磁熵变与居里温度的测量  

Magnetic Entropy Change and Measurement of Curie Temperature

作　　者：潘成福[1] 

机构地区：[1]河北师范大学物理系,河北石家庄050016

出　　处：《青海师专学报》2000年第3期37-39,共3页Journal of Qinghai Junior Teachers' College

摘　　要：用M -T曲线测量居里温度时 ,由于热电偶的“延迟”效应使测量结果存在较大误差。根据热力学理论可知 ,磁性材料在居里点具有最大磁熵变 ,因此可由△SM -T曲线的峰值确定居里点TC。这种方法由于测量过程是恒温的 ,因而完全避免了“延迟”效应所产生的误差。Deferment effect is the main facter that causes the measurement error when determine the Curie temperature by M-T curve.According to the themomechanics theory,magnetic entropy change △S M of the magnetic materials has the peak value at Curie temperature,this enable us to determine the Curie point by the peak value of △S M-T curve.This experiment method can entirely avoid the measurement error caused by the deferment effect due to the constant temperature of the measurement process.

关 键 词：居里温度 磁熵变 测量 铁磁学 

分 类 号：O482.5[理学—固体物理]