2022/03/24 by Jun-Fa Lin, Lin, Jun-Fa, Huan Wang +23
Physics and Astronomy · #FOS: Physical sciences #Magnetic properties of thin films #Materials Science (cond-mat.mtrl-sci) #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #Theoretical and Computational Physics #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.2203.12778
8 pages, 6 figures. arXiv admin note: substantial text overlap with arXiv:1803.05905 by other authors
arxiv created 2022/03/24 · openalex publication_date 2022/03/24 · arxiv updated 2022/03/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
High-Curie-temperature ferromagnets are promising candidates for designing new spintronic devices. Here we have successfully synthesized a single-crystal sample of the itinerant ferromagnet Mn 5Ge3 used flux method and its critical properties were investigated by means of bulk dc-magnetization at the boundary between the ferromagnetic (FM) and paramagnetic (PM) phase. Critical exponents β=0.336 ± 0.001 with a critical temperature Tc=300.29 ± 0.01 K and γ=1.193 ± 0.003 with Tc = 300.15 ± 0.05 K are obtained by the modified Arrott plot, whereas δ= 4.61 ± 0.03 is deduced by a critical isotherm analysis at Tc = 300 K. The self-consistency and reliability of these critical exponents are verified by the Widom scaling law and the scaling equations. Further analysis reveals that the spin coupling in Mn 5Ge3 exhibits three-dimensional Ising-like behavior. The magnetic exchange is found to decay as J(r)≈ r-4.855 and the spin interactions are extended beyond the nearest neighbors, which may be related to different set of Mn--Mn interactions with unequal magnitude of exchange strengths. Additionally, the existence of noncollinear spin configurations in Mn 5 Ge 3 results in a small deviation of obtained critical exponents from those for standard 3D-Ising model.