Statics and dynamics of an incommensurate spin order in a geometrically frustrated antiferromagnet CdCr${}_2$O${}_4$

J. -H. Chung, M. Matsuda, S. -H. Lee +6

Using elastic and inelastic neutron scattering we show that a cubic spinel, CdCr${}_2$O${}_4$, undergoes an elongation along the c-axis ($c>a=b$) at its spin-Peierls-like phase tra…