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Title: Room temperature ferromagnetism in undoped and Fe doped ZnO nanorods: Microwave-assisted synthesis

Abstract

One-dimensional (1D) undoped and Fe doped ZnO nanorods of average length {approx}1 {mu}m and diameter {approx}50 nm have been obtained using a microwave-assisted synthesis. The magnetization (M) and coercivity (H{sub c}) value obtained for undoped ZnO nanorods at room temperature is {approx}5x10{sup -3} emu/g and {approx}150 Oe, respectively. The Fe doped ZnO samples show significant changes in M -H loop with increasing doping concentration. Both undoped and Fe doped ZnO nanorods exhibit a Curie transition temperature (T{sub c}) above 390 K. Electron spin resonance and Moessbauer spectra indicate the presence of ferric ions. The origin of ferromagnetism in undoped ZnO nanorods is attributed to localized electron spin moments resulting from surface defects/vacancies, where as in Fe doped samples is explained by F center exchange mechanism. -- Graphical abstract: Room temperature ferromagnetism has been reported in undoped and Fe doped ZnO nanorods of average length {approx}1 {mu}m and diameter {approx}50 nm. Display Omitted Research Highlights: {yields} Microwave-assisted synthesis of undoped and Fe doped ZnO nanorods. {yields} Observation of room temperature ferromagnetism in undoped and Fe doped ZnO nanorods. {yields} Transition temperature (T{sub c}) obtained in undoped and doped samples is above 390 K. {yields} In undoped ZnO origin of ferromagnetism ismore » explained in terms of defects/vacancies. {yields} Ferromagnetism in Fe doped ZnO is explained by F-center exchange mechanism.« less

Authors:
;  [1]; ;  [2]
  1. DST unit on Nanoscience, Department of Physics, University of Pune, Pune 411007 (India)
  2. Physical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008 (India)
Publication Date:
OSTI Identifier:
21494190
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 184; Journal Issue: 2; Other Information: DOI: 10.1016/j.jssc.2010.11.008; PII: S0022-4596(10)00514-1; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; COERCIVE FORCE; DOPED MATERIALS; ELECTRON SPIN RESONANCE; F CENTERS; FERROMAGNETISM; IRON; MAGNETIC SEMICONDUCTORS; MAGNETIZATION; MICROWAVE RADIATION; MOESSBAUER EFFECT; NANOSTRUCTURES; SURFACES; TEMPERATURE RANGE 0273-0400 K; TEMPERATURE RANGE 0400-1000 K; TRANSITION TEMPERATURE; ZINC OXIDES; CHALCOGENIDES; COLOR CENTERS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; ELECTROMAGNETIC RADIATION; ELEMENTS; MAGNETIC RESONANCE; MAGNETISM; MATERIALS; METALS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; POINT DEFECTS; RADIATIONS; RESONANCE; SEMICONDUCTOR MATERIALS; TEMPERATURE RANGE; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENTS; VACANCIES; ZINC COMPOUNDS

Citation Formats

Limaye, Mukta V, Singh, Shashi B, Das, Raja, Poddar, Pankaj, and Kulkarni, Sulabha K., E-mail: s.kulkarni@iiserpune.ac.i. Room temperature ferromagnetism in undoped and Fe doped ZnO nanorods: Microwave-assisted synthesis. United States: N. p., 2011. Web. doi:10.1016/j.jssc.2010.11.008.
Limaye, Mukta V, Singh, Shashi B, Das, Raja, Poddar, Pankaj, & Kulkarni, Sulabha K., E-mail: s.kulkarni@iiserpune.ac.i. Room temperature ferromagnetism in undoped and Fe doped ZnO nanorods: Microwave-assisted synthesis. United States. https://doi.org/10.1016/j.jssc.2010.11.008
Limaye, Mukta V, Singh, Shashi B, Das, Raja, Poddar, Pankaj, and Kulkarni, Sulabha K., E-mail: s.kulkarni@iiserpune.ac.i. Tue . "Room temperature ferromagnetism in undoped and Fe doped ZnO nanorods: Microwave-assisted synthesis". United States. https://doi.org/10.1016/j.jssc.2010.11.008.
@article{osti_21494190,
title = {Room temperature ferromagnetism in undoped and Fe doped ZnO nanorods: Microwave-assisted synthesis},
author = {Limaye, Mukta V and Singh, Shashi B and Das, Raja and Poddar, Pankaj and Kulkarni, Sulabha K., E-mail: s.kulkarni@iiserpune.ac.i},
abstractNote = {One-dimensional (1D) undoped and Fe doped ZnO nanorods of average length {approx}1 {mu}m and diameter {approx}50 nm have been obtained using a microwave-assisted synthesis. The magnetization (M) and coercivity (H{sub c}) value obtained for undoped ZnO nanorods at room temperature is {approx}5x10{sup -3} emu/g and {approx}150 Oe, respectively. The Fe doped ZnO samples show significant changes in M -H loop with increasing doping concentration. Both undoped and Fe doped ZnO nanorods exhibit a Curie transition temperature (T{sub c}) above 390 K. Electron spin resonance and Moessbauer spectra indicate the presence of ferric ions. The origin of ferromagnetism in undoped ZnO nanorods is attributed to localized electron spin moments resulting from surface defects/vacancies, where as in Fe doped samples is explained by F center exchange mechanism. -- Graphical abstract: Room temperature ferromagnetism has been reported in undoped and Fe doped ZnO nanorods of average length {approx}1 {mu}m and diameter {approx}50 nm. Display Omitted Research Highlights: {yields} Microwave-assisted synthesis of undoped and Fe doped ZnO nanorods. {yields} Observation of room temperature ferromagnetism in undoped and Fe doped ZnO nanorods. {yields} Transition temperature (T{sub c}) obtained in undoped and doped samples is above 390 K. {yields} In undoped ZnO origin of ferromagnetism is explained in terms of defects/vacancies. {yields} Ferromagnetism in Fe doped ZnO is explained by F-center exchange mechanism.},
doi = {10.1016/j.jssc.2010.11.008},
url = {https://www.osti.gov/biblio/21494190}, journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = 2,
volume = 184,
place = {United States},
year = {2011},
month = {2}
}