{"id":27330,"date":"2024-06-21T15:31:23","date_gmt":"2024-06-21T07:31:23","guid":{"rendered":"\/phys\/?page_id=27330"},"modified":"2024-06-27T14:44:35","modified_gmt":"2024-06-27T06:44:35","slug":"neutron-powder-diffraction-study-of-the-helimagnet-ybacufeo5-with-b-site-disorder","status":"publish","type":"page","link":"\/phys\/?page_id=27330","title":{"rendered":"Neutron Powder Diffraction Study of the Helimagnet YBaCuFeO5 with B-site Disorder"},"content":{"rendered":"\n<p class=\"has-medium-font-size\">\u59d3\u540d\uff1a\u8cf4\u541b\u8c6a\uff0c\u6307\u5c0e\u6559\u6388\uff1a\u675c\u662d\u5b8f<\/p>\n\n\n\n<div class=\"wp-block-tkuwpbs5-bs5-container container\" style=\"position:relative\" block_id=\"lxobnzmlee7hkybzqi5\"><style><\/style>\n<div class=\"wp-block-tkuwpbs5-bs5-row row\">\n<div class=\"wp-block-tkuwpbs5-bs5-column col-md-6 align-self-start\">\n<div class=\"wp-block-stackable-image stk-block-image stk-block stk-c39d675\" data-block-id=\"c39d675\"><figure><span class=\"stk-img-wrapper stk-image--shape-stretch\"><img decoding=\"async\" loading=\"lazy\" class=\"stk-img wp-image-27350\" src=\"\/phys\/wp-content\/uploads\/2024\/06\/2024\u6de1\u6c5f\u7269\u7406\u6d77\u5831_\u8cf4\u541b\u8c6a-scaled.jpg\" width=\"1811\" height=\"2560\" srcset=\"\/phys\/wp-content\/uploads\/2024\/06\/2024\u6de1\u6c5f\u7269\u7406\u6d77\u5831_\u8cf4\u541b\u8c6a-scaled.jpg 1811w, \/phys\/wp-content\/uploads\/2024\/06\/2024\u6de1\u6c5f\u7269\u7406\u6d77\u5831_\u8cf4\u541b\u8c6a-212x300.jpg 212w, \/phys\/wp-content\/uploads\/2024\/06\/2024\u6de1\u6c5f\u7269\u7406\u6d77\u5831_\u8cf4\u541b\u8c6a-724x1024.jpg 724w, \/phys\/wp-content\/uploads\/2024\/06\/2024\u6de1\u6c5f\u7269\u7406\u6d77\u5831_\u8cf4\u541b\u8c6a-768x1086.jpg 768w, \/phys\/wp-content\/uploads\/2024\/06\/2024\u6de1\u6c5f\u7269\u7406\u6d77\u5831_\u8cf4\u541b\u8c6a-1087x1536.jpg 1087w, \/phys\/wp-content\/uploads\/2024\/06\/2024\u6de1\u6c5f\u7269\u7406\u6d77\u5831_\u8cf4\u541b\u8c6a-1449x2048.jpg 1449w\" sizes=\"(max-width: 1811px) 100vw, 1811px\" \/><\/span><\/figure><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-tkuwpbs5-bs5-column col-md-6 align-self-start\">\n<p><strong>Abstract<\/strong><\/p>\n\n\n\n<p>We report the tunable magnetic structures in the helimagnet YBa(Cu1-<em>x<\/em>Fe<em>x<\/em>)2O5 by changing various Cu\/Fe ratios. The magnetic properties and structures of the samples were studied by using neutron powder diffraction (NPD) and susceptibility measurements. The parent material YBaCuFeO5 exhibits two antiferromagnetic (AFM) transitions at <em>T<\/em>N1 ~ 450 K and <em>T<\/em>N2 ~ 175 K. At <em>T<\/em>N1, YBaCuFeO5 shows a commensurate spin ordering (CM1) with a <em>q<\/em>&#8211; wavevector <strong><em>kc<\/em>1 <\/strong>= (\u00bd \u00bd \u00bd ), which transfers to a spiral magnetic ordering at <em>T<\/em>N2 with an incommensurate (ICM) <em>q<\/em>-wavevector (\u00bd \u00bd \u00bd \u00b1<em>\u03b4<\/em>), <em>\u03b4 <\/em>being the incommensurability. Using neutron powder diffraction for samples with 0.490 \u2264 <em>x <\/em>\u2264 0.505, <em>T<\/em>N2 was observed to systematically increase from 125 to 236 K as a function of the Cu\/Fe ratio. For <em>x <\/em>= 0.510 and 0.515, additional magnetic reflections with a propagation vector <strong><em>kc<\/em>2 <\/strong>= (\u00bd \u00bd 0) appear below <em>T<\/em>N3 ~ 245 and 269 K, respectively. This new commensurate phase (CM2) shows a collinear magnetic ordering. These transition temperatures are consistent with the AFM transitions of the magnetization data. Experiments were also conducted to synthesize the samples with different thermal treatments, demonstrating the <em>T<\/em>N2 and <em>T<\/em>N3 to be sensitive to the annealing conditions. These results can be understood within the framework of the random distributions of the dopants\/impurities at the B-site of a double perovskite lattice and demonstrate the magnetic ordering in the helimagnet YBaCuFeO5 can be systematically tuned by changing the Cu\/Fe ratio.<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u59d3\u540d\uff1a\u8cf4\u541b\u8c6a\uff0c\u6307\u5c0e\u6559\u6388\uff1a\u675c\u662d\u5b8f<\/p>\n","protected":false},"author":10,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"wp-custom-template-detail-4-post","meta":{"_uag_custom_page_level_css":"","footnotes":""},"acf":[],"featured_image_urls":{"full":"","thumbnail":"","medium":"","medium_large":"","large":"","twp-icon":"","1536x1536":"","2048x2048":""},"post_excerpt_stackable":"<p>\u59d3\u540d\uff1a\u8cf4\u541b\u8c6a\uff0c\u6307\u5c0e\u6559\u6388\uff1a\u675c\u662d\u5b8f Abstract We report the tunable magnetic structures in the helimagnet YBa(Cu1-xFex)2O5 by changing various Cu\/Fe ratios. The magnetic properties and structures of the samples were studied by using neutron powder diffraction (NPD) and susceptibility measurements. The parent material YBaCuFeO5 exhibits two antiferromagnetic (AFM) transitions at TN1 ~ 450 K and TN2 ~ 175 K. At TN1, YBaCuFeO5 shows a commensurate spin ordering (CM1) with a q&#8211; wavevector kc1 = (\u00bd \u00bd \u00bd ), which transfers to a spiral magnetic ordering at TN2 with an incommensurate (ICM) q-wavevector (\u00bd \u00bd \u00bd \u00b1\u03b4), \u03b4 being the incommensurability. Using neutron powder diffraction&hellip;<\/p>\n","category_list":"","author_info":{"name":"\u9ec3\u9806\u8208","url":"\/phys\/?author=10"},"comments_num":"0 comments","uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"twp-icon":false,"1536x1536":false,"2048x2048":false},"uagb_author_info":{"display_name":"\u9ec3\u9806\u8208","author_link":"\/phys\/?author=10"},"uagb_comment_info":0,"uagb_excerpt":"\u59d3\u540d\uff1a\u8cf4\u541b\u8c6a\uff0c\u6307\u5c0e\u6559\u6388\uff1a\u675c\u662d\u5b8f","_links":{"self":[{"href":"\/phys\/index.php?rest_route=\/wp\/v2\/pages\/27330"}],"collection":[{"href":"\/phys\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"\/phys\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"\/phys\/index.php?rest_route=\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"\/phys\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=27330"}],"version-history":[{"count":2,"href":"\/phys\/index.php?rest_route=\/wp\/v2\/pages\/27330\/revisions"}],"predecessor-version":[{"id":27351,"href":"\/phys\/index.php?rest_route=\/wp\/v2\/pages\/27330\/revisions\/27351"}],"wp:attachment":[{"href":"\/phys\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=27330"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}