Materials Science Forum, Vol.373-3, 541-544, 2001
Giant red shift of absorption edge due to ferromagnetic order in La0.9Sr0.1MnO3
The absorption edge of the perovskite La0.9Sr0.1MnO3, determined using the diffuse reflection coefficient spectra, shifts by the giant amount 0.4 eV in the direction of lower energies as the temperature decreases from the Curie point (155 K) to 141 K.