利用原子磁力仪测量软磁材料的剩磁矫顽力  

Measurement of Remanent Coercivity of Soft Magnetic Materials by Atomic Magnetometer

作　　者：缪培贤 杨旭红[1] 张金海[1] 蔡志伟 史彦超 陈大勇[1] 刘志栋[1] MIAO Peixian;YANG Xuhong;ZHANG Jinhai;CAI Zhiwei;SHI Yanchao;CHEN Dayong;LIU Zhidong(Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics,Lanzhou 730000,China)

机构地区：[1]兰州空间技术物理研究所 真空技术与物理重点实验室,兰州730000

出　　处：《真空与低温》2023年第6期562-569,共8页Vacuum and Cryogenics

基　　金：国家自然科学基金(12104198);甘肃省青年科技人才托举工程项目(GXH20220530-11);真空技术与物理重点实验室基金项目(6142207220102)。

摘　　要：介绍了利用抽运-检测型铷原子磁力仪测量软磁材料剩磁矫顽力的实验装置和方法。在磁屏蔽筒中扫描通入磁化线圈的脉冲电流,置于磁化线圈中的软磁样品被磁化和退磁,利用抽运-检测型铷原子磁力仪监测软磁样品的剩磁状态,根据剩磁回线计算出样品的平均剩磁矫顽力。利用该方法测量带状坡莫合金软磁样品的剩磁矫顽力,十次测量的平均值为1.706 mT,剩磁矫顽力测量再现性以相对标准偏差表示为0.05%。该方法具有无零点漂移、复现性好、测量速度快、原位测量等优点,具有开发适用于环境磁学领域的磁测设备的潜力。The experimental equipment and method for measuring the remanent coercivity of soft magnetic materials by a pump-probe rubidium atomic magnetometer are reported.The soft magnetic sample is magnetized and demagnetized by scanning the pulse current applied to the magnetization coil which is placed in the magnetic shielding cylinder.The remanent magnetization of the soft magnetic sample is monitored by a pump-probe rubidium atomic magnetometer,and the average remanent coercivity of the sample is calculated by the remanent magnetization hysteresis loops.The remanent coercivity of a Permalloy strip sample is measured by the experimental device and method proposed in this paper,the average remanent coercivity is 1.706 mT,and the reproducibility of ten repeated measurements expressed as a relative standard deviation is 0.05%.The method of measuring the remanent coercivity by using the pump-probe atomic magnetometer has the advantages of no zero-point drift,good repeatability,fast measurement speed and in-situ measurement,and has the potential to develop magnetic measuring equipment suitable for the field of environmental magnetism in the future.

关 键 词：原子磁力仪 抽运-检测型 软磁材料 剩磁矫顽力 

分 类 号：P318.63[天文地球—固体地球物理学] TM936.3[天文地球—地球物理学]