title: Magnetic properties of crystalline and amorphous phase-change materials doped with 3d impurities.
abstract: First-principles study of the structural and magnetic properties of cubic and amorphous phase-change materials doped with 3d impurities. We find that Co- and Ni-doped Ge(2) Sb(2) Te(5)  is non-magnetic, whereas Cr- and Mn-doped Ge(2) Sb(2) Te(5)  is magnetic and exhibits a significant magnetic contrast between the two phases in the ferromagnetic configuration. These results are explained in terms of differences in local structure and hybridization of the impurity d-orbitals with the host states.
authors: Institute for Theoretical Solid State Physics and JARA, RWTH Aachen University, D-52056 Aachen, Germany.
authors: Wei
authors: W
authors: Zhang
authors: Ider
authors: I
authors: Ronneberger
authors: Yan
authors: Y
authors: Li
authors: Riccardo
authors: R
authors: Mazzarello
mesh_terms: D000965:Antimony / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry; D003035:Cobalt / Q000737:chemistry; D003460:Crystallization; D005857:Germanium / Q000737:chemistry*; D008280:Magnetics; D008345:Manganese / Q000737:chemistry; D008420:Manufactured Materials; D009532:Nickel / Q000737:chemistry; D044367:Phase Transition; D013691:Tellurium / Q000737:chemistry*
chemical_list: D005857:Germanium; D002857:Chromium; D003035:Cobalt; D008345:Manganese; D009532:Nickel; D000965:Antimony; D013691:Tellurium