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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
Antiferromagnetic Arsenides U8Co42As25 and UCo3As2
Nazar Zaremba1, Mitja Krnel1, Yurii Prots1
1Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany.
Inorganic Chemistry
|July 11, 2026
Summary
Two new uranium cobalt arsenides, U8Co42As25 and UCo3As2, were synthesized. Both compounds exhibit antiferromagnetic ordering, with U8Co42As25 ordering at 26 K and UCo3As2 at 67 K.
Area of Science:
- Inorganic chemistry
- Condensed matter physics
- Materials science
Background:
- Uranium-based compounds are of significant interest.
- Arsenides represent a fascinating class of inorganic materials.
Purpose of the Study:
- To discover and characterize new uranium cobalt arsenides.
- To investigate the structural and magnetic properties of novel arsenide compounds.
Main Methods:
- Single crystalline synthesis.
- X-ray diffraction for structural determination.
- Magnetic susceptibility measurements to determine ordering temperatures.
Main Results:
- Discovery and synthesis of two new compounds: U8Co42As25 and UCo3As2.
- U8Co42As25 represents a new structure type (Y8Co41As25 type).
- UCo3As2 adopts the HoCo3P2 type structure.
- Both compounds exhibit antiferromagnetic ordering at distinct temperatures (26 K and 67 K, respectively).
Conclusions:
- The synthesis of novel uranium cobalt arsenides expands the known family of these materials.
- The identified structures and magnetic properties provide new insights into structure-property relationships in intermetallic compounds.
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