YTTRIUM IRON GARNET FERRITE, MICROWAVE COMPONENT INCLUDING SAID FERRITE AND PROCESSES FOR MANUFACTURING SAID FERRITE AND SAID COMPONENT

The invention relates to an yttrium iron garnet ferrite for microwave components, characterized in that its general formula is YaTRbBicFedAleIn1CagCuhZriVjCokSiIO12±?, where: -1 = ? = 1; 3(a+b+c+d+e+f) + 2(g+h+i) + 4(i+l) +5j = 24 ± 2?; 1 = a = 3.5; 0 = b = 1.5; 0.1 = c = 1, preferably 0.65 = c = 1; 4 = d = 5; 0 = e = 1.5; 0 = f = 0.8; 0 = g = 1; 0.01 = h = 0.05; 0 = i = 0.2; 0 = j = 0.8; 0 = k = 0.5 and 0 = I = 0.5 and where TR is a rare earth preferably chosen from Gd, Dy, Ho or a mixture of rare earths. The invention also relates to processes for manufacturing such a ferrite and a microwave component including it, and to a microwave component thus obtained. Ferrite grenat d'Yttrium-Fer pour composants hyperfréquences, caractérisé en ce que sa formule générale est : Ya TRb Bic Fed Ale In1 Cag Cuh Zri Vj, Cok SiI, 012 ±? avec : * -1 = ? = 1 * 3(a+b+c+d+e+f) + 2(g+h+i) + 4(i+l) +5j = 24 ± 2? * 1 = a = 3,5 *0 = b = 1,5 * 0,1 = c =1, de préférence 0,65