Ferromagnetism and Charge Order from a Frozen Electron Configuration in Strained Epitaxial LaCoO3

Sterbinsky, G. E.; Nanguneri, R.; Ma, J. X.; Shi, J.; Karapetrova, E.; Woicik, J. C.; Park, H.; Kim, J. -W.; Ryan, P. J.

doi:10.1103/PhysRevLett.120.197201

Title: Ferromagnetism and Charge Order from a Frozen Electron Configuration in Strained Epitaxial ${LaCoO}_{3}$

Journal Article · Tue May 08 00:00:00 EDT 2018 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.120.197201· OSTI ID:1460556

Sterbinsky, G. E. ^[1]; Nanguneri, R. ^[2]; Ma, J. X. ^[3]; Shi, J. ^[3]; Karapetrova, E. ^[1]; Woicik, J. C. ^[4]; Park, H. ^[5]; Kim, J. -W. ^[1]; Ryan, P. J. ^[6]

Argonne National Lab. (ANL), Argonne, IL (United States)
Univ. of Illinois at Chicago, Chicago, IL (United States)
Univ. of California, Riverside, CA (United States)
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Univ. of Illinois at Chicago, Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Dublin City Univ., Dublin (Ireland)

Here, we report ordering of the cobalt electron configuration in ferromagnetic strained epitaxial LaCoO₃. Specifically, the presence of charge order is demonstrated from distinct features of the resonant cobalt contribution to superstructure reflections. Density functional theory calculations show that the observed order is consistent with the spin-state periodicity predicted to give rise to ferromagnetism in LaCoO₃. Through the modification of symmetry by strain, concurrent frozen charge and spin-state order are stabilized, giving rise to long-range magnetic order.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-06CH11357; FG02-07ER46351

OSTI ID:: 1460556

Alternate ID(s):: OSTI ID: 1436388

Journal Information:: Physical Review Letters, Vol. 120, Issue 19; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 25 works

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