{"id":339,"date":"2024-09-15T20:19:28","date_gmt":"2024-09-15T18:19:28","guid":{"rendered":"https:\/\/personal.unizar.es\/evange\/?page_id=339"},"modified":"2024-09-29T13:54:11","modified_gmt":"2024-09-29T11:54:11","slug":"calorimetry-goes-nano","status":"publish","type":"page","link":"https:\/\/personal.unizar.es\/evange\/calorimetry-goes-nano\/","title":{"rendered":"Calorimetry goes nano"},"content":{"rendered":"\n<h1 class=\"wp-block-heading has-text-align-center\"><em><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Calorimetry goes nano<\/mark><\/em><\/h1>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Thermodynamic measurements give a great deal of information on fundamental properties, providing direct and quantifiable insight into, e.g. densities of state and phase transitions. Many interesting materials are obtained in the form of sub-microgram single-crystals, thin films or even grafted monolayers. The mass of these samples is extremely small and so is their heat capacity. Therefore, this makes conventional calorimeters unsuitable.<\/p>\n\n\n\n<p>Using micromachining technology, we fabricate and develop different types of <strong>membrane-based nanocalorimeters<\/strong>. They can be operated in either <strong>modulation (AC) calorimetry<\/strong> or <strong>relaxation calorimetry<\/strong>, over a broad range of temperatures and applied magnetic fields. We employ our devices for challenging studies on magnetic systems, including spin-crossover compounds and molecules for applications in quantum information and magnetic refrigeration on a chip.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1168\" height=\"452\" src=\"http:\/\/personal.unizar.es\/evange\/wp-content\/uploads\/2024\/09\/foto_nanocalor.jpg\" alt=\"\" class=\"wp-image-90\"\/><\/figure>\n\n\n\n<p>Top: Photograph of a calorimeter based on a Si (left) or Si<sub>3<\/sub>N<sub>4<\/sub> (right) membrane with a ca. 100 nanogram single-crystal of [Fe<sub>x<\/sub>M<sub>1-x<\/sub>(btr)<sub>2<\/sub>(NCS)<sub>2<\/sub>]\u00b7H<sub>2<\/sub>O (highlighted by the arrow). Sample is a courtesy of Kamel Boukheddaden.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1168\" height=\"452\" src=\"http:\/\/personal.unizar.es\/evange\/wp-content\/uploads\/2024\/09\/fig_nanocalor.jpg\" alt=\"\" class=\"wp-image-81\"\/><\/figure>\n\n\n\n<p>Top left: Temperature response of the calorimeter to a heat pulse. Blue line is the fit to an exponential relaxation. Top right: Experimental zero-field heat capacity. Data are collected with a homemade calorimeter, based on a Si<sub>3<\/sub>N<sub>4<\/sub> membrane, for a ca. 100 nanogram single-crystal of [Fe<sub>x<\/sub>M<sub>1-x<\/sub>(btr)<sub>2<\/sub>(NCS)<sub>2<\/sub>]\u00b7H<sub>2<\/sub>O. Sample is a courtesy of Kamel Boukheddaden.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1168\" height=\"452\" src=\"http:\/\/personal.unizar.es\/evange\/wp-content\/uploads\/2024\/09\/fig_nanocalor2.jpg\" alt=\"\" class=\"wp-image-82\"\/><\/figure>\n\n\n\n<p>Top left: Photograph of a calorimeter based on a Si<sub>3<\/sub>N<sub>4<\/sub> membrane with a ca. 5 nanogram single-crystal flake of FePS<sub>3<\/sub> (highlighted by dotted lines). Top right: Its experimental zero-field AC heat capacity that shows antiferromagnetic ordering (see the peak heat capacity in the inset). Sample is a courtesy of Samuel Ma\u00f1as.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">The team<\/h2>\n\n\n\n<p>Giulia Lorusso, Juan Jos\u00e9 Morales, Michel Castro, and Marco Evangelisti.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Calorimetry goes nano Thermodynamic measurements give a great deal of information on fundamental properties, providing direct and quantifiable insight into, e.g. densities of state and phase transitions. Many interesting materials are obtained in the form of sub-microgram single-crystals, thin films or even grafted monolayers. The mass of these samples is extremely small and so is<\/p>\n<div class=\"more-link\">\n\t\t\t\t <a href=\"https:\/\/personal.unizar.es\/evange\/calorimetry-goes-nano\/\" class=\"link-btn theme-btn\"><span>Read More <\/span> <i class=\"fa fa-caret-right\"><\/i><\/a>\n\t\t\t<\/div>\n","protected":false},"author":1,"featured_media":460,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-339","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/personal.unizar.es\/evange\/wp-json\/wp\/v2\/pages\/339","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/personal.unizar.es\/evange\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/personal.unizar.es\/evange\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/personal.unizar.es\/evange\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/personal.unizar.es\/evange\/wp-json\/wp\/v2\/comments?post=339"}],"version-history":[{"count":2,"href":"https:\/\/personal.unizar.es\/evange\/wp-json\/wp\/v2\/pages\/339\/revisions"}],"predecessor-version":[{"id":341,"href":"https:\/\/personal.unizar.es\/evange\/wp-json\/wp\/v2\/pages\/339\/revisions\/341"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/personal.unizar.es\/evange\/wp-json\/wp\/v2\/media\/460"}],"wp:attachment":[{"href":"https:\/\/personal.unizar.es\/evange\/wp-json\/wp\/v2\/media?parent=339"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}