Exchange striction induced giant ferroelectric polarization in copper based multiferroic material $\alpha$-Cu${}_2$V${}_2$O${}_7$

J. Sannigrahi, S. Bhowal, S. Giri +2

We report $\alpha$-Cu${}_2$V${}_2$O${}_7$ to be an improper multiferroic with the simultaneous development of electric polarization and magnetization below $T_C$ = 35 K. The observed spontane…