Multiferroic BiFe1−xTMxO3/NiFe2O4 (TM = Mn, Cr) thin films: Structural, electrical and magnetic properties

Magnetoelectric fatigue of Ho-doped Bi5Ti3FeO15 films under the action of bipolar electrical cycling

“…For BTFO lms, before electric cycling, at low eld (below 30 kV cm À1 ), the slope is 1.09 at around 1, which is simply ohmic conduction. 16 When applied eld E > 30 kV cm À1 , there is another mechanism with a slope of 2.34, the so-called space-charge-limited conduction (SCLC) mechanism. 17 Aer being subjected to 2.0 Â 10 9 electric cycles, the tting slope values are close to 1 over the entire eld, which indicates that the leakage current conduction mechanisms agree well with the ohmic mechanism.…”

Impact of Structural Strain in Perovskite Epitaxial Thin Films on Their Functional Properties

“…A similar feature was reported for BFO films grown on LaAlO 3 (LAO) substrates (lattice constant of LAO ~3.80 Å) with the presence of a large compressive strain even for thicker films (118 nm) [50]. Series of thin films made of BFO, BiFeO 3 /NiFe 2 O 4 (BFO/NFO), BiFe 0.94 Mn 0.04 O 3 /NiFe 2 O 4 (BFMO/NFO) and BiFe 0.94 Mn 0.04 Cr 0.02 O 3 /NiFe 2 O 4 (BFMCO/NFO) were grown by sol-gel on FTO/glass substrates [51].…”

“…A massive structural distortion from rhombohedral to tetragonal phases is observed for BFMO/NFO and BFMCO/NFO samples, these samples having the highest structural stress because of the ion doping and the structural transformation. The highest ferroelectricity and the lowest leakage current density is observed for the same samples, meaning that the structural strain strongly affects their physicochemical properties [51]. BFO films with thicknesses ranging from 1 nm to 150 nm were deposited on STO substrates with a bottom layer of LSMO through PLD, and their structural and piezoelectric properties were studied in detail [52].…”