Elastic softness of low-symmetry frustrated $A$Ti${}_2$O${}_5$ ($A$ = Co, Fe)

Tadataka Watanabe, Kazuya Takayanagi, Ray Nishimura +4

Orthorhombic pseudobrookites CoTi${}_2$O${}_5$ and FeTi${}_2$O${}_5$ have a low-symmetry crystal structure comprising magnetic Co${}^{2+}$/Fe${}^{2+}$ ions and nonmagnetic Ti${}^{4+}$ ions, wher…