This title appears in the Scientific Report :
2023
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevB.107.104104 in citations.
Please use the identifier: http://dx.doi.org/10.34734/FZJ-2023-04627 in citations.
Monoclinic symmetry of the hcp-type ordered areas in bulk cobalt
Monoclinic symmetry of the hcp-type ordered areas in bulk cobalt
The gradual ferromagnetic spin reorientation in hexagonal close packed cobalt (hcp-Co) phase between 230 $^\circ$C and 330 $^\circ$C reported for a Co single crystal [Bertaut $\textit{et al.}$, Solid State Commun. $\textbf{1}$, 81 (1963)] suggests that this phase could not have a hexagonal symmetry....
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Personal Name(s): | Kozłowski, Paweł |
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Fabrykiewicz, Piotr / Sosnowska, Izabela / Fauth, François / Senyshyn, Anatoliy / Suard, Emmanuelle / Oleszak, Dariusz / Przeniosło, Radosław (Corresponding author) | |
Contributing Institute: |
JCNS-4; JCNS-4 Heinz Maier-Leibnitz Zentrum; MLZ Streumethoden; JCNS-2 JARA-FIT; JARA-FIT JCNS-FRM-II; JCNS-FRM-II |
Published in: | Physical review / B, 107 (2023) 10, S. 104104 |
Imprint: |
College Park, Maryland
Americal Physical Society
2023
|
DOI: |
10.1103/PhysRevB.107.104104 |
DOI: |
10.34734/FZJ-2023-04627 |
Document Type: |
Journal Article |
Research Program: |
Materials – Quantum, Complex and Functional Materials Jülich Centre for Neutron Research (JCNS) (FZJ) |
Subject (ZB): | |
Link: |
OpenAccess Restricted |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.34734/FZJ-2023-04627 in citations.
The gradual ferromagnetic spin reorientation in hexagonal close packed cobalt (hcp-Co) phase between 230 $^\circ$C and 330 $^\circ$C reported for a Co single crystal [Bertaut $\textit{et al.}$, Solid State Commun. $\textbf{1}$, 81 (1963)] suggests that this phase could not have a hexagonal symmetry. This hypothesis is verified positively by synchrotron radiation diffraction and neutron diffraction on polycrystalline powder cobalt. The analysis of diffraction data has been done by using a specific set of Bragg peaks, which are not sensitive to the stacking faults present in abundance in hcp-Co. The crystal structure of the hcp-type ordered areas of cobalt is described by the monoclinic symmetry with the magnetic space group $C2'/m'$. In this monoclinic crystal structure the former hexagonal $[001]$ axis is no longer perpendicular to the hexagonal layers. The hexagonal $[001]$ and $[010]$ axes make an angle equal $\alpha \approx 90.10(1)$ $^\circ$, while the angle between in-plane $[100]$ and $[010]$ axes equals $\gamma \approx 120.11(1)$ $^\circ$. The monoclinic symmetry provides an approximate description of the crystal structure of the stacking faulted hcp-Co areas coexisting with fcc-Co areas. |