INVESTIGATION OF THE DOUBLE-PHASE TRANSITION OF Tm3Fe5O12, BY EXAFS SPECTROSCOPY H. BEUTHIEN, D.v. AHLFTEN, W. GIRNUS, A. TORKLER, W. GUNSSER and W. NIEMANN J. Phys. Colloques, 47 C8 (1986) C8-733-C8-735 DOI: 10.1051/jphyscol:19868138