2005 Physical Review Publications Optical Study of Interactions in a $d$-Electron Kondo Lattice with Ferromagnetism July 19, 2005May 5, 2014 Kenneth Burch K. S. Burch, A. Schafgans, N. P. Butch, T. A. Sayles, M. B. Maple, B. C. Sales, D. Mandrus, D. N. Basov. Optical Study of Interactions in a $d$-Electron Kondo Lattice with Ferromagnetism Phys. Rev. Lett. 95, 046401 (2005)