Structural, optical and magnetic properties of samarium doped zinc phosphate glasses embedded with nickel nanoparticles

Two series of 40ZnO-(60-x)P2O5-xSm2O3 and 40ZnO-(59-y)P2O5-Sm2O3- yNiO glasses are prepared by melt-quenching technique with 1.0 = x = 4.0 mol% and 0.5 = y = 2.0 mol% respectively. The glass is characterized by X-Ray Diffractometer (XRD), Transmission Electron Microscope (TEM), High Resolution Trans...

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Main Author:	Mohamad Azmi, Siti Amlah
Format:	Thesis
Language:	English
Published:	2016
Subjects:	QC Physics
Online Access:	http://eprints.utm.my/id/eprint/78986/1/SitiAmlahMohamadPFS2016.pdf
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spelling	my-utm-ep.789862018-09-19T05:21:39Z Structural, optical and magnetic properties of samarium doped zinc phosphate glasses embedded with nickel nanoparticles 2016 Mohamad Azmi, Siti Amlah QC Physics Two series of 40ZnO-(60-x)P2O5-xSm2O3 and 40ZnO-(59-y)P2O5-Sm2O3- yNiO glasses are prepared by melt-quenching technique with 1.0 = x = 4.0 mol% and 0.5 = y = 2.0 mol% respectively. The glass is characterized by X-Ray Diffractometer (XRD), Transmission Electron Microscope (TEM), High Resolution Transmission Electron Microscope (HRTEM), Fourier Transform Infrared (FTIR) spectrometer, Raman spectrometer, UV-Vis NIR spectrophotometer, Photoluminescence (PL) spectrometer, Vibrating Sample Magnetometer (VSM) and Electron Spin Resonance (ESR) spectrometer. The XRD pattern confirms the amorphous nature of the glass and the TEM image reveals the existence of nickel nanoparticles (Ni NPs) with average size ~8 nm. Meanwhile, HRTEM reveals the lattice spacing of face centered cubic (FCC) structure of nickel is 0.35 nm at (100) plane. Four major IR absorption peaks are found to be at 723 cm-1, 916 cm-1, 1081 cm-1 and 1280 cm-1 corresponding to stretching vibration of symmetric (P-O-P), asymmetric (P-O-P), asymmetric (P-O-) and asymmetric (P=O) respectively. Raman spectra display two significant peaks at 708 cm-1 and 1201 cm-1 attributed to the symmetric and asymmetric stretching vibrations of P-O-P, respectively. The Raman intensities for both peaks exhibit a rapid decrease with the increase of Ni NPs concentration. The absorption spectra of samarium ions consist of five bands attributed to absorption from the ground state 6H5/2 to the excited states 6F1/2, 6F3/2, 4F5/2, 4F7/2 and 6F9/2. The surface plasmon resonance (SPR) peaks of Ni NPs are detected at 433 nm and 475 nm. Photoluminescence emission exhibits four peaks corresponding to 4G5/2 - 6H5/2, 6H7/2, 6H9/2, and 6H11/2 transitions. It is observed that all peaks experience significant quenching effect with increasing concentration of Ni NPs, suggesting that there is a strong energy transfer from excited samarium ions to the nickel ions. The glass magnetization and susceptibility in magnetic field up to 12 kOe at room temperature is found to be in the range of (0.11-2.02) x10-2 emu/g and (0.09-1.68) x10-6 emu/Oeg respectively. The obtained hysteresis curve and g-factor value of 1.99 to 2.34 indicate that the glass samples are superparamagnetic. It is concluded that samarium doped zinc phosphate glass embedded with nickel nanoparticles could be useful for magneto-optical and solid state devices. 2016 Thesis http://eprints.utm.my/id/eprint/78986/ http://eprints.utm.my/id/eprint/78986/1/SitiAmlahMohamadPFS2016.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:106211 phd doctoral Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QC Physics
spellingShingle	QC Physics Mohamad Azmi, Siti Amlah Structural, optical and magnetic properties of samarium doped zinc phosphate glasses embedded with nickel nanoparticles
description	Two series of 40ZnO-(60-x)P2O5-xSm2O3 and 40ZnO-(59-y)P2O5-Sm2O3- yNiO glasses are prepared by melt-quenching technique with 1.0 = x = 4.0 mol% and 0.5 = y = 2.0 mol% respectively. The glass is characterized by X-Ray Diffractometer (XRD), Transmission Electron Microscope (TEM), High Resolution Transmission Electron Microscope (HRTEM), Fourier Transform Infrared (FTIR) spectrometer, Raman spectrometer, UV-Vis NIR spectrophotometer, Photoluminescence (PL) spectrometer, Vibrating Sample Magnetometer (VSM) and Electron Spin Resonance (ESR) spectrometer. The XRD pattern confirms the amorphous nature of the glass and the TEM image reveals the existence of nickel nanoparticles (Ni NPs) with average size ~8 nm. Meanwhile, HRTEM reveals the lattice spacing of face centered cubic (FCC) structure of nickel is 0.35 nm at (100) plane. Four major IR absorption peaks are found to be at 723 cm-1, 916 cm-1, 1081 cm-1 and 1280 cm-1 corresponding to stretching vibration of symmetric (P-O-P), asymmetric (P-O-P), asymmetric (P-O-) and asymmetric (P=O) respectively. Raman spectra display two significant peaks at 708 cm-1 and 1201 cm-1 attributed to the symmetric and asymmetric stretching vibrations of P-O-P, respectively. The Raman intensities for both peaks exhibit a rapid decrease with the increase of Ni NPs concentration. The absorption spectra of samarium ions consist of five bands attributed to absorption from the ground state 6H5/2 to the excited states 6F1/2, 6F3/2, 4F5/2, 4F7/2 and 6F9/2. The surface plasmon resonance (SPR) peaks of Ni NPs are detected at 433 nm and 475 nm. Photoluminescence emission exhibits four peaks corresponding to 4G5/2 - 6H5/2, 6H7/2, 6H9/2, and 6H11/2 transitions. It is observed that all peaks experience significant quenching effect with increasing concentration of Ni NPs, suggesting that there is a strong energy transfer from excited samarium ions to the nickel ions. The glass magnetization and susceptibility in magnetic field up to 12 kOe at room temperature is found to be in the range of (0.11-2.02) x10-2 emu/g and (0.09-1.68) x10-6 emu/Oeg respectively. The obtained hysteresis curve and g-factor value of 1.99 to 2.34 indicate that the glass samples are superparamagnetic. It is concluded that samarium doped zinc phosphate glass embedded with nickel nanoparticles could be useful for magneto-optical and solid state devices.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Mohamad Azmi, Siti Amlah
author_facet	Mohamad Azmi, Siti Amlah
author_sort	Mohamad Azmi, Siti Amlah
title	Structural, optical and magnetic properties of samarium doped zinc phosphate glasses embedded with nickel nanoparticles
title_short	Structural, optical and magnetic properties of samarium doped zinc phosphate glasses embedded with nickel nanoparticles
title_full	Structural, optical and magnetic properties of samarium doped zinc phosphate glasses embedded with nickel nanoparticles
title_fullStr	Structural, optical and magnetic properties of samarium doped zinc phosphate glasses embedded with nickel nanoparticles
title_full_unstemmed	Structural, optical and magnetic properties of samarium doped zinc phosphate glasses embedded with nickel nanoparticles
title_sort	structural, optical and magnetic properties of samarium doped zinc phosphate glasses embedded with nickel nanoparticles
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2016
url	http://eprints.utm.my/id/eprint/78986/1/SitiAmlahMohamadPFS2016.pdf
_version_	1747818120077115392

Structural, optical and magnetic properties of samarium doped zinc phosphate glasses embedded with nickel nanoparticles

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