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Sol-gel derived thin films of Zn0.95Mn0.05O have been implanted with Ar9+ions with doses viz. 5x10e14 ions/cm2 (low), 1x10e15 ions/cm2 (intermediate)and 1x10e16 ions/cm2 (high). Structural, morphological, optical and magneticproperties of the films have been investigated. Structural study confirmedsingle phase, wurtzite structure of the films. The absence of impurity phasehas been confirmed from several measurements. Ion implantation induces a largeconcentration of point defects into the films as identified from optical study.All films exhibit well above room temperature (RT) intrinsic ferromagnetism(FM) as evidenced from field and temperature dependent magnetizationmeasurements. The magnetization attains the maximum value for high dose of Ar9+ion implanted film. It shows RT saturation magnetization (MS) value of0.69emu/gm. The observed FM has been correlated with proportion of intrinsicdefects, such as, zinc and oxygen vacancies and the values of MS. Defectinduced formation of bound magnetic polaron actually controls the FM. Theutility of these films in transparent spin electronic device has also beenexhibited.

Correlation between defect and magnetism of Ar9+ implanted and un-implanted Zn0.95Mn0.05O thin films suitable for electronic application