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Mechanically induced defects in milled CdZnSe nanocrystal: a low-temperature electron spin resonance spectroscopy analysis


Citation

Muh'd, Ibrahim Bagudo and Talib, Zainal Abidin and Liew, Josephine Ying Chyi (2017) Mechanically induced defects in milled CdZnSe nanocrystal: a low-temperature electron spin resonance spectroscopy analysis. Results in Physics, 7. 1357 - 1360. ISSN 2211-3797

Abstract

The electron spin resonance (ESR) linewidth of the milled powder decreases as a function of increasing temperature. On the other hand, the intensity of the signal increases with increasing temperature from 108 K to 243 K and subsequently approaches Curie-like temperature behavior above 245 K. These behaviors were understood in terms of the orbital degeneracy of fast-relaxing impurities, such as Fe3+ ion debris, from the grinding media that was embedded in the atomic structure of the milled powder and are not completely quenched. At lower temperature, only ±1/2 is occupied and the excited energy state is less likely effective in dipolar broadening compared with lower energy states of ±5/2 and ±3/2. In this regard, decrease in linewidth should be expected with increasing temperature.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.1016/j.rinp.2017.03.015
Publisher: Elsevier
Keywords: Milled CdZnSe nanocrystal; Low-temperature; Electron spin resonance; Spectroscopy analysis
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 08 Jan 2020 06:11
Last Modified: 08 Jan 2020 06:11
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.rinp.2017.03.015
URI: http://psasir.upm.edu.my/id/eprint/62381
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