Low energy spin wave excitations in bilayered magnetic manganite La${}_{2-2x}$Sr${}_{1+2x}$Mn${}_2$O${}_7$ ($0.30\le x\le 0.50$)

H. Martinho, C. Rettori, D. L. Huber +2

We have studied the low-temperature behavior of the magnetization and the specific heat of the bilayered perovskite system , for $0.30\leq x\leq 0.…