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

fYear

2014

fDate

24-29 Aug. 2014

Firstpage

450

Lastpage

451

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 H_C 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;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on

Conference_Location

Rio de Janeiro

ISSN

0589-1485

Print_ISBN

978-1-4799-5205-2

Type

conf

DOI

10.1109/CPEM.2014.6898453

Filename

6898453