Room-temperature shape-memory effect in Sr(Ni${}_{1-x}$Cu${}_x$)${}_2$P${}_2$

Juan Schmidt, Alexander J. Horvarth, Seok-Woo Lee +2

The compound SrNi${}_2$P${}_2$ can exhibit multiple crystal structures with no P-P pairs bonded (uncollapsed tetragonal, or ucT, state), with one-third of the P-P pairs bonded (one-thi…