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Updated: Feb 7, 2026
08:45
Fabrication of Spatially Confined Complex Oxides
Published on: July 1, 2013
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Complex Magnetic Ordering in the Oxide Selenide Sr2Fe3Se2O3
Simon J Cassidy1, Fabio Orlandi2, Pascal Manuel2
1Department of Chemistry , University of Oxford, Inorganic Chemistry Laboratory , South Parks Road , Oxford OX1 3QR , United Kingdom.
Inorganic Chemistry
|August 1, 2018
Summary
This study reveals Sr2Fe3Se2O3, an iron oxide selenide with unique iron coordinations. It exhibits complex magnetic ordering transitions at distinct temperatures, showcasing intricate magnetic structures and moment reorientations.
Area of Science:
- Solid State Chemistry
- Materials Science
- Magnetism
Background:
- Sr2Fe3Se2O3 is an iron oxide selenide featuring two distinct Fe2+ coordinations forming 2:1 sublattices.
- The compound crystallizes in the Pbam space group at room temperature.
Purpose of the Study:
- To investigate the magnetic ordering and structural transitions in Sr2Fe3Se2O3.
- To characterize the complex magnetic structures and their evolution with temperature.
Main Methods:
- Magnetometry
- Neutron powder diffraction
- Mössbauer spectroscopy
Main Results:
- Two magnetic ordering transitions were observed at T_N1 = 118 K and T_N2 = 52 K.
- An incommensurate magnetic structure with propagation vector (1/2 - δ, 0, 1/2) forms below T_N1, transitioning to a commensurate structure at T_INC = 92 K.
- Ordering of Fe1 moments below T_N2 induces a reorientation of Fe2 moments, resulting in a complex magnetic structure at 1.5 K.
Conclusions:
- Sr2Fe3Se2O3 exhibits a multi-step magnetic ordering process with distinct commensurate and incommensurate phases.
- The interplay between the two Fe sublattices dictates the complex magnetic behavior of the material.
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