Journal
AIP ADVANCES
Volume 5, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4908040
Keywords
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Funding
- Department of Science and Technology (DST), India
- UGC
- University of Delhi
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Transition from room temperature diamagnetic to ferromagnetic state in N doped ZnO (ZnO:N) films grown by pulsed laser deposition with tunable energy density has been identified. ZnO:N films deposited with moderate laser energy density of 2.5 J/cm(2) are single phase and nearly defect free having N dopant substitution at O sites in ZnO lattice, exhibiting intrinsic ferromagnetism. When energy density reduces (<2.5 J/cm(2)), defects in ZnO:N film degrades ferromagnetism and exhibit diamagnetic phase when grown at energy density of 1.0 J/cm(2). Growth kinetics, which in turn depends on laser energy density is playing important role in making transition from ferromagnetic to diamagnetic in ZnO:N films. (C) 2015 Author(s).
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