研究了半金属丰度全补偿铁磁性Cr2CoAl薄膜的制备、磁性和输运性能，以及Cr缓冲层对nsamel温度的提高

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

Journal of Magnetism and Magnetic Materials Pub Date : 2025-09-27 DOI:10.1016/j.jmmm.2025.173543

Chunhai Liu , Xuefang Dai , Liying Wang , Lei Jin , Cong Liu , Xiaoming Zhang , Ying Liu , Guodong Liu

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引用次数: 0

摘要

完全补偿的铁磁性半金属具有有序自旋构型、净磁化消失、抑制杂散场和太赫兹范围自旋动态响应的特点，在自旋电子学器件中具有重要的应用前景。本文采用磁控溅射法制备了高原子阶的Cr2CoAl薄膜。对其磁性和电输运特性的综合研究，结合理论计算，证实了材料的完全补偿铁磁半金属性。研究发现，在Cr2CoAl中引入Cr缓冲层可以改善其相形成能力，增强其原子排列的有序性。关键是，通过Cr层，Cr2CoAl的nsamel温度提高到310 K。Cr/Cr2CoAl界面的晶格失配可以忽略不计，同时保留了Cr2CoAl层的电子自旋极化。这些结果证明了零净磁矩Cr/Cr2CoAl磁异质结的实现，为先进的自旋电子器件提供了巨大的潜力。

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The fabrication, magnetic and transport properties of Cr2CoAl films with fully-compensated ferrimagnetic half-metallicity, and the enhancement of Néel temperature by Cr buffer layer

Fully-compensated ferrimagnetic half-metals, characterized by ordered spin configurations, vanishing net magnetization, suppressed stray fields, and terahertz-range spin dynamic response, hold significant promise in spintronics devices. In this work, Cr₂CoAl thin films with high atomic order were fabricated via magnetron sputtering. Comprehensive investigations of their magnetic and electrical transport properties, combined with theoretical calculations, confirm the material's fully-compensated ferrimagnetic half-metallicity. Introducing a Cr buffer layer was found to improve the phase formation capability and enhance the atomic arrangement orderliness in Cr₂CoAl. Crucially, the Néel temperature of Cr₂CoAl was elevated to 310 K via the Cr layer. The Cr/Cr₂CoAl interface exhibited negligible lattice mismatch while preserving the electron spin polarization of the Cr₂CoAl layer. These results demonstrate the realization of a Cr/Cr₂CoAl magnetic heterojunction with zero net magnetic moment, offering significant potential for advanced spintronic devices.

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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.