Stress and orientation in the relaxor/ferroelectric superlattices(PbMg1∕3Nb2∕3O3

Phase Diagram of BiFeO3/LaFeO3 Superlattices: Antiferroelectric‐Like State Stability Arising from Strain Effects and Symmetry Mismatch at Heterointerfaces

“…Using the Bragg formula for SLs we have calculated an average out-of-plane lattice parameter for each superlattice from the 2 value of the most intense satellite peak. [9][10][11][12][13][14][15] These results are presented in Figure 1 and show a linear decrease of the average out-of-plane lattice parameter with increasing x. Such gradual behaviour has also been observed for out-of-plane lattice parameter of Bi 1-x La x FeO 3 single films.…”

“…[8] According to this model competing distortion and octahedral tilt ordering (a such as superconductor/ferromagnetic, relaxor/ferroelectric and paraelectric/ferroelectric. [9][10][11][12][13][14][15][16] In particular polarization rotation has been observed along with a MPB in PbTiO 3 /CaTiO 3 superlattices. [16] In this work we have artificially introduced competition between R3c and structural behaviour that strongly depends on the composition and temperature.…”

“…Structural competition at the 5 interfaces is probed via the synthesis of superlattices with varying ratio of BFO and LFO in the period ((BiFeO 3 ) (1-x) /(LaFeO 3 ) x with =8-9nm kept fixed and x varying from 0.25 to 0.8 with a total of 25 bilayers). For instance the superlattice BFO 0.5 /LFO 0.5 shows the same ratio of BFO and LFO in the period (same thickness of about 4-4.5nm half the wavelength/periodicity ; similar notation/terminology were used in references [10][11][12][13][14][15]. The architectures of the two sets of SLs are given in the supporting information.…”

Effect of periodicity and composition in artificial BaTiO3/(Ba,Sr)TiO3superlattices

“…The ferroelectric soft mode is usually very sensitive to strain in thin films [11,18,19,[22][23][24] and so investigation of soft mode behavior in ferroelectric SLs is very useful for better understanding of their physical properties. modes.…”

Soft mode dynamics and the reduction ofTi4+disorder in ferroelectric∕relaxor superlatticesBaTiO3

“…14,15 The potential impact of SL's composed of relaxors is stimulated by strain effects, which can dramatically modify their physical properties. 16,17 Very recently we have reported 18 the first work on ferroelectric/ relaxor SL's consisting of alternating layers PT and PbMg 1/3 Nb 2/3 O 3 ͑PMN͒ for which a significant change in the vibrational behavior of the constituents was observed.…”