The ferrimagnetic structure of Fe2Mo3O12: dependence of Fe–O–O–Fe supersuperexchange couplings on geometry
| Autor: | E. Muessig, Clemens Ritter, Helmut Ehrenberg, Thorsten Buhrmester, Kirill G. Bramnik, Hans Weitzel |
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| Rok vydání: | 2003 |
| Předmět: |
Materials science
Magnetic moment Magnetic structure Magnetic domain Neutron diffraction Condensed Matter Physics Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Crystallography Magnetization Nuclear magnetic resonance Ferrimagnetism Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Monoclinic crystal system |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 261:353-359 |
| ISSN: | 0304-8853 |
| Popis: | The magnetic structure of Fe 2 Mo 3 O 12 was determined by neutron powder diffraction and magnetization studies. The magnetic unit cell is identical with the monoclinic chemical one ( Z =8), and the magnetic space group is P2 1 /a. The magnetic moments are ferromagnetically aligned along the b -axis for each sublattice corresponding to each Fe-site. There are four different Fe-sites, and the magnetic moments are parallel within two of them, but antiparallel to those of the other two sublattices, so that a ferrimagnetic structure results. The dominant antiferromagnetic supersuperexchange couplings are those along Fe–O–O–Fe paths with the two bridging oxygens belonging to one [MoO 4 ]-tetrahedron and forming large Fe–O–O and O–O–Fe angles. |
| Databáze: | OpenAIRE |
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