진학프로석·박사 채용 접수 플랫폼

“Optimizing the functionality of Fe2P compounds through microstructural control”

Context
Fe2P-type compounds form a rich materials family that has been intensively studied over the past two decades for their unique first-order magnetic transition, which gives rise to giant magnetocaloric effects [Nature 415(2002)150 ; Adv. Mater. 26(2014)2671]. These compounds crystallize in a hexagonal quasi-2D structure with non-equivalent metallic layers stacked along the c-axis, leading to a strong uniaxial magneto-crystalline anisotropy. Recent investigations have shown that subtle chemical compounding can yield a promising combination of intrinsic properties —saturation magnetization, Curie temperature, and anisotropy— making Fe₂P-based systems attractive candidates for permanent magnet applications [Acta Mater. 221(2021)117388].

Project
The main goal of this project is to transform anisotropy into coercivity by designing optimized microstructures, ultimately providing a proof-of-concept for a Fe₂P-based permanent magnet. The research will be primarily experimental, with potential support from micromagnetic and finite elements modeling. The candidate will focus on improving coercivity by optimizing synthesis methods, which currently involve ball-milling and solid-state reactions. Unconventional sintering approaches —such as hot forging using Spark Plasma Sintering— will be investigated. The project will include systematic structural, microstructural, and physical property characterizations to correlate processing routes with performances.

Progress in densification, texturing, phase formation, and defect engineering in Fe₂P compounds is expected to have broader impact, not only for permanent magnets but also for magnetocaloric applications. In particular, how the microstructure can influence the development magneto-elastic phase transitions across finite-size samples should be explored.

This position will also provide opportunities for the candidate to develop his research project in condensed matter physics and magnetic materials, based on the extensive facilities available at the CRISMAT.