Kubitza, Niels ; Huck, Isabel ; Pazniak, Hanna ; Kalha, Curran ; Koch, David ; Zhao, Bo ; Thakur, Pardeep K. ; Lee, Tien-Lin ; Riaz, Aysha A. ; Donner, Wolfgang ; Zhang, Hongbin ; Moss, Benjamin ; Wiedwald, Ulf ; Regoutz, Anna ; Birkel, Christina S. (2024)
Between carbide and nitride MAX phases: sol–gel assisted synthesis and characterization of the carbonitride phase Cr₂GaC₁₋ₓNₓ.
In: Journal of Materials Chemistry C, 12 (21)
doi: 10.1039/D4TC00067F
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
MAX phases are almost exclusively known as carbides, while nitrides and carbonitrides form a significantly underrepresented subgroup even though they have been shown to possess enhanced properties in comparison to their carbide counterparts. One example is the nitride phase Cr₂GaN which exhibits a spin density wave magnetic state below T = 170 K, while the metallic carbide phase Cr₂GaC follows the MAX phase-typical Pauli-paramagnetic behavior. To investigate the influence on the materials/functional properties of mixing carbon and nitrogen on the X-site, this study aims to synthesize and comprehensively characterize the hitherto unknown carbonitride phase Cr₂GaC₁₋ₓNₓ and compare it to the parent phases. Due to the challenging synthesis of (carbo)nitrides in general, a sol–gel-assisted approach is applied which was recently developed by our group. This process was further improved by using time-efficient microwave heating, leading to a highly phase pure product. STEM-EDX analyses reveal a C/N ratio of roughly 2 : 1. Temperature-dependent XRD measurements confirm the literature-known magnetic phase transition of the parent nitride phase Cr₂GaN, while the incorporation of carbon suppresses the latter. Nonetheless, magnetic characterization of the phases reveals that the magnetic behavior can be specifically influenced by changing the composition of the X-site, resulting in an increase of the susceptibility by increasing the nitrogen amount. Overall, these findings further substantiate the big potential in nitrogen-containing MAX phases, which will also serve as starting materials for future doping studies, i.e. on the M- and A-site, and as precursors for novel 2D MXenes.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Kubitza, Niels ; Huck, Isabel ; Pazniak, Hanna ; Kalha, Curran ; Koch, David ; Zhao, Bo ; Thakur, Pardeep K. ; Lee, Tien-Lin ; Riaz, Aysha A. ; Donner, Wolfgang ; Zhang, Hongbin ; Moss, Benjamin ; Wiedwald, Ulf ; Regoutz, Anna ; Birkel, Christina S. |
| Art des Eintrags: | Bibliographie |
| Titel: | Between carbide and nitride MAX phases: sol–gel assisted synthesis and characterization of the carbonitride phase Cr₂GaC₁₋ₓNₓ |
| Sprache: | Englisch |
| Publikationsjahr: | 2024 |
| Ort: | London |
| Verlag: | Royal Society of Chemistry |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Materials Chemistry C |
| Jahrgang/Volume einer Zeitschrift: | 12 |
| (Heft-)Nummer: | 21 |
| DOI: | 10.1039/D4TC00067F |
| Kurzbeschreibung (Abstract): | MAX phases are almost exclusively known as carbides, while nitrides and carbonitrides form a significantly underrepresented subgroup even though they have been shown to possess enhanced properties in comparison to their carbide counterparts. One example is the nitride phase Cr₂GaN which exhibits a spin density wave magnetic state below T = 170 K, while the metallic carbide phase Cr₂GaC follows the MAX phase-typical Pauli-paramagnetic behavior. To investigate the influence on the materials/functional properties of mixing carbon and nitrogen on the X-site, this study aims to synthesize and comprehensively characterize the hitherto unknown carbonitride phase Cr₂GaC₁₋ₓNₓ and compare it to the parent phases. Due to the challenging synthesis of (carbo)nitrides in general, a sol–gel-assisted approach is applied which was recently developed by our group. This process was further improved by using time-efficient microwave heating, leading to a highly phase pure product. STEM-EDX analyses reveal a C/N ratio of roughly 2 : 1. Temperature-dependent XRD measurements confirm the literature-known magnetic phase transition of the parent nitride phase Cr₂GaN, while the incorporation of carbon suppresses the latter. Nonetheless, magnetic characterization of the phases reveals that the magnetic behavior can be specifically influenced by changing the composition of the X-site, resulting in an increase of the susceptibility by increasing the nitrogen amount. Overall, these findings further substantiate the big potential in nitrogen-containing MAX phases, which will also serve as starting materials for future doping studies, i.e. on the M- and A-site, and as precursors for novel 2D MXenes. |
| Zusätzliche Informationen: | This work has been supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) within CRC/TRR 270, projects B03, B02, B04 and A05, (Project-ID 405553726). |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Theorie magnetischer Materialien DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Transregios DFG-Sonderforschungsbereiche (inkl. Transregio) > Transregios > CRC/TRR 270 HoMMage 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut |
| Hinterlegungsdatum: | 14 Jun 2024 12:56 |
| Letzte Änderung: | 19 Jun 2024 05:27 |
| PPN: | 519163125 |
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