We have performed magnetic susceptibility and electron diffraction measurements on impurity effect in a novel spin-Peierls system TiOBr, i.e. Ti1 - x Scx OBr. The impurity-induced antiferromagnetic long-range order found in Cu1 - x Znx GeO3 could not be observed in this system. A number of unpaired spins induced by the impurities can be explained by a simple model that one Sc impurity creates one S = frac(1, 2) spin up to the threshold concentration, xc ∼ 0.025. The induced impurity suppresses the spin-Peierls transition temperature, Tc 1 and the spin-Peierls phase disappears at xt ∼ 0.028, although the incommensurate state still persists above xt. Both values agree well with each other.
- Electron diffraction
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering