| http://www.w3.org/ns/prov#value | - Moreover, in the above oxide semiconductor, in some cases, a transition metal element such as Fe or Ni or an oxide of the transition metal is contained as an impurity element in addition to a metal element contained as M. Needless to say, the oxide semiconductor material is not limited to the above materials and a variety of oxide semiconductor materials such as zinc oxide or indium oxide can be u
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