Magnetic-field-induced electric polarization in multiferroic nanostructures

Physical Review Letters

Volumn 94, Issue 19, 2005, Pages

  Nan, Ce Wen ^a,b   Liu, Gang ^a,b   Lin, Yuanhua ^a,b   Chen, Haydn ^b  

^a TSINGHUA UNIVERSITY   (China)

^b CITY UNIVERSITY OF HONG KONG   (Hong Kong)

Author keywords

[No Author keywords available]

Indexed keywords

ELASTIC COUPLING INTERACTION; ELECTRIC POLARIZATION; MULTIFERROIC NANOSTRUCTURES;

COMPOSITE MATERIALS; FERROMAGNETIC MATERIALS; LAMINATES; MAGNETIC FIELD EFFECTS; NANOSTRUCTURED MATERIALS;

ELECTROMAGNETIC WAVE POLARIZATION;

EID: 27144496105     PISSN: 00319007     EISSN: 10797114     Source Type: Journal    
DOI: 10.1103/PhysRevLett.94.197203     Document Type: Article

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28. The properties of BaTiO3 and CoFe2O4 used in the numerical calculations were given as (c11p,c12p,c13p,c33p)=(166.2,76.5,77.4,161.4)GPa, κ33p/κo=1350, (e31p,e33p)=(-4.22,18.6)C/m2, and Ps3=26μC/cm2 for BaTiO3, and (c11m,c12m,c13m,c33m)=(286.0,173.0,170.5,269.5)Gpa and κ33m/κo=10 for CoFe2O4. From Ref., the out-of-plane residual strains in the 1-3 nanostructured film were given as εs33p=-εs33m=0.8%, and the in-plane residual strains were determined as εs33p=-1% and εs33m=-1.89% from the lattice constant mismatches between BaTiO3 and the substrate and between CoFe2O4 and the substrate. In the 2-2 type film, however, there exists only the in-plain residual strains, and εs11p=-1% and εs11m=-1.6% estimated from the lattice constant mismatches.
29. The 1-3 and 2-2 type bulk composites of BaTiO3/CoFe2O4 are normal BaTiO3/CoFe2O4 ceramic composites, i.e., CoFe2O4 ceramic rods embedded in BaTiO3 ceramic matrix for the 1-3 type, and laminated BaTiO3 and CoFe2O4 ceramic layers for the 2-2 composite.