Cover Page April-2014-Advanced Materials Letters

Advanced Materials Letters

Volume 5, Issue 4, Pages 199-205, April 2014
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Structural, Optical And Magnetic Properties Of (Fe, Ag) Co-doped ZnO Nanostructures

B. Sankara  Reddy1, S. Venkatramana Reddy1*,  N. Koteeswara Reddy2, Y. Prabhakara  Reddy3

1Department of Physics, Sri Venkateswara University, Tirupati 517 502, Andhra Pradesh, India

2Center for Nanosciaence and Engineering (CeNSE), Indian Institute of Science, Bangalore 560012, India

3Department of Physics, Sri Padmavati Mahila Visvavidyalayam, Tirupati 517502, A.P., India

Adv. Mater. Lett., 2014, 5 (4), pp 199-205

DOI: 10.5185/amlett.2013.8529

Publication Date (Web): Feb 16, 2014

E-mail: drsvreddy123@gmail.com

Abstract

The (Fe, Ag) co-doped ZnO nanostructures are developed through chemical precipitation method at various percentages of Fe. The X-ray diffraction studies suggest that all the as-synthesized (Fe, Ag) doped ZnO nanopowders have single phase wurtzite structure with no secondary phases. However, the positions of diffracted peaks slightly shifted towards lower (2θ) angles. Photoluminescence studies reveal that 1 mol% of Fe doped ZnO sample has the best ultra violet (UV) emission properties than the other samples. On the other hand, 5 mol% of Fe doped ZnO nanopowders consists of strong green emission band, which belongs to oxygen interstitial defect states. Magnetization analysis shows that 5 mol% of Fe doped ZnO nanopowders have highest room temperature ferromagnetism (RTFM) than the RTFM of other samples. The observed RTFM in co-doped ZnO nanopowders is discussed with the help of structural and emission studies. The results strongly suggest the future development of efficient luminescence and magnetic materials at normal laboratory temperatures with (Fe, Ag) co-doped ZnO nanostructures.

Keywords

Co-doped ZnO, nanoplates, HRTEM, optical properties, ferromagnetism

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