Design of a polar half-metallic ferromagnet with accessible and enhanced electric polarization

Danilo Puggioni*, Alessandro Stroppa, James M. Rondinelli

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

We design a compound belonging to a class of materials designated as polar half-metallic ferromagnets, where a 100% spin polarization coexists with polar distortions that globally lift inversion symmetry. Using electronic structure calculations, we predict that the ultrashort period (LaNiO3)1/(YCrO3)1 superlattice belongs to this materials class, exhibiting an integer magnetic moment of 4μB. The minority channel electric polarization, as computed using Berry phase theory, is as high as ∼13.0μCcm-2, and we discuss experimental strategies to access the polarization. We propose that polar ferromagnetic half-metals exhibit multiferroism and can be exploited to realize nonreciprocal effects and directional anisotropy owing to the absence of both space-inversion and time-reversal symmetries.

Original languageEnglish (US)
Article number114403
JournalPhysical Review Materials
Volume2
Issue number11
DOIs
StatePublished - Nov 12 2018

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

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