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However, weak spin\u2010orbit coupling and gentle exchange interaction restricted by the IQEs preclude a large magnetic anisotropic, remaining a challenge for a hard magnetism. It is reported that 2D [<jats:italic>Re<\/jats:italic><jats:sub>2<\/jats:sub>C]<jats:sup>2+<\/jats:sup>\u00b72e<jats:sup>\u2212<\/jats:sup> electrides (Re = Er, Ho, Dy, and Tb) show the permanent magnetism in a ferrimagnetic ground state, mimicking the ferrites composed of magnetic sublattices with different spin polarizations. Magnetic interaction between Re\u2010spin lattice and IQE\u2010spin lattice in the [<jats:italic>Re<\/jats:italic><jats:sub>2<\/jats:sub>C]<jats:sup>2+<\/jats:sup>\u00b72e<jats:sup>\u2212<\/jats:sup> electrides results in a large magnetocrystalline anisotropy and high coercivity, giving a maximum energy product of 15 MGOe. It is demonstrated that the spontaneous breaking of magnetic IQE\u2010sublattice through substitution with paramagnetic elements produces a crossover into an antiferromagnetic spin ordering of Re\u2010sublattice, implying that the magnetic sublattice of IQEs drives the permanent magnetism.<\/jats:p>","DOI":"10.1002\/adma.202412956","type":"journal-article","created":{"date-parts":[[2025,1,2]],"date-time":"2025-01-02T03:47:24Z","timestamp":1735789644000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Permanent Electride Magnets Induced by Quasi\u2010Atomic Non\u2010Nucleus\u2010Bound Electrons"],"prefix":"10.1002","volume":"37","author":[{"given":"Jeong Yun","family":"Hwang","sequence":"first","affiliation":[{"name":"Department of Materials Science and Engineering Yonsei University  Seoul 03722 Republic of Korea"},{"name":"KIURI Institute Yonsei University  Seoul 03722 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seung Yong","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering Yonsei University  Seoul 03722 Republic of Korea"},{"name":"KIURI Institute Yonsei University  Seoul 03722 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kimoon","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Physics Kunsan National University  Gunsan 54150 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Binod","family":"Regmi","sequence":"additional","affiliation":[{"name":"Department of Physics &amp; Astronomy and Center for Computational Sciences Mississippi State University  Mississippi States Mississippi 39762 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nahyun","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Energy Science Sungkyunkwan University  Suwon 16419 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dong Cheol","family":"Lim","sequence":"additional","affiliation":[{"name":"Department of Energy Science Sungkyunkwan University  Suwon 16419 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Heejeong","family":"Koo","sequence":"additional","affiliation":[{"name":"Department of Energy Science Sungkyunkwan University  Suwon 16419 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wooyoung","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering Yonsei University  Seoul 03722 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seong\u2010Gon","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Physics &amp; Astronomy and Center for Computational Sciences Mississippi State University  Mississippi States Mississippi 39762 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sung Wng","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Energy Science Sungkyunkwan University  Suwon 16419 Republic of Korea"},{"name":"Center for Innovative Electride Materials Sungkyunkwan University  Suwon 16419 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6843-6706","authenticated-orcid":false,"given":"Kyu Hyoung","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering Yonsei University  Seoul 03722 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,1,2]]},"reference":[{"key":"e_1_2_8_1_1","volume-title":"Modern Magnetic Materials: Principles and Applications","author":"O'handley R. 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