Abstract
We investigated the Fe-site substitution effect on the structural and magnetic properties of the infinite layer iron oxide Sr(Fe1-xM x)O2 (M = Co, Mn) using synchrotron X-ray diffraction, neutron diffraction, and 57Fe Mössbauer spectroscopy. Both systems have a similar solubility limit of x ≈ 0.3, retaining the ideal infinite layer structure with a space group of P4/mmm. For the Fe-Co system, both in-plane and out-of-plane axes decrease linearly and only slightly with x, reflecting the ionic radius difference between Fe2+ and Co 2+. For the Fe-Mn system the lattice evolution also follows Vegard's law but is anisotropic: the in-plane axis increases, while the out-of-plane decreases prominently. The magnetic properties are little influenced by Co substitution. On the contrary, Mn substitution drastically destabilizes the G-type magnetic order, featured by a significant reduction and a large distribution of the hyperfine field in the Mössbauer spectra, which suggests the presence of magnetic frustration induced presumably by a ferromagnetic out-of-plane Mn-Fe interaction. © 2011 American Chemical Society.
Original language | English (US) |
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Pages (from-to) | 3988-3995 |
Number of pages | 8 |
Journal | Inorganic Chemistry |
Volume | 50 |
Issue number | 9 |
DOIs | |
State | Published - May 2 2011 |
Externally published | Yes |
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry