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Abstract
While exploring novel magnetic semiconductors, the new phase Cr0.65Al1.35Se3 was discovered and characterized by both structural and physical properties. Cr0.65Al1.35Se3 was found to crystallize into orthorhombic CrGeTe3-type structure with space group Pnma (no. 62). Vacancies and mixed occupancies were tested, and the results show that one of the 4c sites accommodates a mixture of Cr and Al atoms, while the other 4c site is fully occupied by Al atoms. Unique structural features include a T-shaped channel network created from the edge-sharing Cr/Al@Se6 and Al@Se4 polyhedra and a zipper effect of the puckered Se atoms inside the columnar channels. The round peak observed in the temperature-dependent magnetic susceptibility (χg) plot at ∼8(1) K corresponds to the antiferromagnetic-type transition in Cr0.65Al1.35Se3. However, the positive θCW indicates an additional ferromagnetic interaction, which is highly likely due to the complex magnetic structure arising from the mixed Cr/Al occupancies on the 4c site. Electrical resistivity measurements confirm that Cr0.65Al1.35Se3 is a semimetal with a positive magnetoresistance. Here we present the characterization and determination of the crystal structure and physical properties for this new material.
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Authors (7)
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Madalynn Marshall
-
Joanna Blawat
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Lingyi Xing
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Rongying Jin
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Weiwei Xie
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
INORGANIC CHEMISTRY
no. 58,
pages 13960 - 13968,
ISSN: 0020-1669 - Language:
- English
- Publication year:
- 2019
- Bibliographic description:
- Marshall M., Blawat J., Xing L., Winiarski M., Klimczuk T., Jin R., Xie W.: Low-Dimensional Magnetic Semimetal Cr0.65Al1.35Se3// INORGANIC CHEMISTRY -Vol. 58,iss. 20 (2019), s.13960-13968
- DOI:
- Digital Object Identifier (open in new tab) 10.1021/acs.inorgchem.9b01913
- Verified by:
- Gdańsk University of Technology
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