Open AccessRoom Temperature Ferromagnetism of Ni-doped SnO2 System
Author(s) -
Junying Zhang,
Yun Qu,
Qianghong Wang
Publication year - 2010
Publication title -
modern applied science
Language(s) - English
Resource type - Journals
eISSN - 1913-1852
pISSN - 1913-1844
DOI - 10.5539/mas.v4n11p124
Subject(s) - ferromagnetism , antiferromagnetism , polaron , materials science , condensed matter physics , doping , annealing (glass) , oxidizing agent , magnetic moment , exchange interaction , ion , rutile , chemistry , physics , metallurgy , organic chemistry , quantum mechanics , electron
A series of Sn1-xNixO2 films were fabricated by sol-gel method. All samples have pure rutile structure and exhibit room temperature ferromagnetism (RTFM). Magnetic moment per Ni ion decreases with the increase of Ni doping because antiferromagnetic super-exchange interaction takes place in the nearest neighbour Ni2+ ions for the samples with high x. The results of the annealing at oxidizing and reducing atmosphere show oxygen vacancies play a crucial role in producing ferromagnetism. This result supports that the origin of RTFM can be explained with Bound magnetic polaron (BMP) model.