Multiple lattice instabilities resolved by magnetic-field and disorder sensitivities in cubic paramagnetic phase of the orbital-degenerate frustrated spinel MgV${}_2$O${}_4$

Tadataka Watanabe, Takashi Ishikawa, Shigeo Hara +3

Ultrasound velocity measurements of the orbital-degenerate frustrated spinel MgV${}_2$O${}_4$ are performed in the high-purity single crystal which exhibits successive structural and a…