TY  - JOUR
AU  - Mandal, Shuvam
AU  - Panigrahi, Ajit
AU  - Rath, Ashutosh
AU  - Bönisch, Matthias
AU  - Sengupta, Pradyut
AU  - Debata, Mayadhar
AU  - Basu, Suddhasatwa
TI  - Formation of L1<sub>0</sub> Ordering in FeNi by Mechanical Alloying and Field-Assisted Heat Treatment: Synchrotron XRD Studies
JO  - ACS omega
VL  - 8
IS  - 15
SN  - 2470-1343
CY  - Washington, DC
PB  - ACS Publications
M1  - PUBDB-2023-03426
SP  - 13690 - 13701
PY  - 2023
AB  - L10-ordered FeNi, tetrataenite, found naturally in meteorites is a predilection for next-generation rare-earth free permanent magnetic materials. However, the synthesis of this phase remains unattainable in an industrially relevant time frame due to the sluggish diffusion of Fe and Ni near the order–disorder temperature (593 K) of L1<sub>0</sub> FeNi. The present work describes the synthesis of ordered L1<sub>0</sub> FeNi from elemental Fe and Ni powders by mechanical alloying up to 12 h and subsequent heat treatment at 623 K for 1000 h without a magnetic field and for 4 h in the presence of 1.5 T magnetic field. Also, to address the ambiguity of L1<sub>0</sub> phase identification caused by the low difference in the X-ray scattering factor of Fe and Ni, synchrotron-based X-ray diffraction is employed, which reveals that 6 h milling is sufficient to induce L1<sub>0</sub> FeNi formation. Further milling for 12 h is done to achieve a chemically homogeneous powder. The phase fraction of L1<sub>0</sub>-ordered FeNi is quantified to ∼9 wt 
LB  - PUB:(DE-HGF)16
C6  - 37091413
UR  - <Go to ISI:>//WOS:000969765000001
DO  - DOI:10.1021/acsomega.2c07869
UR  - https://bib-pubdb1.desy.de/record/585153
ER  -