Title :
Sweep rate dependence of coercivity in closed magnetic circuit
Author :
Gong, W.J. ; Hou, R.F. ; Xu, Z.Y. ; He, Jinwei ; Zhang, Z.G. ; Fan, Wei ; Lin, A.L.
Author_Institution :
Magn. Mater. Meas. Lab., Nat. Inst. of Metrol., Beijing, China
Abstract :
A hysteresisgraph has been set up to investigate the sweep rate dependence of coercivity on NdFeB magnets in closed magnetic circuit. The linear relationship between coercivity and logarithmic sweep rate has been found and the maximum difference of HC in the sweep rate is 1.1%. The fluctuation field and activation volume have been deduced, which is in agreement with results in open magnetic circuit. This study is helpful to understand the coercivity variation of NdFeB in closed magnetic circuit in industrial measurement.
Keywords :
boron alloys; coercive force; iron alloys; magnetic circuits; magnetic hysteresis; magnets; neodymium alloys; NdFeB; closed magnetic circuit; hysteresisgraph; industrial measurement; logarithmic sweep rate; magnet; open magnetic circuit; sweep rate coercivity dependence; Coercive force; Magnetic circuits; Magnetic domain walls; Magnetic domains; Magnetic field measurement; Magnetic recording; Saturation magnetization; Activation volume; Coercivity; Fluctuation field; Measurement; NdFeB; Sweep rate;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4799-5205-2
DOI :
10.1109/CPEM.2014.6898453
