New non-linear crystals in the A2B2O7 series

Structural and dielectric/ferroelectric properties of (La1−xNdx)2Ti2O7 synthesized by sol–gel route

“…ferroelectric devices [9,26], photocatalysts [27], magnetoelectric emission [28], phosphors when doped with rare earth [29], and high temperature dielectric or piezoelectric devices [30,31]. In these studies, the reported substitution ratio of La 3 + for Nd 3 + is 0.4-0.6%, 10% or 50%.…”

Electronic structure of layered titanate Nd2Ti2O7

“…Thermal stability up to T$1400°C and low dielectric losses open the way for a wide use of NTO as a key component in the fabrication of microwave ceramics and nanocomposites [12][13][14][15][16][17][18][19][20][21][22]. High refractive indices n a = 2.15, n b = 2.27 and n c = 2.23 (k = 526.5 nm) and a reasonable level of nonlinear optical susceptibility were measured for NTO [4,[23][24][25]. NTO is a multiferroic and a magnetochiral effect has been observed recently in this compound [12,26,27].…”

Growth of nonlinear optical calcium pyroniobate crystal

“…This crystal has been initially discovered as a piezoelectric and electro-optic crystal operating at room temperature, and it is a member of the family of pyrochlore-type oxide compounds (A 2 B 2 O 7 ) [2][3][4][5][6]. Earlier, the Ca 2 Nb 2 O 7 crystal has been grown by the Bridgman method [7], but crystals of large size and sufficiently high optical quality have not been obtained to our knowledge.…”