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Comparative Study of Room‐Temperature Ferromagnetism in Cu‐Doped ZnO Nanowires Enhanced by Structural Inhomogeneity
Author(s) -
Xing Guo Zhong,
Yi Jia Bao,
Tao Jun Guang,
Liu Tao,
Wong Lai Mun,
Zhang Zhou,
Li Gong Ping,
Wang Shi Jie,
Ding Jun,
Sum Tze Chien,
Huan Cheng Hon Alfred,
Wu Tom
Publication year - 2008
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200703149
Subject(s) - ferromagnetism , materials science , annealing (glass) , doping , polaron , nanowire , condensed matter physics , ferromagnetic material properties , nanotechnology , optoelectronics , metallurgy , magnetic field , magnetization , physics , quantum mechanics , electron
Cu‐doped ZnO nanowires are prepared using two different approaches, and a comparative study of their magnetic properties is carried out. Compared with direct growth using a conventional vapor transport method, annealing a ZnO/Cu core/shell structure leads to significantly enhanced room‐temperature ferromagnetism (see figure). Structural inhomogeneity boosts the ferromagnetism by promoting the formation of bound magnetic polarons.