Sign of the superexchange coupling between next-nearest neighbors in EuO
The sign of the superexchange coupling J sub(2) between next-nearest neighboring Eu super(2+) magnetic moments in EuO is a matter subject to debate. We have obtained evidence that this coupling is of antiferromagnetic nature (J sub(2) < 0). EuO thin films grown at different temperatures suggest t...
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| Veröffentlicht in: | Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2012-12, Vol.86 (22), Article 224408 |
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| container_title | Physical review. B, Condensed matter and materials physics |
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| creator | Liu, Pan Santana, Juan A.Colón Dai, Qilin Wang, Xianjie Dowben, Peter A. Tang, Jinke |
| description | The sign of the superexchange coupling J sub(2) between next-nearest neighboring Eu super(2+) magnetic moments in EuO is a matter subject to debate. We have obtained evidence that this coupling is of antiferromagnetic nature (J sub(2) < 0). EuO thin films grown at different temperatures suggest that lattice expansion results in enhancement of T sub(C) as clearly observed in stoichiometric EuO films grown on CaF sub(2) substrates. Resonant photoemission spectroscopy provides compelling evidence of strong hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that strong superexchange may be mediated by oxygen, thus consistent with the observed antiferromagnetic behavior between the next-nearest neighboring Eu atoms via nearest neighbor oxygen in EuO. |
| doi_str_mv | 10.1103/PhysRevB.86.224408 |
| format | Article |
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We have obtained evidence that this coupling is of antiferromagnetic nature (J sub(2) < 0). EuO thin films grown at different temperatures suggest that lattice expansion results in enhancement of T sub(C) as clearly observed in stoichiometric EuO films grown on CaF sub(2) substrates. Resonant photoemission spectroscopy provides compelling evidence of strong hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that strong superexchange may be mediated by oxygen, thus consistent with the observed antiferromagnetic behavior between the next-nearest neighboring Eu atoms via nearest neighbor oxygen in EuO.</description><identifier>ISSN: 1098-0121</identifier><identifier>EISSN: 1550-235X</identifier><identifier>DOI: 10.1103/PhysRevB.86.224408</identifier><language>eng</language><publisher>United States: American Physical Society</publisher><subject>Antiferromagnetism ; Band spectra ; Bands ; Calcium fluoride ; Condensed matter ; Joining ; Lattices ; Thin films</subject><ispartof>Physical review. 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B, Condensed matter and materials physics</title><description>The sign of the superexchange coupling J sub(2) between next-nearest neighboring Eu super(2+) magnetic moments in EuO is a matter subject to debate. We have obtained evidence that this coupling is of antiferromagnetic nature (J sub(2) < 0). EuO thin films grown at different temperatures suggest that lattice expansion results in enhancement of T sub(C) as clearly observed in stoichiometric EuO films grown on CaF sub(2) substrates. Resonant photoemission spectroscopy provides compelling evidence of strong hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that strong superexchange may be mediated by oxygen, thus consistent with the observed antiferromagnetic behavior between the next-nearest neighboring Eu atoms via nearest neighbor oxygen in EuO.</description><subject>Antiferromagnetism</subject><subject>Band spectra</subject><subject>Bands</subject><subject>Calcium fluoride</subject><subject>Condensed matter</subject><subject>Joining</subject><subject>Lattices</subject><subject>Thin films</subject><issn>1098-0121</issn><issn>1550-235X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNo1kE1LxDAQhosouK7-AU_Bk5eukzRpmqMu6goLK36At5DGaRvpprVpdfffW6me5h14eJl5ouicwoJSSK4eq314wq-bRZYuGOMcsoNoRoWAmCXi7XDMoLIYKKPH0UkIHwCUK85m0erZlZ40BekrJGFoscOdrYwvkdhmaGvnS5Jj_43oicddH3s0HYZ-XFxZ5U0XiPPkdticRkeFqQOe_c159Hp3-7JcxevN_cPyeh1bTmUfZ4A8LagFC8ImaKwEZRXjaLhgKVD5LgExH39QMk2FNIJaWqRFZlSeW8OTeXQx9TahdzpY16OtbOM92l6PLpiAbIQuJ6jtms9hPFdvXbBY18ZjMwRNJYCSSiRiRNmE2q4JocNCt53bmm6vKfz2Jfrfrc5SPblNfgAUdm4d</recordid><startdate>20121210</startdate><enddate>20121210</enddate><creator>Liu, Pan</creator><creator>Santana, Juan A.Colón</creator><creator>Dai, Qilin</creator><creator>Wang, Xianjie</creator><creator>Dowben, Peter A.</creator><creator>Tang, Jinke</creator><general>American Physical Society</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>20121210</creationdate><title>Sign of the superexchange coupling between next-nearest neighbors in EuO</title><author>Liu, Pan ; Santana, Juan A.Colón ; Dai, Qilin ; Wang, Xianjie ; Dowben, Peter A. ; Tang, Jinke</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c417t-80e46f1c0c05c3eac709c924ea4526017d70eeb224976657a51c1f6f8a9bbca43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Antiferromagnetism</topic><topic>Band spectra</topic><topic>Bands</topic><topic>Calcium fluoride</topic><topic>Condensed matter</topic><topic>Joining</topic><topic>Lattices</topic><topic>Thin films</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Liu, Pan</creatorcontrib><creatorcontrib>Santana, Juan A.Colón</creatorcontrib><creatorcontrib>Dai, Qilin</creatorcontrib><creatorcontrib>Wang, Xianjie</creatorcontrib><creatorcontrib>Dowben, Peter A.</creatorcontrib><creatorcontrib>Tang, Jinke</creatorcontrib><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>Physical review. 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EuO thin films grown at different temperatures suggest that lattice expansion results in enhancement of T sub(C) as clearly observed in stoichiometric EuO films grown on CaF sub(2) substrates. Resonant photoemission spectroscopy provides compelling evidence of strong hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that strong superexchange may be mediated by oxygen, thus consistent with the observed antiferromagnetic behavior between the next-nearest neighboring Eu atoms via nearest neighbor oxygen in EuO.</abstract><cop>United States</cop><pub>American Physical Society</pub><doi>10.1103/PhysRevB.86.224408</doi><oa>free_for_read</oa></addata></record> |
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| source | American Physical Society Journals |
| subjects | Antiferromagnetism Band spectra Bands Calcium fluoride Condensed matter Joining Lattices Thin films |
| title | Sign of the superexchange coupling between next-nearest neighbors in EuO |
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