This title appears in the Scientific Report :
2023
Please use the identifier:
http://dx.doi.org/10.1016/j.jmmm.2023.170469 in citations.
Please use the identifier: http://dx.doi.org/10.34734/FZJ-2023-02556 in citations.
Magnetism and hyperfine interactions in the hexagonal polymorph of delafossite CuFeO 2
Magnetism and hyperfine interactions in the hexagonal polymorph of delafossite CuFeO 2
The magnetic susceptibility of and hyperfine interactions in the hexagonal 2H polymorph of delafossite CuFeO were investigated by SQUID magnetometry and Mössbauer spectroscopy, respectively, at low temperatures. The hydrothermally synthesized 2H-CuFeO sample contained a 10 vol-% -FeO impurity detect...
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Personal Name(s): | Klobes, Benedikt (Corresponding author) |
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Angst, Manuel / Fenske, Daniela / Konnur, Chinmay M. / Mahmoud, Abdelfattah / Sougrati, Moulay Tahar | |
Contributing Institute: |
Streumethoden; JCNS-2 JARA-FIT; JARA-FIT Streumethoden; PGI-4 |
Published in: | Journal of magnetism and magnetic materials, 570 (2023) S. 170469 - |
Imprint: |
Amsterdam
North-Holland Publ. Co.
2023
|
DOI: |
10.1016/j.jmmm.2023.170469 |
DOI: |
10.34734/FZJ-2023-02556 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) (FZJ) Materials – Quantum, Complex and Functional Materials |
Link: |
Published on 2023-01-28. Available in OpenAccess from 2025-01-28. |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.34734/FZJ-2023-02556 in citations.
The magnetic susceptibility of and hyperfine interactions in the hexagonal 2H polymorph of delafossite CuFeO were investigated by SQUID magnetometry and Mössbauer spectroscopy, respectively, at low temperatures. The hydrothermally synthesized 2H-CuFeO sample contained a 10 vol-% -FeO impurity detected by X-ray diffraction, whose contribution to the susceptibility and hyperfine interactions were easily distinguishable from the major 2H-CuFeO one. Morphology and indirect optical band gap investigated by scanning electron microscopy and diffuse reflectance measurements showed well expected results for a hydrothermally synthesized delafossite sample. The magnetic susceptibility of 2H-CuFeO revealed a first antiferromagnetic like transitions at 16 K and a second transition at 13.5 K or 10 K depending on measurement protocol, which points towards modified exchange interactions as compared to the 3R polymorph. Complementary Mössbauer measurements revealed complicated spectral shapes at low temperatures indicating rather complex magnetic structures and magnetic relaxations above 20 K. |