{"id":8369,"date":"2017-02-15T09:57:04","date_gmt":"2017-02-15T09:57:04","guid":{"rendered":"http:\/\/vps468643.ovh.net\/?p=8369"},"modified":"2017-02-15T09:57:04","modified_gmt":"2017-02-15T09:57:04","slug":"on-the-alpha-phase-of-ca2%e2%88%92xsrxmno4-and-extending-the-chemistry-of-sr7%e2%88%92ycaymn4o15-to-y1","status":"publish","type":"post","link":"https:\/\/senngroup.com\/on-the-alpha-phase-of-ca2%e2%88%92xsrxmno4-and-extending-the-chemistry-of-sr7%e2%88%92ycaymn4o15-to-y1\/","title":{"rendered":"On the \u201calpha-phase\u201d of Ca2\u2212xSrxMnO4 and extending the chemistry of Sr7\u2212yCayMn4O15 to y>1"},"content":{"rendered":"<p><a href=\"http:\/\/dx.doi.org\/10.1016\/j.jssc.2017.01.026\">Sarah Craddock, Mark S. Senn. Journal of Solid State Chemistry 248 (2017) 157\u2013163.<\/a><\/p>\n<p>There has been renewed interest in the Ruddlesden-Popper phase (n=2) of composition Can+1MnnO3 n+1 in the light of recent research that has highlighted the nature of the improper ferroelectric ground state, which arises due to the couplings between specific combinations of MnO6 octahedral rotations and tilts. A fruitful route to control these octahedral degrees of freedom, and hence such desired physical properties, is through chemical substitution on the A\u2013site cation i.e. Ca2\u2212xSrxMnO4 for n =1, and in light of this, we have reinvestigated the chemistry of this solid solution. Here we focus on a common impurity phase observed during this synthesis which has been termed the \u201calpha-phase\u201d in the literature. We show that this impurity phase is actually comprised mainly of a structure related to Sr7Mn4O15 but is found here with significantly higher Ca substitution than previously believed possible. Sr7Mn4O15 is an interesting structural type in its own right, but has been mainly overlooked to date, exhibiting interesting physics related to low dimensional magnetic ordering and dimer interactions, and we show here that the structural type is a likely candidate for exhibiting a multiferroic ground state. The prospect of being able to tune the lattice and the exchange interactions through further chemical substitution is likely to lead to a renewed interest in this material.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sarah Craddock, Mark S. Senn. Journal of Solid State Chemistry 248 (2017) 157\u2013163. There has been renewed interest in the Ruddlesden-Popper phase (n=2) of composition Can+1MnnO3 n+1 in the light<br \/><a href=\"https:\/\/senngroup.com\/on-the-alpha-phase-of-ca2%e2%88%92xsrxmno4-and-extending-the-chemistry-of-sr7%e2%88%92ycaymn4o15-to-y1\/\" class=\"more\">Read more<\/a><\/p>\n","protected":false},"author":5,"featured_media":8370,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[64],"tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>On the \u201calpha-phase\u201d of Ca2\u2212xSrxMnO4 and extending the chemistry of Sr7\u2212yCayMn4O15 to y&gt;1 - SENN GROUP<\/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:\/\/senngroup.com\/on-the-alpha-phase-of-ca2\u2212xsrxmno4-and-extending-the-chemistry-of-sr7\u2212ycaymn4o15-to-y1\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"On the \u201calpha-phase\u201d of Ca2\u2212xSrxMnO4 and extending the chemistry of Sr7\u2212yCayMn4O15 to y&gt;1 - SENN GROUP\" \/>\n<meta property=\"og:description\" content=\"Sarah Craddock, Mark S. Senn. Journal of Solid State Chemistry 248 (2017) 157\u2013163. There has been renewed interest in the Ruddlesden-Popper phase (n=2) of composition Can+1MnnO3 n+1 in the lightRead more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/senngroup.com\/on-the-alpha-phase-of-ca2\u2212xsrxmno4-and-extending-the-chemistry-of-sr7\u2212ycaymn4o15-to-y1\/\" \/>\n<meta property=\"og:site_name\" content=\"SENN GROUP\" \/>\n<meta property=\"article:published_time\" content=\"2017-02-15T09:57:04+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/senngroup.com\/wp-content\/uploads\/2017\/02\/Craddock_JSSC_2017.png\" \/>\n\t<meta property=\"og:image:width\" content=\"2490\" \/>\n\t<meta property=\"og:image:height\" content=\"1172\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Group\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Group\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/senngroup.com\/on-the-alpha-phase-of-ca2%e2%88%92xsrxmno4-and-extending-the-chemistry-of-sr7%e2%88%92ycaymn4o15-to-y1\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/senngroup.com\/on-the-alpha-phase-of-ca2%e2%88%92xsrxmno4-and-extending-the-chemistry-of-sr7%e2%88%92ycaymn4o15-to-y1\/\"},\"author\":{\"name\":\"Group\",\"@id\":\"https:\/\/senngroup.com\/#\/schema\/person\/2ed249a68be20ed65887a9155d15237a\"},\"headline\":\"On the \u201calpha-phase\u201d of Ca2\u2212xSrxMnO4 and extending the chemistry of Sr7\u2212yCayMn4O15 to y>1\",\"datePublished\":\"2017-02-15T09:57:04+00:00\",\"dateModified\":\"2017-02-15T09:57:04+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/senngroup.com\/on-the-alpha-phase-of-ca2%e2%88%92xsrxmno4-and-extending-the-chemistry-of-sr7%e2%88%92ycaymn4o15-to-y1\/\"},\"wordCount\":247,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/senngroup.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/senngroup.com\/on-the-alpha-phase-of-ca2%e2%88%92xsrxmno4-and-extending-the-chemistry-of-sr7%e2%88%92ycaymn4o15-to-y1\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/senngroup.com\/wp-content\/uploads\/2017\/02\/Craddock_JSSC_2017.png\",\"articleSection\":[\"Publications\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/senngroup.com\/on-the-alpha-phase-of-ca2%e2%88%92xsrxmno4-and-extending-the-chemistry-of-sr7%e2%88%92ycaymn4o15-to-y1\/\",\"url\":\"https:\/\/senngroup.com\/on-the-alpha-phase-of-ca2%e2%88%92xsrxmno4-and-extending-the-chemistry-of-sr7%e2%88%92ycaymn4o15-to-y1\/\",\"name\":\"On the \u201calpha-phase\u201d of Ca2\u2212xSrxMnO4 and extending the chemistry of Sr7\u2212yCayMn4O15 to y>1 - 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There has been renewed interest in the Ruddlesden-Popper phase (n=2) of composition Can+1MnnO3 n+1 in the lightRead more","og_url":"https:\/\/senngroup.com\/on-the-alpha-phase-of-ca2\u2212xsrxmno4-and-extending-the-chemistry-of-sr7\u2212ycaymn4o15-to-y1\/","og_site_name":"SENN GROUP","article_published_time":"2017-02-15T09:57:04+00:00","og_image":[{"width":2490,"height":1172,"url":"https:\/\/senngroup.com\/wp-content\/uploads\/2017\/02\/Craddock_JSSC_2017.png","type":"image\/png"}],"author":"Group","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Group","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/senngroup.com\/on-the-alpha-phase-of-ca2%e2%88%92xsrxmno4-and-extending-the-chemistry-of-sr7%e2%88%92ycaymn4o15-to-y1\/#article","isPartOf":{"@id":"https:\/\/senngroup.com\/on-the-alpha-phase-of-ca2%e2%88%92xsrxmno4-and-extending-the-chemistry-of-sr7%e2%88%92ycaymn4o15-to-y1\/"},"author":{"name":"Group","@id":"https:\/\/senngroup.com\/#\/schema\/person\/2ed249a68be20ed65887a9155d15237a"},"headline":"On the \u201calpha-phase\u201d of Ca2\u2212xSrxMnO4 and extending the chemistry of Sr7\u2212yCayMn4O15 to y>1","datePublished":"2017-02-15T09:57:04+00:00","dateModified":"2017-02-15T09:57:04+00:00","mainEntityOfPage":{"@id":"https:\/\/senngroup.com\/on-the-alpha-phase-of-ca2%e2%88%92xsrxmno4-and-extending-the-chemistry-of-sr7%e2%88%92ycaymn4o15-to-y1\/"},"wordCount":247,"commentCount":0,"publisher":{"@id":"https:\/\/senngroup.com\/#organization"},"image":{"@id":"https:\/\/senngroup.com\/on-the-alpha-phase-of-ca2%e2%88%92xsrxmno4-and-extending-the-chemistry-of-sr7%e2%88%92ycaymn4o15-to-y1\/#primaryimage"},"thumbnailUrl":"https:\/\/senngroup.com\/wp-content\/uploads\/2017\/02\/Craddock_JSSC_2017.png","articleSection":["Publications"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/senngroup.com\/on-the-alpha-phase-of-ca2%e2%88%92xsrxmno4-and-extending-the-chemistry-of-sr7%e2%88%92ycaymn4o15-to-y1\/","url":"https:\/\/senngroup.com\/on-the-alpha-phase-of-ca2%e2%88%92xsrxmno4-and-extending-the-chemistry-of-sr7%e2%88%92ycaymn4o15-to-y1\/","name":"On the \u201calpha-phase\u201d of Ca2\u2212xSrxMnO4 and extending the chemistry of Sr7\u2212yCayMn4O15 to y>1 - 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