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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

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Complex Microstructure and Magnetism in Polymorphic CaFeSeO.

Simon J Cassidy^1,2, Maria Batuk³, Dmitry Batuk³

¹Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford , South Parks Road, Oxford OX1 3QR, United Kingdom.

Inorganic Chemistry

|October 6, 2016

Summary

This summary is machine-generated.

The antiferromagnetic oxide selenide CaFeSeO exhibits complex structural and magnetic properties. Two distinct polymorphs were identified, influencing its magnetic ordering and spin canting behavior.

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Fabrication of Spatially Confined Complex Oxides

Fabrication of Spatially Confined Complex Oxides

Published on: July 1, 2013

Area of Science:

Solid-state chemistry
Materials science
Magnetism

Background:

CaFeSeO is an antiferromagnetic oxide selenide with potential for novel electronic properties.
Understanding its structural complexity is key to elucidating its magnetic behavior.

Purpose of the Study:

To describe the structural complexity of CaFeSeO.
To investigate the coexistence of two polymorphs and their influence on magnetic properties.

Main Methods:

X-ray diffraction for structural analysis.
Magnetic susceptibility measurements.
Neutron diffraction for magnetic structure determination.

Main Results:

Two polymorphs of CaFeSeO were identified, differing in layer arrangements.
Long-range antiferromagnetic order was observed below 159 K.
Spin canting in the noncentrosymmetric polymorph leads to weak ferromagnetism.

Conclusions:

The structural nuances of CaFeSeO dictate its complex magnetic interactions.
Cooperative tilting of FeSe2O2 tetrahedra leads to distinct polymorphs.
Spin canting and disordered regions contribute to the observed magnetic phenomena.