Magnetization jumps in proximity of an itinerant ferromagnet

IF 2.5 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-10 DOI:10.1016/j.jmmm.2025.172994

Carmine Autieri

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引用次数: 0

Abstract

Placing our system in the proximity of the Stoner instability, the mean-field theory of itinerant metamagnetism and its implications are discussed in this study for several different cases. Two analytically solvable models, namely the M

^{6}

Landau theory and the comprehensive analytical solution derived from the one-dimensional tight-binding density of state with the van Hove singularity (VHS), are presented. In our exploration, we calculate the analytical thermodynamic functionals, construct the phase diagrams, pinpoint the quantum critical endpoints, and delineate the critical magnetic fields. We examine the necessary and sufficient conditions for itinerant metamagnetism, scrutinizing the band structure effects and energy functionals. Finally, we extend the theoretical framework to the metamagnetic compound Sr

_{3}

_{2}

_{7}

by using an ab initio tight-binding. Our analysis reveals that the VHS plays a pivotal role in inducing metamagnetism in layered ruthenates Sr

_{3}

_{2}

_{7}

. Furthermore, we conduct a comparative analysis, discussing the distinctions between proximity to a ferromagnetic or an altermagnetic phase.

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来源期刊

Journal of Magnetism and Magnetic Materials 物理-材料科学：综合

CiteScore

5.30

自引率

11.10%

发文量

1149

审稿时长

59 days

期刊介绍： The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.