Sr{sub 3}Mn{sub 2}O{sub 7}: Mn{sup 4+} parent compound of the n = 2 layered CMR manganites
- Argonne National Lab., IL (United States). Materials Science Div.
- Inst. Laue-Langevin, Grenoble (France)
The authors report the crystal and magnetic structures of the bilayer Ruddlesden-Popper phase Sr{sub 3}Mn{sub 2}O{sub 7{minus}{delta}} ({delta} = 0.0, 0.45). The {delta} = 0.45 compound exhibits a large number oxygen vacancies disordered in the MnO{sub 2} planes and is a nonmagnetic insulator. Sr{sub 3}Mn{sub 2}O{sub 7.0} ({delta} = 0) in an antiferromagnetic insulator whose magnetic structure is analogous to that of the related SrMnO{sub 3} perovskite. The stoichiometric layered material has a small distortion of its exclusively Mn{sup 4+}O{sub 6} octahedra as a result of steric influence of the surrounding cations. Thus, it provides a baseline for structural distortions related to electronic and/or magnetic transitions in doped materials.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 329163
- Journal Information:
- Journal of Solid State Chemistry, Vol. 141, Issue 2; Other Information: PBD: Dec 1998
- Country of Publication:
- United States
- Language:
- English
Similar Records
Layered manganites: Magnetic structure at extreme doping levels
The formation of the complex manganites LnSr{sub 2}Mn{sub 2}O{sub 7} (Ln = La, Nd, Gd)