Room-temperature ferromagnetism with high magnetic moment in Cu-doped AlN single crystal whiskers*
Jiang Liang-Bao, Liu Yu, Zuo Si-Bin, Wang Wen-Jun†
       
(a) and (b) M – H curves by cycling the field from 5 kOe to −5 kOe, and back to 5 kOe for Cu powder, measured at 150 K and 300 K. (c) M – T curves of Cu powder.