https://doi.org/10.1351/goldbook.S05873
A magneto-elastic transition that occurs in quasi one-dimensional antiferromagnetic materials when the magnetic .
free energy
decrease due to the formation of singlet spin pairs outweighs the increase in lattice free energy
occurring as a result of the dimerization
of the regular array. Example: The transition in tetrathiafulvalenium bis(dithiolene)cuprate at