理化检验-物理分册2024，Vol.60Issue(3)：27-30,37,5.DOI:10.11973/lhjy-wl202403007
磁相变材料热膨胀与磁致伸缩效应测试
Testing of thermal expansion and magnetostrictive effect of magnetic phase transition materials
摘要
Abstract
A characterization method for the thermal expansion coefficient of magnetic phase transition materials was developed using strain gauge testing methods based on a comprehensive physical performance testing system in low-temperature and magnetic field environments.The reliability of the test results was verified,and the negative expansion performance of magnetic phase transition materials LaFe11Co0.8Si1.2 was studied.The results show that at the Curie temperature,the thermal expansion of LaFe11Co0.8Si1.2 material decreased with the increased of temperature.The reason was that the material undergone a magnetic phase transition from ferromagnetism to paramagnetism,resulting in magnetostriction effect and offsetting the thermal expansion and contraction caused by atomic non harmonic vibration,ultimately led to negative thermal expansion of the material.关键词
负热膨胀/应变片/电子探针/热膨胀系数/磁致伸缩曲线Key words
negative thermal expansion/strain gauge/electron probe/coefficient of thermal expansion/magnetostrictive curve分类
通用工业技术引用本文复制引用
王新明,李明,孙洁,卢焕明..磁相变材料热膨胀与磁致伸缩效应测试[J].理化检验-物理分册,2024,60(3):27-30,37,5.基金项目
浙江省基础公益研究计划项目(LGC21A040001) （LGC21A040001）
