Half-metallic ferromagnetic nature of the double perovskite Pb2FeMoO6 from first-principle calculations |
| |
Authors: | Yan Zhang Vincent Ji |
| |
Affiliation: | ICMMO/LEMHE UMR CNRS 8182, Université Paris-Sud, 91405 Orsay Cedex, France |
| |
Abstract: | The structural, electronic and magnetic properties of the double perovskite Pb2FeMoO6 have been studied by using the first-principle projector augmented wave (PAW) potential within the generalized gradient approximation (GGA) as well as taking into account the on-site Coulomb repulsive interaction (GGA+U). Similar to Sr2FeMoO6 and Pb2FeReO6, the optimized crystal structure of Pb2FeMoO6 is a body-centered tetragonal (BCT) with the lattice constants a=b=5.60 Å and c=7.94 Å. The two axial TM?O distances are slightly larger than the four equatorial TM?O distances, which shows that the Jahn–Teller structural distortion exists in FeO6 and MoO6 octahedra. The half-metallic ferromagnetic nature implies a potential application of this new compound in spintronics devices. The Fe3+ and Mo5+ ions are in the states (3d5, S=5/2) and (4d1, S=1/2) with magnetic moments 3.87 and ?0.38μB respectively and thus there exists an antiferromagnetic coupling via oxygen between them. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|