Giant dielectric constant in Nd2NiO4+δ ceramics obtained by spark plasma sintering

Giant dielectric permittivity and electronic structure in (Al+Sb)co-doped TiO2 ceramics

“…The examples of giant-dielectric materials are CaCu 3 Ti 4 O 12 and related compounds [1][2][3][4][5][6][7][8], CuO [9], Ln 2Àx Sr x NiO 4 (Ln = Nd, La, Sm) [10][11][12][13], (M,N)-doped NiO systems (M = Li, Na, K and N = Ti, Al, Si, Ta) [14][15][16][17], AFe 1/2 B 1/2 O 3 (A = Ba, Sr, Ca; B = Nb, Ta, Sb) [18,19], and LuFe 2 O 4 [20] ceramics. Unfortunately, tand values of these materials are still larger than 0.04 at 1 kHz which is the standard value for capacitor applications.…”