Discovery and Characterization of Antiferromagnetic UFe5As3.
Inorg Chem
; 63(10): 4566-4573, 2024 Mar 11.
Article
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| ID: mdl-38407051
ABSTRACT
This work presents a study on a new uranium iron arsenide UFe5As3. By implementing Bi-flux synthesis, we were able to grow mm-sized single crystals of this compound, which show twinning. UFe5As3 is one of only two known uranium iron arsenides. It adopts a monoclinic, UCr5P3-type crystal structure (space group P21/m, Pearson symbol mP18, a = 7.050(2) Å, b = 3.8582(9) Å, c = 9.634(1) Å, ß = 100.25(1)°). The magnetic susceptibility of UFe5As3 indicates it to be an antiferromagnet with TN = 47 K and µeff = 4.94 µB per formula unit, signaling that both U and Fe are likely magnetic in this material. The material appears to be anisotropic, with a small (likely ferromagnetic) spin reorientation transition around T = 29 K. The Sommerfeld coefficient γ0 = 135 mJ mol-1 K-2 suggests enhanced effective electron mass in UFe5As3, while electrical resistivity indicates metallic, Kondo-like behavior.
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Base de datos:
MEDLINE
Idioma:
En
Revista:
Inorg Chem
/
Inorg. chem
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Inorganic chemistry
Año:
2024
Tipo del documento:
Article
País de afiliación:
Alemania