Highly insulating ferromagnetic cobaltite heterostructures

Choi, Woo Seok; Kang, Kyeong Tae; Jeen, Hyoungjeen; Gai, Zheng; Lee, Ho Nyung

doi:10.1016/j.cap.2017.02.013

Title: Highly insulating ferromagnetic cobaltite heterostructures

Journal Article · Sun Apr 02 00:00:00 EDT 2017 · Current Applied Physics

DOI:https://doi.org/10.1016/j.cap.2017.02.013· OSTI ID:1351778

Choi, Woo Seok ^[1]; Kang, Kyeong Tae ^[2]; Jeen, Hyoungjeen ^[3]; Gai, Zheng ^[4]; Lee, Ho Nyung ^[4]

Sungkyunkwan Univ., Suwon (South Korea); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sungkyunkwan Univ., Suwon (South Korea)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Pusan National Univ., Busan (South Korea)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Ferromagnetic insulators are rather rare but possess great technological potential in, for example, spintronics. Individual control of ferromagnetic properties and electronic transport provides a useful design concept of multifunctional oxide heterostructures. We studied the close correlation among the magnetism, atomic structure, and electronic structure of oxide heterostructures composed of the ferromagnetic perovskite LaCoO₃ and the antiferromagnetic brownmillerite SrCoO_2.5 epitaxial thin film layers. By reversing the stacking sequence of the two layers, we could individually modify the electric resistance and saturation magnetic moment. Lastly, the ferromagnetic insulating behavior in the heterostructures was understood in terms of the electronic reconstruction at the oxide surface/interfaces and crystalline quality of the constituent layers.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1351778

Alternate ID(s):: OSTI ID: 1415493

Journal Information:: Current Applied Physics, Vol. 17, Issue 5; ISSN 1567-1739

Publisher:: Korean Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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References (35)

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${(LaCo O_{3})}_{n} / {(SrCo O_{2.5})}_{n}$ superlattices: Tunable ferromagnetic insulator Noh, S. J.; Ahn, G. H.; Seo, J. H. Physical Review B, Vol. 100, Issue 6 https://doi.org/10.1103/physrevb.100.064415	journal	August 2019

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