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- W2563900543 abstract "The quest for multiferroics with coexisting ferroic orders, such as ferroelectricity and (anti-)ferromagnetism, in a single phase continues to arouse interest by the promise of novel functions and technological device paradigms. However, the mutually exclusive mechanism of ferroelectricity and magnetism has limited the discovery and understanding of novel multiferroic materials. Here we demonstrate using the hybrid functional of Hartree-Fock and density-functional theories that an unusual interaction between oxygen vacancies and misfit (epitaxial) strains brings about local magnetic moments with different orders coexisting with the host ferroelectricity of nonmagnetic (NM) $mathrm{PbTi}{mathrm{O}}_{3}$ due to orbital symmetry breaking of the defect electronic states. The emerging magnetic spin moment exhibits rich local order transitions in response to switching the spontaneous polarization, i.e., magnetoelectric coupling. Individual oxygen vacancies therefore act as a source of ferroic-order parameters. The multiferroic and magnetoelectric properties exploited by engineering defects and strains provide an alternative route for multiferroics and will open a new avenue for multifunctional oxides that exhibit magnetism coexisting with host functionalities." @default.
- W2563900543 created "2017-01-06" @default.
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- W2563900543 date "2015-09-14" @default.
- W2563900543 modified "2023-10-17" @default.
- W2563900543 title "Defect-strain engineering for multiferroic and magnetoelectric properties in epitaxial (110) ferroelectric lead titanate" @default.
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- W2563900543 doi "https://doi.org/10.1103/physrevb.92.104106" @default.
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