblock_section av-m7afef81-45393b73ab7d0fd6ccfd0537d8206440'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h1 style=\"font-weight: 400; text-align: center;\"><strong><span style=\"color: #991f0f;\">Des m\u00e9moires qui utilisent la chaleur pour stocker l\u2019information<\/span><\/strong><\/h1>\n<\/div><\/section>\n<div  class='flex_column av-18pksve-27b76bae1341fe470956e7b71a54f78d av_one_full  avia-builder-el-1  el_after_av_textblock  el_before_av_hr  first flex_column_div  column-top-margin'     ><section  class='av_textblock_section av-m7bxini5-1982c24b8822cf1b3c865c9457ac73aa'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><div id=\"attachment_72776\" style=\"width: 1410px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/composants_chaleur_8.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-72776\" class=\"wp-image-72776 size-full\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/composants_chaleur_8.jpg\" alt=\"Interface G(T) TiN x3,6 - Images de microscopie \u00e9lectronique en transmission de haute r\u00e9solution montrant la r\u00e9solution atomique ainsi que la composition chimique de la couche.\" width=\"1400\" height=\"344\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/composants_chaleur_8.jpg 1400w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/composants_chaleur_8-300x74.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/composants_chaleur_8-1030x253.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/composants_chaleur_8-768x189.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/composants_chaleur_8-18x4.jpg 18w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/composants_chaleur_8-705x173.jpg 705w\" sizes=\"auto, (max-width: 1400px) 100vw, 1400px\" \/><\/a><p id=\"caption-attachment-72776\" class=\"wp-caption-text\">Interface G(T) TiN x3,6 &#8211; Images de microscopie \u00e9lectronique en transmission de haute r\u00e9solution montrant la r\u00e9solution atomique ainsi que la composition chimique de la couche.<\/p><\/div>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-m7agu8x4-aa7ab05dd1a73089d8d7d712dadb431d\">\n#top .hr.av-m7agu8x4-aa7ab05dd1a73089d8d7d712dadb431d{\nmargin-top:20px;\nmargin-bottom:30px;\n}\n.hr.av-m7agu8x4-aa7ab05dd1a73089d8d7d712dadb431d .hr-inner{\nwidth:50px;\nborder-color:#ad2d24;\nmax-width:45%;\n}\n.hr.av-m7agu8x4-aa7ab05dd1a73089d8d7d712dadb431d .av-seperator-icon{\ncolor:#ad2d24;\n}\n<\/style>\n<div  class='hr av-m7agu8x4-aa7ab05dd1a73089d8d7d712dadb431d hr-custom  avia-builder-el-3  el_after_av_one_full  el_before_av_one_fifth  hr-center hr-icon-yes'><span class='hr-inner inner-border-av-border-fat'><span class=\"hr-inner-style\"><\/span><\/span><span class='av-seperator-icon' aria-hidden='true' data-av_icon='\ue808' data-av_iconfont='entypo-fontello'><\/span><span class='hr-inner inner-border-av-border-fat'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<div  class='flex_column av-2zrohca-280c220b1fd57f193d57ff174d6b1206 av_one_fifth  avia-builder-el-4  el_after_av_hr  el_before_av_two_fifth  first flex_column_div av-hide-on-mobile'     ><section  class='av_textblock_section av-2q37gyy-7c9c0cb81a34dd6b26357daa24fc96d1'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: center;\"><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/composants_chaleur_14.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-72826 size-full aligncenter\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/composants_chaleur_14.jpg\" alt=\"\" width=\"422\" height=\"1715\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/composants_chaleur_14.jpg 422w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/composants_chaleur_14-74x300.jpg 74w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/composants_chaleur_14-378x1536.jpg 378w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/composants_chaleur_14-3x12.jpg 3w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/02\/composants_chaleur_14-369x1500.jpg 369w\" sizes=\"auto, (max-width: 422px) 100vw, 422px\" \/><\/a><\/p>\n<\/div><\/section><\/div>\n<div  class='flex_column av-24syley-97a2ae9d7af8091aafcec3d99e7b0870 av_two_fifth  avia-builder-el-6  el_after_av_one_fifth  el_before_av_two_fifth  flex_column_div'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1iv4yay-c0e1112f81de2a5fde6161d2ae4eb73a\">\n#top .av_textblock_section.av-1iv4yay-c0e1112f81de2a5fde6161d2ae4eb73a .avia_textblock{\ntext-align:justify;\n}\n<\/style>\n<section  class='av_textblock_section av-1iv4yay-c0e1112f81de2a5fde6161d2ae4eb73a'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><blockquote>\n<p><strong><span style=\"color: #991f0f;\">Les composants \u00e9lectroniques chauffent et c\u2019est d\u2019ailleurs une source de probl\u00e8mes et de pertes \u00e9nerg\u00e9tiques. Mais saviez-vous que certains composants utilisent la chaleur comme un levier pour stocker de l\u2019information\u00a0? Une \u00e9quipe de l\u2019IEMN s\u2019int\u00e9resse aux propri\u00e9t\u00e9s thermiques des mat\u00e9riaux dits \u00ab\u00a0\u00e0 changement de phase\u00a0\u00bb utilis\u00e9s dans ces m\u00e9moires d\u2019un genre nouveau. Les r\u00e9sultats sont publi\u00e9s dans la revue Journal of\u00a0Applied Physics.<\/span><\/strong><\/p>\n<\/blockquote>\n<p><strong><span style=\"color: #ff7b00;\"><span style=\"color: #008080;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-725448141568c72c97de4f331a1259f8\">\n.av_font_icon.av-mqde7m-725448141568c72c97de4f331a1259f8{\ncolor:#991f0f;\nborder-color:#991f0f;\n}\n.av_font_icon.av-mqde7m-725448141568c72c97de4f331a1259f8 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-725448141568c72c97de4f331a1259f8 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue857' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/span><\/span>Les m\u00e9moires \u00e0 changement de phase poss\u00e8dent de nombreux avantages parmi lesquels une grande capacit\u00e9 de miniaturisation, une consommation r\u00e9duite et la capacit\u00e9 de conserver leur dernier \u00e9tat apr\u00e8s utilisation, d\u2019o\u00f9 le qualificatif de non-volatile.<\/strong> Cette propri\u00e9t\u00e9 tr\u00e8s utile vient du mat\u00e9riau utilis\u00e9, dans notre cas le GeSbTe, un verre de la famille des chalcog\u00e9nures qui poss\u00e8de une phase d\u00e9sordonn\u00e9e, \u00e9lectriquement isolante, et des phases cristallines conductrices. Les m\u00e9moires PCM (Phase-Change Memories) utilisent une couche fine de ce mat\u00e9riau et des \u00e9lectrodes qui viennent \u00e9chauffer une zone nanom\u00e9trique de mat\u00e9riau pour r\u00e9aliser la transition (r\u00e9versible) entre les phases amorphes et cristallines. L\u2019information est donc stock\u00e9e et lue en mesurant la r\u00e9sistance \u00e9lectrique de cette zone, le \u00ab\u00a0point m\u00e9moire\u00a0\u00bb.<\/p>\n<p><strong><span style=\"color: #ff7b00;\"><span style=\"color: #008080;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-2-e5f5491c2fbb93073bef6f4707a95368\">\n.av_font_icon.av-mqde7m-2-e5f5491c2fbb93073bef6f4707a95368{\ncolor:#991f0f;\nborder-color:#991f0f;\n}\n.av_font_icon.av-mqde7m-2-e5f5491c2fbb93073bef6f4707a95368 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-2-e5f5491c2fbb93073bef6f4707a95368 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue857' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/span><\/span><\/strong>Cette technologie, d\u00e9j\u00e0 utilis\u00e9e dans l\u2019\u00e9lectronique automobile par exemple, implique des d\u00e9fis consid\u00e9rables en termes d\u2019ing\u00e9nierie de mat\u00e9riaux car localement le point m\u00e9moire atteint des temp\u00e9ratures sup\u00e9rieures \u00e0 600\u00b0C lors de la fusion. R\u00e9ussir \u00e0 confiner un tel d\u00e9gagement de chaleur sur une zone de quelques nanom\u00e8tres et sur une dur\u00e9e inf\u00e9rieure \u00e0 une microseconde n\u00e9cessite de conna\u00eetre les propri\u00e9t\u00e9s, en particulier thermiques, du mat\u00e9riau en fonction de la temp\u00e9rature. Par ailleurs, la composition du mat\u00e9riau est d\u2019une grande complexit\u00e9 et ses propri\u00e9t\u00e9s ne sont pas toujours connues pr\u00e9cis\u00e9ment.<\/p>\n<\/div><\/section><\/div>\n<div  class='flex_column av-10k23my-479b76c6fc5583d52caf1f8edef4b538 av_two_fifth  avia-builder-el-10  el_after_av_two_fifth  el_before_av_one_full  flex_column_div'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-w4ush6-636bcff097d0170adb89518aa0499588\">\n#top .av_textblock_section.av-w4ush6-636bcff097d0170adb89518aa0499588 .avia_textblock{\ntext-align:justify;\n}\n<\/style>\n<section  class='av_textblock_section av-w4ush6-636bcff097d0170adb89518aa0499588'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p><strong><span style=\"color: #ff7b00;\"><span style=\"color: #008080;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-1-8d1f54c507518a6285e604bf266568af\">\n.av_font_icon.av-mqde7m-1-8d1f54c507518a6285e604bf266568af{\ncolor:#991f0f;\nborder-color:#991f0f;\n}\n.av_font_icon.av-mqde7m-1-8d1f54c507518a6285e604bf266568af .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-1-8d1f54c507518a6285e604bf266568af avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue857' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/span><\/span><\/strong>En utilisant la m\u00e9thode de thermom\u00e9trie Raman, nous avons pu mesurer, en fonction de la temp\u00e9rature et de son \u00e9tat de cristallisation, la conductivit\u00e9 thermique du GeSbTe. La m\u00e9thode utilise la mesure du spectre de diffusion Raman, v\u00e9ritable empreinte digitale du mat\u00e9riau qui r\u00e9v\u00e8le des informations sur sa composition et sa phase. Certains pics de diffusion d\u00e9pendent de la temp\u00e9rature locale et constituent de v\u00e9ritables thermom\u00e8tres que nous pouvons calibrer pour mesurer, sans contact, avec un laser, l\u2019\u00e9chauffement du mat\u00e9riau. L\u2019analyse de cet \u00e9chauffement en fonction de la puissance du laser nous permet d\u2019en d\u00e9duire la conductivit\u00e9 thermique.<\/p>\n<p><strong><span style=\"color: #ff7b00;\"><span style=\"color: #008080;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-1-1-075884c2028750bba65b58595eb0da90\">\n.av_font_icon.av-mqde7m-1-1-075884c2028750bba65b58595eb0da90{\ncolor:#991f0f;\nborder-color:#991f0f;\n}\n.av_font_icon.av-mqde7m-1-1-075884c2028750bba65b58595eb0da90 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-1-1-075884c2028750bba65b58595eb0da90 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue889' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/span><\/span>La richesse de cette technique r\u00e9side dans le fait qu\u2019elle permet d\u2019obtenir des informations thermiques et structurales simultan\u00e9ment. Cette \u00e9tude, publi\u00e9e dans Journal of Applied Physics ouvre la voie \u00e0 l\u2019analyse de nombreux autres mat\u00e9riaux utiles pour les m\u00e9moires, les t\u00e9l\u00e9communications, l\u2019optique, les d\u00e9tecteurs et bien d\u2019autres applications.<\/strong><\/p>\n<hr \/>\n<p><strong><span style=\"color: #991f0f;\"><span style=\"color: #ff7b00;\"><span style=\"color: #008080;\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-2-1-155984a02432d325023e8dd302db13d2\">\n.av_font_icon.av-mqde7m-2-1-155984a02432d325023e8dd302db13d2{\ncolor:#991f0f;\nborder-color:#991f0f;\n}\n.av_font_icon.av-mqde7m-2-1-155984a02432d325023e8dd302db13d2 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-2-1-155984a02432d325023e8dd302db13d2 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue843' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/span><\/span>Reference :<\/span><\/strong><br \/>\n<strong><em>Thermal characterization of Ge-rich GST thin films for phase change memories by Raman thermometry.<\/em><\/strong><br \/>\n<em> Akash Patil, Yannick Le-Friec, Pascal Roussel, Yves Deblock, Simon Jeannot, Philippe Boivin, Emmanuel Dubois et Jean-Fran\u00e7ois Robillard<\/em><br \/>\n<em> Journal of Applied Physics 136, 175102 (2024).<\/em><br \/>\n<a href=\"https:\/\/doi.org\/10.1063\/5.0226265\" target=\"_blank\" rel=\"noopener\"><em> https:\/\/doi.org\/10.1063\/5.0226265<\/em><\/a><br \/>\n<a href=\"https:\/\/hal.science\/hal-04764747v1\" target=\"_blank\" rel=\"noopener\"><em>https:\/\/hal.science\/hal-04764747v1<\/em><\/a><\/p>\n<hr \/>\n<div  class='avia-button-wrap av-rpqvoq-430fa6c1ae3fe804e22b0967f19a80d0-wrap avia-button-center  avia-builder-el-15  el_after_av_font_icon  avia-builder-el-last'><a href='mailto:jean-francois.robillard@iemn.fr'  class='avia-button av-rpqvoq-430fa6c1ae3fe804e22b0967f19a80d0 av-link-btn avia-icon_select-yes-left-icon avia-size-light avia-position-center avia-color-red'   aria-label=\"Jean-Francois Robillard\"><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' >Jean-Francois Robillard<\/span><\/a><\/div>\n<\/div><\/section><\/div><div  class='flex_column av-ojtega-94d45140b8775cebff6905834cd01154 av_one_full  avia-builder-el-16  el_after_av_two_fifth  avia-builder-el-last  first flex_column_div'     ><\/div><\/p>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[297],"tags":[],"class_list":["post-72682","post","type-post","status-publish","format-standard","hentry","category-newsletter"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/72682","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=72682"}],"version-history":[{"count":1,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/72682\/revisions"}],"predecessor-version":[{"id":76469,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/72682\/revisions\/76469"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=72682"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=72682"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=72682"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}