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Improved multiferroic behavior in [111]-oriented BiFeO3/BiAlO3 superlattice
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10.1063/1.4795847
/content/aip/journal/jap/113/12/10.1063/1.4795847
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/12/10.1063/1.4795847

Figures

Image of FIG. 1.
FIG. 1.

(a) Crystal structure of R3 BiFeO3/BiAlO3 (BFO/BAO) superlattice along [111] direction and (b) the illustration of its magnetic orderings. (c)The corner-sharing double-tetrahedron network in the rhombohedral phase provides a straightforward picture of ferroelectric distortions.

Image of FIG. 2.
FIG. 2.

Total density of states of (a) BFO, (b) BAO, and (c) BFO/BAO (only spin-up channel is shown), and the zero is set to the Fermi level.

Tables

Generic image for table
Table I.

Optimized structural parameters of ferroelectric phase of rhombohedral BFO and BAO. Experimental values are listed for comparison. The internal structural parameters refer to the Wyckoff positions 2a (x, x, x) for the cations and 6b (x, y, z) for the anions.

Generic image for table
Table II.

Strain dependence of the transition energy between antiferromagnetic and ferromagnetic (ΔE = E FME AFM, meV per BFO/BAO formula unit) including hydrostatic pressure and epitaxial strain in BFO/BAO.

Generic image for table
Table III.

Ferroelectric displacement (Δd), Born effective charge (BEC), and ferroelectric polarization (P) of BFO, BAO, and BFO/BAO superlattice. Δd represents the deviation of Fe/Al from the paraelectric structure (Δd = (d 1d 2)/2, definitions of d 1 and d 2 are shown in Fig. 1(c) ).

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/content/aip/journal/jap/113/12/10.1063/1.4795847
2013-03-25
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Improved multiferroic behavior in [111]-oriented BiFeO3/BiAlO3 superlattice
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/12/10.1063/1.4795847
10.1063/1.4795847
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