高场超导磁体剩余磁场对低场磁测量的影响及对策  

Effect and Solution of Residual Magnetic Field of High Field Superconducting Magnet on Low Field Magnetic Measurement

作　　者：马麟[1,2] 蔚晨菲 王维 MA Lin;YU Chenfei;WANG Wei(College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China;Key Laboratory of Advanced Functional Materials,Ministry of Education,Beijing 100124,China)

机构地区：[1]北京工业大学材料科学与工程学院,北京100124 [2]新型功能材料教育部重点实验室,北京100124

出　　处：《分析测试技术与仪器》2024年第6期372-378,共7页Analysis and Testing Technology and Instruments

基　　金：国家自然科学基金项目(面上项目:52277021)。

摘　　要：常用作磁测量的综合物性测量系统中,为其提供强磁场的超导磁体是非理想的第二类超导体.人为引入的“缺陷”可以有效提高超导体的磁场耐受性,使超导磁体能够承载更大的电流并产生更高的磁场.然而,高场超导磁体在退磁过程中会产生剩余磁场,严重影响小磁场条件下的测试结果.通过理论分析和实际试验,对比振荡模式和线性模式在磁场归零时对剩余磁场产生的影响,发现振荡模式可以显著减少剩余磁场,这有利于在小磁场条件下进行磁性测试.The superconducting magnets that provide the strong magnetic field in physical property measurement system commonly used for magnetic measurements use non-ideal Type II superconductors.The artificially introduced"defects"can effectively improve the tolerance of superconductors to magnetic fields,allowing superconducting magnets to carry more currents and generate higher magnetic fields.However,the superconducting magnets generate residual magnetic fields during demagnetization,which can seriously affect the test results under lower magnetic field conditions.Through theoretical analysis and practical measurement,the effects of Oscillate mode and Linear mode on the residual magnetic fields were compared when the magnetic field was set to zero.It was found that the Oscillate mode significantly reduces the residual magnetic field and facilitates magnetic testing at lower magnetic field conditions.

关 键 词：综合物性测量系统 磁测量 振动样品磁强计 剩余磁场 

分 类 号：O65[理学—分析化学] TM937[理学—化学]