title: Fe-site substitution effect on the structural and magnetic properties in SrFeO2.
abstract: We investigated the Fe-site substitution effect on the structural and magnetic properties of the infinite layer iron oxide Sr(Fe(1-x)M(x))O(2) (M = Co, Mn) using synchrotron X-ray diffraction, neutron diffraction, and (57)Fe 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 Fe(2+) 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.
authors: Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan.
authors: Liis
authors: L
authors: Seinberg
authors: Takafumi
authors: T
authors: Yamamoto
authors: Cédric
authors: C
authors: Tassel
authors: Yoji
authors: Y
authors: Kobayashi
authors: Naoaki
authors: N
authors: Hayashi
authors: Atsushi
authors: A
authors: Kitada
authors: Yuji
authors: Y
authors: Sumida
authors: Takashi
authors: T
authors: Watanabe
authors: Masakazu
authors: M
authors: Nishi
authors: Kenji
authors: K
authors: Ohoyama
authors: Kazuyoshi
authors: K
authors: Yoshimura
authors: Mikio
authors: M
authors: Takano
authors: Werner
authors: W
authors: Paulus
authors: Hiroshi
authors: H
authors: Kageyama