TY  - JOUR
VL  - 12
N2  - 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.
EP  - 7561
JF  - Journal of Materials Chemistry C
AV  - restricted
ID  - discovery10194588
N1  - This version is the author-accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
SN  - 2050-7526
TI  - Between carbide and nitride MAX phases: sol?gel assisted synthesis and characterization of the carbonitride phase Cr?GaC???N?
UR  - https://doi.org/10.1039/D4TC00067F
SP  - 7552
Y1  - 2024/04/18/
A1  - Kubitza, Niels
A1  - Huck, Isabel
A1  - Pazniak, Hanna
A1  - Kalha, Curran
A1  - Koch, David
A1  - Zhao, Bo
A1  - Thakur, Pardeep K
A1  - Lee, Tien-Lin
A1  - Riaz, Aysha A
A1  - Donner, Wolfgang
A1  - Zhang, Hongbin
A1  - Moss, Benjamin
A1  - Wiedwald, Ulf
A1  - Regoutz, Anna
A1  - Birkel, Christina S
PB  - ROYAL SOC CHEMISTRY
IS  - 21
ER  -