Long-range ferromagnetic order in LaCoO3-delta epitaxial films due to the interplay of epitaxial strain and oxygen vacancy ordering
| dc.contributor.author | Mehta, V. V. | |
| dc.contributor.author | Biskup Zaja, Nevenko | |
| dc.contributor.author | Jenkins, C. | |
| dc.contributor.author | Arenholz, E. | |
| dc.contributor.author | Varela Del Arco, María | |
| dc.contributor.author | Suzuki, Y. | |
| dc.date.accessioned | 2023-06-18T06:45:14Z | |
| dc.date.available | 2023-06-18T06:45:14Z | |
| dc.date.issued | 2015-04-23 | |
| dc.description | © 2015 American Physical Society. We thank Kin Man Yu for help with RBS as well as Juan Salafranca, Marco Liberati, Rajesh Chopdekar, Joanna Bettinger, Franklin Wong, Jodi Iwata-Harms, and Chunyong He. Research at UC Berkeley/LBNL and Stanford was supported by the U.S. Department of Energy, Director, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Contracts No. DE-AC02-05CH11231 (Berkeley and LBNL) and No. DESC0008505 (Stanford). STEM/EELS research at ORNL (M.V.) was supported by the U.S. Department of Energy, Director, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering and through a user project supported by ORNL’s Center for Nanophase Materials Sciences (CNMS), which is sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. STEM/EELS research at UCM (N.B.) was supported by the ERC starting Investigator Award, Grant No. 239739 STEMOX and Fundación Caja de Madrid. | |
| dc.description.abstract | We demonstrate that a combination of electronic structure modification and oxygen vacancy ordering can stabilize a long-range ferromagnetic ground state in epitaxial LaCoO_(3) thin films. Highest saturation magnetization values are found in the thin films in tension on SrTiO_(3) and (La,Sr)(Al,Ta)O_(3) substrates and the lowest values are found in thin films in compression on LaAlO_(3). Electron microscopy reveals oxygen vacancy ordering to varying degrees in all samples, although samples with the highest magnetization are the most defective. Element-specific x-ray absorption techniques reveal the presence of high spin Co^(2+) and Co^(3+) as well as low spin Co^(3+) in different proportions depending on the strain state. The interactions among the high spin Co ions and the oxygen vacancy superstructure are correlated with the stabilization of the long-range ferromagnetic order. | |
| dc.description.department | Depto. de Estructura de la Materia, Física Térmica y Electrónica | |
| dc.description.faculty | Fac. de Ciencias Físicas | |
| dc.description.refereed | TRUE | |
| dc.description.sponsorship | U.S. Department of Energy, Director, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering | |
| dc.description.sponsorship | ORNL’s Center for Nanophase Materials Sciences (CNMS) | |
| dc.description.sponsorship | Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy | |
| dc.description.sponsorship | ERC starting Investigator Award | |
| dc.description.sponsorship | Fundación Caja de Madrid | |
| dc.description.status | pub | |
| dc.eprint.id | https://eprints.ucm.es/id/eprint/30740 | |
| dc.identifier.doi | 10.1103/PhysRevB.91.144418 | |
| dc.identifier.issn | 1098-0121 | |
| dc.identifier.officialurl | http://dx.doi.org/10.1103/PhysRevB.91.144418 | |
| dc.identifier.relatedurl | http://journals.aps.org/ | |
| dc.identifier.uri | https://hdl.handle.net/20.500.14352/24036 | |
| dc.issue.number | 14 | |
| dc.journal.title | Physical review B | |
| dc.language.iso | eng | |
| dc.publisher | American Physical Society | |
| dc.relation.projectID | DE-AC02-05CH11231 | |
| dc.relation.projectID | DESC0008505 | |
| dc.relation.projectID | 239739 STEMOX | |
| dc.rights.accessRights | open access | |
| dc.subject.cdu | 537 | |
| dc.subject.keyword | Thin-films | |
| dc.subject.keyword | Domains. | |
| dc.subject.ucm | Electricidad | |
| dc.subject.ucm | Electrónica (Física) | |
| dc.subject.unesco | 2202.03 Electricidad | |
| dc.title | Long-range ferromagnetic order in LaCoO3-delta epitaxial films due to the interplay of epitaxial strain and oxygen vacancy ordering | |
| dc.type | journal article | |
| dc.volume.number | 91 | |
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