Anisotropic strain, magnetic properties, and lattice dynamics in self-assembled multiferroic CoFe2O4-PbTiO3 nanostructures

Abstract

Articles you may be interested inAdjustable magnetoelectric effect of self-assembled vertical multiferroic nanocomposite films by the in-plane misfit strain and ferromagnetic volume fraction

Brillouin light scattering investigations of films and magnetic tunnel junctions with perpendicular magnetic anisotropy at the CoFeB–MgO interface

“…We found that the values of t DL and M s are in good agreement with previous studies [10,[28][29][30] and strongly depend on the layering structure of the samples and the annealing procedure they have undergone. For the as grown structures, the magnetic dead layer is found to be extremely thin in the bottom Ta/CoFeB/MgO samples (t as grown DL,bottom = 0.04 nm), while the magnetic dead layer is thicker in the top MgO/CoFe-B/Ta samples (t as grown DL,top = 0.25 nm).…”

Spin and phonon anomalies in epitaxial self-assembled CoFe2O4-BaTiO3 multiferroic nanostructures

“…For cubic CFO with the Fd 3m symmetry, the E g and pronounced A 1g modes are allowed at 300 cm À1 and 700 cm À1 , respectively, in the ZðXXÞ Z configuration. 7 According to the P 4mm symmetries for an a-domain oriented tetragonal BTO, the E(TO) modes are allowed in the ZðXYÞ Z geometry. 23,24 Since E(TO) mode appears at 310 cm À1 as shown in the inset of Fig.…”

“…Multiferroic materials simultaneously displaying ferroelectric and ferromagnetic materials have attracted research interests for the coupling between magnetic and electric orders. 1 Recently, much effort has been carried out to realize the stress-mediated coupling in multiferroic materials by applying the external electric fields 2-5 or magnetic fields 6,7 to generate large strain for manipulating the magnetic (or ferroelectric) properties. Because ferroelectric materials undergoing the structural transitions at their Curie temperatures can produce large strain to rotate the magnetic domains, temperature could be a new parameter to modify the interfacial coupling.…”

“…Our previous Raman study on artificial self-assembled nanostructures showed that the magnetostrictive CoFe 2 O 4 (CFO) rods can generate strain to enhance the polarization of ferroelectric matrix; 7 and X-ray absorption studies revealed an in-plane magnetic field applied on CFO rods can break the local charge symmetry of BTO matrix to create an inplane polarization. 6 However, how the structural transformations of BTO matrix influence on the magnetic properties of CFO nano-rods remains unknown.…”