Ferroelectric, Electrooptic and Piezoelectric Properties of Nd₂Ti₂O₇Single Crystal

Microstructure and Nanoscale Piezoelectric/Ferroelectric Properties in La2Ti2O7 Thin Films Grown on (110)‐Oriented Doped Nb:SrTiO3 Substrates

“…Among the number of lead-free compounds already studied and developed, we can cite: simple and complex perovskite such as BaTiO 3 (BT), Ba 1Àx Sr x TiO 3 (BST), KNbO 3 (KN) and K 1Àx Na x NbO 3 (KNN), LiNbO 3 (LN) and NaBiO 3 (NB), [5][6][7] tungsten bronze oxides such as Sr 1Àx Ba x Nb 2 O 6 (SBN) and Ba 2 NaNb 5 O 15 (BNN), [8,9] bismuth layer-structured ferroelectrics (BLSF) such as SrBi 2 Nb 2 O 9 (SBiN) [10] and Bi 4 Ti 3 O 12 (BIT) [11] and A 2 B 2 O 7 layered perovskite structures such as Sr 2 Nb 2 O 7 (SNO) [12] and Nd 2 Ti 2 O 7 (NTO). [13] This list is not exhaustive. However, none of them presents performances comparable to PZT.…”

Electric and ferroelectric properties of a multilayer film of Nd₂Ti₂O₇ and Bi_3.25La_0.75Ti₃O₁₂ for use as a ferroelectric field effect transistor

“…10) At room temperature, NT is monoclinic with a P2 1 space group and exhibits a layered structure formed by infinite layers of strongly distorted TiO 6 octahedra.…”

Microstructure and local electrical behavior in [(Nd2Ti2O7)4/(SrTiO3)n]10 (n = 4–8) superlattices

“…The specic NTO oxide explored in this work crystallizes as a single-crystal in a perovskite-layered monoclinic structure with a P2 1 space group: a ¼ 7.68(2)Å, b ¼ 5.48(2)Å, c ¼ 13.02(3)Å and b ¼ 98 28 0 (5). 19 It also has a T c of 1482 AE 5 C, a spontaneous polarization (P s ) of 9 mC cm À2 , and a coercive eld (E c ) of 200 kV cm À1 at room temperature. 4,19 Recently, we successfully grew perovskite-layered ferroelectric NTO thin lms through both a sol-gel route and pulsed laser deposition (PLD) on SrTiO 3 (STO) substrates.…”

“…19 It also has a T c of 1482 AE 5 C, a spontaneous polarization (P s ) of 9 mC cm À2 , and a coercive eld (E c ) of 200 kV cm À1 at room temperature. 4,19 Recently, we successfully grew perovskite-layered ferroelectric NTO thin lms through both a sol-gel route and pulsed laser deposition (PLD) on SrTiO 3 (STO) substrates. 8,9,20 Furthermore, the introduction of insulating STO layers within ferroelectric layers to form articial superlattices has been shown to be promising for modulating the physical properties of thin lms.…”