Local order in ZnGeP2:Mn crystals

Abstract X‐ray absorption fine structure is investigated in ZnGeP 2 :Mn crystals at K‐edge of Zn, Ge and Mn. Both, the XANES and EXAFS results indicate that Mn atoms substitute on cationic sites in the chalcopyrite structure. It is, however, impossible to discriminate between Mn Zn and Mn Ge sites due to similar photo‐ electron scattering amplitudes of Zn and Ge atoms in the second coordination shell of Mn atom. The nearest‐neighbour distance Mn–P is up to 3% longer than the Zn–P bond length. The second‐ and third‐neighbour atoms were found to remain at distance close to the host lattice positions. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)