{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T08:05:31Z","timestamp":1789632331117,"version":"build-2803163510"},"reference-count":49,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2025,12,26]],"date-time":"2025-12-26T00:00:00Z","timestamp":1766707200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2025,12,26]],"date-time":"2025-12-26T00:00:00Z","timestamp":1766707200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["advanced.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Advanced Materials"],"published-print":{"date-parts":[[2026,2]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    2D Van der Waals ferromagnet Fe\n                    <jats:sub>5\u2010x<\/jats:sub>\n                    GeTe\n                    <jats:sub>2<\/jats:sub>\n                    (F5GT) is promising for spintronic applications due to its high Curie temperature, layered structure, and ability to host complex magnetic textures. However, the origin of its sample\u2010dependent magnetic anisotropy remains unclear, hindering control of its magnetic behavior. Here, spatially resolved cryogenic scanning transmission electron microscopy (STEM) is used to correlatively map magnetism, lattice structure, and chemistry across atomic\u2010to\u2010micron scales. This is revealed that only mesoscale, not nanoscale, inclusions of a Fe\u2010deficient secondary phase significantly modify magnetic behavior, establishing a previously unrecognized critical length scale. This phase separation, induced by quenching, leads to in\u2010plane magnetic anisotropy, while slow cooling confines separation to a few nanometers and preserves out\u2010of\u2010plane anisotropy. These findings reconcile prior inconsistencies and establish a predictive framework for tuning magnetism in F5GT through thermal processing, with broader implications for controlling anisotropy in other 2D magnetic materials.\n                  <\/jats:p>","DOI":"10.1002\/adma.202515150","type":"journal-article","created":{"date-parts":[[2025,12,26]],"date-time":"2025-12-26T09:20:33Z","timestamp":1766740833000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Mesoscale Magnetostructural Phase Separation in Fe\u2010deficient Fe\n                    <sub>5<\/sub>\n                    GeTe\n                    <sub>2<\/sub>"],"prefix":"10.1002","volume":"38","author":[{"given":"Haoyang","family":"Ni","sequence":"first","affiliation":[{"name":"Department of Materials Science and Engineering University of Illinois at Urbana\u2010Champaign  Urbana Illinois 61801 USA"},{"name":"Center for Nanophase Materials Sciences Oak Ridge National Laboratory  Oak Ridge TN 37831 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eric R.","family":"Hoglund","sequence":"additional","affiliation":[{"name":"Center for Nanophase Materials Sciences Oak Ridge National Laboratory  Oak Ridge TN 37831 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jordan A.","family":"Hachtel","sequence":"additional","affiliation":[{"name":"Center for Nanophase Materials Sciences Oak Ridge National Laboratory  Oak Ridge TN 37831 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jian\u2010Min","family":"Zuo","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering University of Illinois at Urbana\u2010Champaign  Urbana Illinois 61801 USA"},{"name":"Monash Centre for Electron Microscopy Monash University  Clayton VIC 3800 Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lijun","family":"Wu","sequence":"additional","affiliation":[{"name":"Condensed Matter Physics and Materials Science Division Brookhaven National Laboratory  Upton NY 11973 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yimei","family":"Zhu","sequence":"additional","affiliation":[{"name":"Condensed Matter Physics and Materials Science Division Brookhaven National Laboratory  Upton NY 11973 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrew F.","family":"May","sequence":"additional","affiliation":[{"name":"Materials Science and Technology Division Oak Ridge National Laboratory  Oak Ridge Tennessee 37831 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0764-1567","authenticated-orcid":false,"given":"Miaofang","family":"Chi","sequence":"additional","affiliation":[{"name":"Center for Nanophase Materials Sciences Oak Ridge National Laboratory  Oak Ridge TN 37831 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,12,26]]},"reference":[{"key":"e_1_2_9_1_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41928-019-0360-9"},{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/zaac.201800456"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsnano.8b09660"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevMaterials.3.104401"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevMaterials.6.094404"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsami.2c18028"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1063\/5.0194813"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1063\/5.0213046"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1063\/5.0006337"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevMaterials.4.074008"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.nanolett.1c01108"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.102.064417"},{"key":"e_1_2_9_13_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.jpclett.2c00692"},{"key":"e_1_2_9_14_1","doi-asserted-by":"publisher","DOI":"10.1002\/adfm.202009758"},{"key":"e_1_2_9_15_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41524-023-01024-5"},{"key":"e_1_2_9_16_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.110.224401"},{"key":"e_1_2_9_17_1","doi-asserted-by":"publisher","DOI":"10.1038\/s42005-022-01031-w"},{"key":"e_1_2_9_18_1","first-page":"5335","volume":"18","author":"Gopi A. 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