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    Weak itinerant ferromagnetism in MAX phase compound Cr1.9Fe0.1GeC

    Suman Mondal1,*, Mohamad Numan2, Kurt Kummer3, Sawada Masahiro4, and Subham Majumdar2

    • *Contact author: mondals@post.bgu.ac.il

    Phys. Rev. Materials 9, 104402 – Published 3 October, 2025

    DOI: https://doi.org/10.1103/n43y-qknx

    Abstract

    Magnetic MAX phase compounds are important materials for studying the two-dimensional magnetism because of their layered crystallographic structure. The hexagonal MAX phase compound Cr2GeC is a Pauli paramagnet, and here we report the induction of an ordered magnetic state by doping Fe at the Cr site. Induced magnetism for small doping concentrations (indicated as 5% and 2.5%) is found to have a weak itinerant ferromagnetic character. The Rhodes-Wohlfarth ratio is found to be 13.29, while the coefficient of electronic heat capacity (Γ) is 27 mJ-mol−1K−2 for Cr1.9Fe0.1GeC. Our x-ray magnetic circular dichorism measurement confirms that the magnetic moment arises from the Fe atom only, and Cr has negligible contribution towards the ordered moment. Our critical analysis indicates that the magnetic phase transition in Cr1.9Fe0.1GeC follows mean field theory.

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