{"id":314,"date":"2021-03-15T19:11:59","date_gmt":"2021-03-15T23:11:59","guid":{"rendered":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/?p=314"},"modified":"2021-09-03T13:38:52","modified_gmt":"2021-09-03T17:38:52","slug":"direct-imaging-of-electrical-switching-of-antiferromagnetic-neel-order-in-%ce%b1-fe2o3-epitaxial-films","status":"publish","type":"post","link":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/direct-imaging-of-electrical-switching-of-antiferromagnetic-neel-order-in-%ce%b1-fe2o3-epitaxial-films\/","title":{"rendered":"Direct imaging of electrical switching of antiferromagnetic N\u00e9el order in \u03b1-Fe2O3 epitaxial films"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"314\" class=\"elementor elementor-314\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-dee2e28 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"dee2e28\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-72890ba\" data-id=\"72890ba\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-64dbc09 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"64dbc09\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-1ac03a8\" data-id=\"1ac03a8\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6cdd98c elementor-widget elementor-widget-image\" data-id=\"6cdd98c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"672\" height=\"485\" src=\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2021\/09\/CaptureXMLD.jpg\" class=\"attachment-large size-large wp-image-315\" alt=\"This image shows a series of heat maps. Panel (a) displays states A and B under different pulse conditions. Panel (b) illustrates the differences between various states using a color scale.\" srcset=\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2021\/09\/CaptureXMLD.jpg 672w, https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2021\/09\/CaptureXMLD-300x217.jpg 300w\" sizes=\"(max-width: 672px) 100vw, 672px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-8894464 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8894464\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-149251d\" data-id=\"149251d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1ac65cc elementor-widget elementor-widget-text-editor\" data-id=\"1ac65cc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"color: #000000\">X rays have been used to image the spin directions in an antiferromagnetic thin film of hematite (\u03b1-Fe<sub>2<\/sub>O<sub>3<\/sub>) and show how they reorient in response to electrical pulses. Spin switching is shown to depend on the current direction and occurs even outside the current path. The results here show that, in addition to any direct interaction between the electrical current and the spins, thermal effects lead to spin reorientation, highlighting the delicate balance of interactions important to understanding the physics of current-induced switching in antiferromagnets.<\/span><\/p><p><span style=\"color: #000000\">Specifically, we reported the direct observation of switching of the N\u00e9el vector of antiferromagnetic (AFM) domains in response to electrical pulses in micron-scale Pt\/\u03b1\u2212Fe<sub>2<\/sub>O<sub>3<\/sub> Hall bars using photoemission electron microscopy. Current pulses lead to reversible and repeatable switching with the current direction determining the final state, consistent with Hall effect experiments that probe only the spatially averaged response. Current pulses also produce irreversible changes in domain structure, in and even outside the current path. In both cases only a fraction of the domains switch in response to pulses. Furthermore, the analysis of images taken with different x-ray polarizations shows that the AFM N\u00e9el order has an out-of-plane component in equilibrium that is important to consider in analyzing the switching data. These results show that\u2014in addition to effects associated with spin-orbit torques from the Pt layer, which can produce reversible switching\u2014changes in AFM order can be induced by purely thermal effects.<\/span><\/p><p><span style=\"color: #000000\"> This work has been published in PRB and can be accessed <a href=\"https:\/\/journals.aps.org\/prb\/abstract\/10.1103\/PhysRevB.103.L100405\">here<\/a>.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>X rays have been used to image the spin directions in an antiferromagnetic thin film of hematite (\u03b1-Fe2O3) and show how they reorient in response to electrical pulses. Spin switching <a class=\"more-link\" href=\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/direct-imaging-of-electrical-switching-of-antiferromagnetic-neel-order-in-%ce%b1-fe2o3-epitaxial-films\/\">Continue Reading &rarr;<\/a><\/p>\n","protected":false},"author":61,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[7],"tags":[],"class_list":["post-314","post","type-post","status-publish","format-standard","hentry","category-publications"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Direct imaging of electrical switching of antiferromagnetic N\u00e9el order in \u03b1-Fe2O3 epitaxial films -<\/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:\/\/sciences.ucf.edu\/physics\/afmspin\/direct-imaging-of-electrical-switching-of-antiferromagnetic-neel-order-in-\u03b1-fe2o3-epitaxial-films\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Direct imaging of electrical switching of antiferromagnetic N\u00e9el order in \u03b1-Fe2O3 epitaxial films -\" \/>\n<meta property=\"og:description\" content=\"X rays have been used to image the spin directions in an antiferromagnetic thin film of hematite (\u03b1-Fe2O3) and show how they reorient in response to electrical pulses. Spin switching Continue Reading &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/direct-imaging-of-electrical-switching-of-antiferromagnetic-neel-order-in-\u03b1-fe2o3-epitaxial-films\/\" \/>\n<meta property=\"article:published_time\" content=\"2021-03-15T23:11:59+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-09-03T17:38:52+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2021\/09\/CaptureXMLD.jpg\" \/>\n<meta name=\"author\" content=\"Gyan Khatri\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Gyan Khatri\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" 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