微尺度铁磁性纳米片磁感应强度的定量阿罗特分析方法

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-11-20 DOI:10.1021/acs.nanolett.4c04438

Feng Qin, Zeya Li, Xiangyu Bi, Kun Zhai, Lingyi Ao, Peng Chen, Ganyu Chen, Junwei Huang, Caiyu Qiu, Zhongyuan Liu, Hongtao Yuan

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引用次数: 0

摘要

探测微型铁磁体的磁感应强度是凝聚态物理学中一个长期存在的问题。在各种磁感应强度测量方法中，包括振动样品磁强计和超导量子干涉装置磁强计，几乎所有方法都需要大尺度的块状样品或厚薄膜。然而，在微尺度纳米片上定量测量磁感应强度却是一项巨大挑战。在这里，我们展示了一种定量评估微尺度铁磁纳米片磁感应强度的新分析方法。基于反常霍尔电阻得到的磁化等温线 Arrott 图，我们实现了对微尺度铁磁性 Fe5GeTe2 纳米薄片磁感应强度值的原位评估、面外磁化和面内磁化的识别，以及通过量化临界指数对磁各向异性转变的研究。我们的方法揭示了微尺度铁磁材料中磁相变的关键信息，为相关电子系统的自旋动力学提供了深刻见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

A Quantitative Arrott Analysis Methodology for Magnetic Susceptibility of Microscale Ferromagnetic Nanoflakes

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A Quantitative Arrott Analysis Methodology for Magnetic Susceptibility of Microscale Ferromagnetic Nanoflakes

Probing magnetic susceptibility of a microsized ferromagnet is a long-standing problem in condensed matter physics. Among various measuring methods for magnetic susceptibility including vibrating sample magnetometry and superconducting quantum interference device magnetometry, almost all require large-scale bulk samples or thick films. However, the quantitative measurement for magnetic susceptibility on a microscale nanoflake is a great challenge. Here, we demonstrate a new analysis method to quantitatively evaluate the magnetic susceptibility of a microscale ferromagnetic nanoflake. Based on the Arrott plot of magnetization isotherms obtained from anomalous Hall resistance, we achieve an in situ evaluation of the value of magnetic susceptibility of a microscale ferromagnetic Fe₅GeTe₂ nanoflake, identification of the out-of-plane and in-plane magnetization, and investigation of the magnetic anisotropy transition with quantifying critical exponents. Our method reveals critical information on magnetic phase transition in microscale ferromagnetic materials, providing deep insight into spin dynamics of correlated electron systems.

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.