1983, is a novel technique to directly plate crystalline spinel
ferrite film with different compositions from an aqueous solution
at a temperature less than 90 °C.25 Conventional ferrite
film preparation methods such as sputtering, molecular
beam epitaxy, PLD, etc., require high temperatures well
above 600 °C, however, spin-spray technique can produce
high quality polycrystalline ferrite films at a low temperature
in between 25–90 °C. Several chemical reactions are involved
in ferrite spin-spray process, which consist of a adsorption
of Fe2+ and other ions Mn+ M=Fe, Co, Ni, Zn, etc.
on the substrate surface mediated by OH groups, b oxidization
process expressed by Fe2+→Fe3++e, and c ferrite film
formation accompanying with hydrolytic dissociation.26,27
Spin-spray deposited ferrites provide great opportunities for
low-temperature synthesized multiferroic composite materials
on ferroelectric substrates. Since new chemical bonds areformed during spin-spray process, strong adhesion between
the spin-spray deposited ferrite film and ferroelectric substrate
can be expected, which is critical for ME coupling.
Typical ferroelectric materials such as PbZr,TiO3 PZT
can be an excellent supplier of OH groups on its surface, thus
facilitating the formation of ferrite film on its surface through
spin-spray deposition. In addition, the good lattice match between
the perovskite PZT a=4.03 A and spinel ferrites
a=8.33 A may lead to excellent wetting between the ferrite
phase and PZT, thus, leading to strong interface bonding that
is important for achieving strong ME coupling.
1983, is a novel technique to directly plate crystalline spinel
ferrite film with different compositions from an aqueous solution
at a temperature less than 90 °C.25 Conventional ferrite
film preparation methods such as sputtering, molecular
beam epitaxy, PLD, etc., require high temperatures well
above 600 °C, however, spin-spray technique can produce
high quality polycrystalline ferrite films at a low temperature
in between 25–90 °C. Several chemical reactions are involved
in ferrite spin-spray process, which consist of a adsorption
of Fe2+ and other ions Mn+ M=Fe, Co, Ni, Zn, etc.
on the substrate surface mediated by OH groups, b oxidization
process expressed by Fe2+→Fe3++e, and c ferrite film
formation accompanying with hydrolytic dissociation.26,27
Spin-spray deposited ferrites provide great opportunities for
low-temperature synthesized multiferroic composite materials
on ferroelectric substrates. Since new chemical bonds areformed during spin-spray process, strong adhesion between
the spin-spray deposited ferrite film and ferroelectric substrate
can be expected, which is critical for ME coupling.
Typical ferroelectric materials such as PbZr,TiO3 PZT
can be an excellent supplier of OH groups on its surface, thus
facilitating the formation of ferrite film on its surface through
spin-spray deposition. In addition, the good lattice match between
the perovskite PZT a=4.03 A and spinel ferrites
a=8.33 A may lead to excellent wetting between the ferrite
phase and PZT, thus, leading to strong interface bonding that
is important for achieving strong ME coupling.
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