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Route to achieving giant magnetoelectric coupling in BaTiO3/Sr-2 CoO3F perovskite heterostructures
Natl Inst Technol Karnataka, Dept Phys, Mangalore 575025, India.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.ORCID iD: 0000-0002-9069-2631
Natl Inst Technol Karnataka, Dept Phys, Mangalore 575025, India.
2018 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 98, no 14, article id 140401Article in journal (Refereed) Published
Abstract [en]

Polarization-induced spin switching of atoms in magnetic materials opens the possibilities to design and develop advanced spintronic devices, in particular, storage devices where the magnetic state can be controlled by an electric field. We employ density functional theory calculations to study the magnetic properties of a perovskite strontium cobalt oxyfluoride Sr2CoO3F (SCOF) in a hybrid perovskite heterostructure, where SCOF is sandwiched between two ferroelectic BaTiO3 (BTO) layers. Our calculations show that the spin state of the central Co atom in SCOF can be controlled by altering the polarization direction of the BTO, specifically, to switch from a high-spin state to a low-spin state by changing the relative orientation of the ferroelectric polarization of BTO with respect to SCOF, leading to an unexpected, giant magnetoelectric coupling, alpha(s) approximate to 21 x 10(-10) Gcm(2)/V.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2018. Vol. 98, no 14, article id 140401
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-368097DOI: 10.1103/PhysRevB.98.140401ISI: 000446135500001OAI: oai:DiVA.org:uu-368097DiVA, id: diva2:1267649
Funder
Swedish Research CouncilAvailable from: 2018-12-03 Created: 2018-12-03 Last updated: 2018-12-03Bibliographically approved

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Oppeneer, Peter M.

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