{"id":558,"date":"2023-10-03T15:14:44","date_gmt":"2023-10-03T19:14:44","guid":{"rendered":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/?p=558"},"modified":"2023-10-03T15:15:38","modified_gmt":"2023-10-03T19:15:38","slug":"surface-state-mediated-ferromagnetism-in-mn0-14bi1-86te3-thin-films","status":"publish","type":"post","link":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/surface-state-mediated-ferromagnetism-in-mn0-14bi1-86te3-thin-films\/","title":{"rendered":"Surface state mediated ferromagnetism in Mn0.14Bi1.86Te3 thin films"},"content":{"rendered":"<p><img fetchpriority=\"high\" decoding=\"async\" class=\" wp-image-559 aligncenter\" src=\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2023\/10\/Picture-4-300x205.png\" alt=\"\" width=\"423\" height=\"289\" srcset=\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2023\/10\/Picture-4-300x205.png 300w, https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2023\/10\/Picture-4.png 500w\" sizes=\"(max-width: 423px) 100vw, 423px\" \/><\/p>\n<p>A spontaneous ferromagnetic moment can be induced in Bi<sub>2<\/sub>Te<sub>3<\/sub>\u00a0thin films below a temperature\u00a0T\u224816 K by the introduction of Mn dopants. We demonstrate that films grown via molecular beam epitaxy with the stoichiometry Mn<sub>0.14<\/sub>Bi<sub>1.86<\/sub>Te<sub>3<\/sub> maintain the crystal structure of pure Bi<sub>2<\/sub>Te<sub>3<\/sub>. The van der Waals nature of inter-layer forces in the Mn<sub>0.14<\/sub>Bi<sub>1.86<\/sub>Te<sub>3<\/sub> crystal causes lattice mismatch with the underlayer to have a limited effect on the resulting crystal structure, as we demonstrate by thin film growth on tetragonal MgF2 and the antiferromagnet NiF2\u00a0(110). Magnetic heterostructures consisting of Mn<sub>0.14<\/sub>Bi<sub>1.86<\/sub>Te<sub>3<\/sub> grown on thin film antiferromagnetic NiF<sub>2<\/sub>\u00a0show magnetic behavior consistent with a coexistence of two decoupled magnetic layers. Electronic transport measurements in the Mn<sub>0.14<\/sub>Bi<sub>1.86<\/sub>Te<sub>3<\/sub> films exhibit the onset of the anomalous Hall effect at low temperatures. An inverse correlation between the magnitude of the anomalous Hall effect and the electron carrier density is observed in the samples. This correlation demonstrates that as the Fermi level is lowered and approaches the bulk band gap, the magnetic moment of the film increases, suggesting that topological surface states play a role in the development of ferromagnetism.<\/p>\n<p>This article was published in Physical Review Materials and is available <a href=\"https:\/\/journals.aps.org\/prmaterials\/abstract\/10.1103\/PhysRevMaterials.7.034201\">here<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A spontaneous ferromagnetic moment can be induced in Bi2Te3\u00a0thin films below a temperature\u00a0T\u224816 K by the introduction of Mn dopants. We demonstrate that films grown via molecular beam epitaxy with <a class=\"more-link\" href=\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/surface-state-mediated-ferromagnetism-in-mn0-14bi1-86te3-thin-films\/\">Continue Reading &rarr;<\/a><\/p>\n","protected":false},"author":84,"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-558","post","type-post","status-publish","format-standard","hentry","category-publications"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Surface state mediated ferromagnetism in Mn0.14Bi1.86Te3 thin 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\/surface-state-mediated-ferromagnetism-in-mn0-14bi1-86te3-thin-films\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Surface state mediated ferromagnetism in Mn0.14Bi1.86Te3 thin films -\" \/>\n<meta property=\"og:description\" content=\"A spontaneous ferromagnetic moment can be induced in Bi2Te3\u00a0thin films below a temperature\u00a0T\u224816 K by the introduction of Mn dopants. We demonstrate that films grown via molecular beam epitaxy with Continue Reading &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/surface-state-mediated-ferromagnetism-in-mn0-14bi1-86te3-thin-films\/\" \/>\n<meta property=\"article:published_time\" content=\"2023-10-03T19:14:44+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-10-03T19:15:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2023\/10\/Picture-4-300x205.png\" \/>\n<meta name=\"author\" content=\"Gregory Fritjofson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Gregory Fritjofson\" \/>\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\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/surface-state-mediated-ferromagnetism-in-mn0-14bi1-86te3-thin-films\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/surface-state-mediated-ferromagnetism-in-mn0-14bi1-86te3-thin-films\/\"},\"author\":{\"name\":\"Gregory Fritjofson\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/#\/schema\/person\/dfe9c061eec5b3ae750208f34e51ca90\"},\"headline\":\"Surface state mediated ferromagnetism in Mn0.14Bi1.86Te3 thin films\",\"datePublished\":\"2023-10-03T19:14:44+00:00\",\"dateModified\":\"2023-10-03T19:15:38+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/surface-state-mediated-ferromagnetism-in-mn0-14bi1-86te3-thin-films\/\"},\"wordCount\":214,\"image\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/surface-state-mediated-ferromagnetism-in-mn0-14bi1-86te3-thin-films\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2023\/10\/Picture-4-300x205.png\",\"articleSection\":[\"Publications\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/surface-state-mediated-ferromagnetism-in-mn0-14bi1-86te3-thin-films\/\",\"url\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/surface-state-mediated-ferromagnetism-in-mn0-14bi1-86te3-thin-films\/\",\"name\":\"Surface state mediated ferromagnetism in Mn0.14Bi1.86Te3 thin films -\",\"isPartOf\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/surface-state-mediated-ferromagnetism-in-mn0-14bi1-86te3-thin-films\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/surface-state-mediated-ferromagnetism-in-mn0-14bi1-86te3-thin-films\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2023\/10\/Picture-4-300x205.png\",\"datePublished\":\"2023-10-03T19:14:44+00:00\",\"dateModified\":\"2023-10-03T19:15:38+00:00\",\"author\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/#\/schema\/person\/dfe9c061eec5b3ae750208f34e51ca90\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/surface-state-mediated-ferromagnetism-in-mn0-14bi1-86te3-thin-films\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/surface-state-mediated-ferromagnetism-in-mn0-14bi1-86te3-thin-films\/#primaryimage\",\"url\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2023\/10\/Picture-4.png\",\"contentUrl\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2023\/10\/Picture-4.png\",\"width\":500,\"height\":342,\"caption\":\"Four graphs show magnetic properties of MBT films. Legend lists different substrates. Graphs (a) and (b) display resistivities vs. magnetic field. Graphs (c) and (d) show resistivity and field vs. carrier density.\"},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/#website\",\"url\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/\",\"name\":\"\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/#\/schema\/person\/dfe9c061eec5b3ae750208f34e51ca90\",\"name\":\"Gregory Fritjofson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/secure.gravatar.com\/avatar\/d69d9a6f73b3b6c0bcb07d2dccdb90a51eddff27039cbb9b8475a2c1fa28df07?s=96&d=mm&r=g\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/d69d9a6f73b3b6c0bcb07d2dccdb90a51eddff27039cbb9b8475a2c1fa28df07?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/d69d9a6f73b3b6c0bcb07d2dccdb90a51eddff27039cbb9b8475a2c1fa28df07?s=96&d=mm&r=g\",\"caption\":\"Gregory Fritjofson\"},\"url\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/author\/gr464854\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Surface state mediated ferromagnetism in Mn0.14Bi1.86Te3 thin films -","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/surface-state-mediated-ferromagnetism-in-mn0-14bi1-86te3-thin-films\/","og_locale":"en_US","og_type":"article","og_title":"Surface state mediated ferromagnetism in Mn0.14Bi1.86Te3 thin films -","og_description":"A spontaneous ferromagnetic moment can be induced in Bi2Te3\u00a0thin films below a temperature\u00a0T\u224816 K by the introduction of Mn dopants. 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Legend lists different substrates. Graphs (a) and (b) display resistivities vs. magnetic field. 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