Abstract
We present evidence for possibly the highest magnetic ordering temperature in any compound without transition elements. Neutron powder diffraction measurements, at both time-of-flight and constant wavelength sources, were performed on two independently prepared powders. adopts a distorted perovskite structure with -type antiferromagnetic ordering and has a moment of per Tc cation at room temperature with an extraordinarily high Néel point close to . Electronic structure calculations reveal extensive mixing between the technetium states and oxygen states proximal to the Fermi level. This hybridization leads to a close relationship between magnetic ordering temperature and moment formation in .
- Received 18 October 2010
DOI:https://doi.org/10.1103/PhysRevLett.106.067201
© 2011 American Physical Society
Synopsis
Magnetic order in a “hot” material
Published 7 February 2011
A strontium-based metal oxide with radioactive technetium exhibits the highest antiferromagnetic ordering temperature in a material without a third-row transition metal.
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