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    Observation of Vortex Matching Phenomena in Antidot Array of NbN Thin Film

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    We report vortex matching phenomenon in rectangular antidot array fabricated on epitaxial NbN thin film. The antidot array was fabricated using Focussed Ion Beam milling technique. The magneto-transport measurements points to a period doubling transition at higher magnetic field for rectangular lattices. The results are discussed within the light of several models including the multi-vortex model, the matched lattice model and the super-matched lattice model.Comment: Added references, modified abstract and discussions and corrected typo-graphic errors. Accepted for proceedings of M2S-IX 2009, Tokyo (Physica C
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