Characterization on the microstructure of gamma-ray irradiated Nd2Fe14B magnet.
The effect of 60Co gamma-ray irradiation on the microstructure of Nd2Fe14B magnets was investigated with electron spin resonance (ESR) and thermal mechanical analyzer (TMA). When the 60Co gamma-ray with dose from 0 Mrad to 100 Mrad was exposed to Nd2Fel,4B magnet having different sizes at room temperature, the increased demagnetization properties of the Nd2Fe14B magnets were studied by Hall probe. For all samples, changed Curie temperature and micro-crystal structure of Nd2Fe14B magnet by gamma-ray irradiation has been also studied. Moreover the strong and broad single line shaped ESR signal in the resonance magnetic field is attributed to unpaired electron of iron ions in the sample by the effect of gamma-ray irradiation.
Department of Chemistry, Pukyong National University, 599-1 Daeyeon-3-dong, Nam-gu, Busan 608-737, Korea.
Young Chul
YC
Han
Young Hwan
YH
Kim
Hyun Gil
HG
Cha
Chang Woo
CW
Kim
Eun Sun
ES
Ji
Jin Kook
JK
Heo
Hae Woong
HW
Kwon
Young Soo
YS
Kang