Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 문순재 | - |
dc.date.accessioned | 2020-08-26T06:33:52Z | - |
dc.date.available | 2020-08-26T06:33:52Z | - |
dc.date.issued | 2019-08 | - |
dc.identifier.citation | PHYSICAL REVIEW B, v. 100, no. 6, article no. 064415 | en_US |
dc.identifier.issn | 2469-9950 | - |
dc.identifier.issn | 2469-9969 | - |
dc.identifier.uri | https://journals.aps.org/prb/abstract/10.1103/PhysRevB.100.064415 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/152592 | - |
dc.description.abstract | Ferromagnetic insulators have great potential for spintronic applications. For such applications, it is essential to find materials with a robust and controllable ferromagnetic insulating phase. However, because ferromagnetism in functional transition-metal oxides is usually coupled to metallicity, ferromagnetic insulators are very rare and independent control of their magnetic and electrical properties is difficult. In this study, the electrical, magnetic, and optical properties of (LaCoO3)(n)/(SrCoO2.5)(n) superlattice films are investigated for the manipulation of the ferromagnetic insulating phase. While the superlattices remain insulating irrespective of the periodicity n, the electronic structure and magnetic state vary drastically. Superlattices with large periodicities n of 10 and 20 show a ferromagnetic transition at a critical temperature T-C of similar to 80 K. With decreasing periodicity and increasing interface density of the superlattices, system with n = 4 becomes almost nonmagnetic, while in systems with n = 2 and 1, a reentrant ferromagnetic phase is observed at T-C of similar to 180 and similar to 225 K, respectively. Optical spectroscopy reveals that the fine control of the magnetic ground state is achieved by the modified electronic structure associated with the spin-state transition. Our results suggest an important design principle to create and manipulate the ferromagnetic insulating properties of Co-based oxide thin films. | en_US |
dc.description.sponsorship | This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (Grants No. 2017R1A2B4009413 and No. 2019R1A2B5B02004546). The work on the sample synthesis and structural characterization was supported by the US Department of Energy (DOE), Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. The magnetic measurements were conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility. This work was supported by LG Yonam Foundation. | en_US |
dc.language.iso | en | en_US |
dc.publisher | AMER PHYSICAL SOC | en_US |
dc.title | (LaCoO3)˂it˃(n)˂/it˃/(SrCoO2.5)˂it˃(n)˂/it˃ superlattices: Tunable ferromagnetic insulator | en_US |
dc.type | Article | en_US |
dc.relation.no | 6 | - |
dc.relation.volume | 100 | - |
dc.identifier.doi | 10.1103/PhysRevB.100.064415 | - |
dc.relation.page | 1-7 | - |
dc.relation.journal | PHYSICAL REVIEW B | - |
dc.contributor.googleauthor | Noh, S. J. | - |
dc.contributor.googleauthor | Ahn, G. H. | - |
dc.contributor.googleauthor | Seo, J. H. | - |
dc.contributor.googleauthor | Gai, Zheng | - |
dc.contributor.googleauthor | Lee, Ho Nyung | - |
dc.contributor.googleauthor | Choi, Woo Seok | - |
dc.contributor.googleauthor | Moon, S. J. | - |
dc.relation.code | 2019002560 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF NATURAL SCIENCES[S] | - |
dc.sector.department | DEPARTMENT OF PHYSICS | - |
dc.identifier.pid | soonjmoon | - |
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