华东师范大学学报（自然科学版） ›› 2024, Vol. 2024 ›› Issue (4): 40-46.doi: 10.3969/j.issn.1000-5641.2024.04.004

• 物理学与电子学 • 上一篇    下一篇

基于铷原子系综的等温剩磁检测系统研究

陈悦1, 王梓畅1, 包谷之2, 吴媛1, 陈丽清1,*()   

  1. 1. 华东师范大学 物理与电子科学学院, 上海　200241
    2. 上海交通大学 物理与天文学院, 上海　200240
  • 收稿日期:2023-02-09 出版日期:2024-07-25 发布日期:2024-07-23
  • 通讯作者: 陈丽清 E-mail:lqchen@phy.ecnu.edu.cn
  • 基金资助:
    国家自然科学基金 (12104161, 11874152); 上海市教育委员会科研创新计划重大项目 (2021-01-07-00-08-E00099); 上海市科技英才扬帆计划 (19YF1414300, 19YF1421800)

Research on an isothermal remanent magnetization detection system based on the rubidium atomic ensemble

Yue CHEN1, Zichang WANG1, Guzhi BAO2, Yuan WU1, Liqing CHEN1,*()   

  1. 1. School of Physics and Electronic Science, East China Normal University, Shanghai　200241, China
    2. School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai　200240, China
  • Received:2023-02-09 Online:2024-07-25 Published:2024-07-23
  • Contact: Liqing CHEN E-mail:lqchen@phy.ecnu.edu.cn

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摘要：

等温剩磁(isothermal remanent magnetization, IRM)是物质磁性测量分析的重要研究内容之一. 然而, 常用的等温剩磁测量系统因测量灵敏度低、体积庞大且维护成本高等问题无法满足实际使用要求. 因此, 设计并研制测量精度高且便于使用的小型化等温剩磁检测系统成为必然, 其中, 基于铷原子系综的磁场测量技术具有灵敏度高、易小型化等优点. 利用该磁场检测技术, 设计并搭建了等温剩磁检测系统, 着重介绍了磁化装置、剩磁检测装置等核心部件的设计方案, 并成功地对采自华东师范大学闵行校区樱桃河附近表层土壤进行了检测, 实现了该土壤等温剩磁曲线的测量. 研究表明, 该系统操作容易且便于维护, 在环境磁学、地质勘探和生物磁场测量领域有很重要的应用前景.

关键词: 等温剩磁, 铷原子系综, 磁性特征

Abstract:

Isothermal remanent magnetization(IRM) is an important research topic in the analysis of material magnetic characteristics. However, owing to its low sensitivity, large volume, and high maintenance cost, the classical IRM measurement system cannot satisfy the practical requirements. Therefore, it is necessary to develop the IRM measurement system to attain a high sensitivity and small size. The magnetic field measurement technology based on the rubidium atomic ensemble has the advantages of high sensitivity and small size; accordingly, in this study, an IRM measurement system based on rubidium atomic ensemble is proposed. Here we focus on the design process regarding the magnetization device and residual magnetism detection device. More importantly, the IRM measurement system can successfully detect the soil samples collected from the Cherry River in Minhang Campus of East China Normal University. Our research demonstrates that the proposed detection system is easy to operate and maintain. Moreover, it has significant application prospects in the fields of environmental magnetism, geological exploration, and biological magnetic field measurement.

Key words: isothermal remanent magnetization, rubidium atomic ensemble, magnetic property

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