Structural, morphological and magnetic properties of Eu-doped CoFe2O4 nano-ferrites

Europium (Eu) doped spinel cobalt ferrites having composition CoEuxFe2−xO4 where x = 0.00, 0.03, 0.06, 0.09, 0.12 were fabricated by co-precipitation route. In order to observe the phase development of the ferrite samples, thermo-gravimetric analysis was carried out. The synthesized samples were sub...

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Main Authors: Aiman Zubair, Zahoor Ahmad, Azhar Mahmood, Weng-Chon Cheong, Irshad Ali, Muhammad Azhar Khan, Adeel Hussain Chughtai, Muhammad Naeem Ashiq
Format: Article
Language:English
Published: Elsevier 2017-01-01
Series:Results in Physics
Online Access:http://www.sciencedirect.com/science/article/pii/S2211379717305132
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spelling doaj-060f8bd32b1347fa84242f13c61926fc2020-11-24T21:36:54ZengElsevierResults in Physics2211-37972017-01-01732033208Structural, morphological and magnetic properties of Eu-doped CoFe2O4 nano-ferritesAiman Zubair0Zahoor Ahmad1Azhar Mahmood2Weng-Chon Cheong3Irshad Ali4Muhammad Azhar Khan5Adeel Hussain Chughtai6Muhammad Naeem Ashiq7Institute of Chemical Sciences, Bahauddin Zakariya University, Multan 60800, PakistanDepartment of Chemistry, University of Engineering and Technology (UET), Lahore, PakistanDepartment of Chemistry, Tsinghua University, Beijing 100084, ChinaDepartment of Chemistry, Tsinghua University, Beijing 100084, ChinaDepartment of Physics, Bahauddin Zakariya University, Multan 60800, PakistanDepartment of Physics, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan; Corresponding authors.Institute of Chemical Sciences, Bahauddin Zakariya University, Multan 60800, PakistanInstitute of Chemical Sciences, Bahauddin Zakariya University, Multan 60800, Pakistan; Corresponding authors.Europium (Eu) doped spinel cobalt ferrites having composition CoEuxFe2−xO4 where x = 0.00, 0.03, 0.06, 0.09, 0.12 were fabricated by co-precipitation route. In order to observe the phase development of the ferrite samples, thermo-gravimetric analysis was carried out. The synthesized samples were subjected to X-ray diffraction analysis for structural investigation. All the samples were found to constitute face centered cubic (FCC) spinel structure belonging to Fd3m space group. Scanning electron microscopy revealed the formation of nanocrystalline grains with spherical shape. Energy dispersive X-ray spectra confirmed the presence of Co, Eu, Fe and O elements with no existence of any impurity. The magnetic hysteresis curves measured at room temperature exhibited ferrimagnetic behavior with maximum saturation magnetization (Ms) of 65 emu/g and coercivity (Hc) of 966 Oe. The origin of ferrimagnetism in Eu doped cobalt ferrites was discussed in detail with reverence to the allocation of Co2+ and Fe3+ ions within the spinel lattice. The overall coercivity was increased (944–966 Oe) and magnetization was decreased (65–46 emu/g) with the substitution of Eu3+. The enhancement of former is ascribed to the transition from multi domain to single domain state and reduction in lateral is attributed to the incorporation of nonmagnetic Eu ions for Fe, resulting in weak superexchange interactions. Keywords: Europium doped cobalt ferrites, Co-precipitation, X-ray diffraction, Scanning electron microscopy, Magnetic propertieshttp://www.sciencedirect.com/science/article/pii/S2211379717305132
collection DOAJ
language English
format Article
sources DOAJ
author Aiman Zubair
Zahoor Ahmad
Azhar Mahmood
Weng-Chon Cheong
Irshad Ali
Muhammad Azhar Khan
Adeel Hussain Chughtai
Muhammad Naeem Ashiq
spellingShingle Aiman Zubair
Zahoor Ahmad
Azhar Mahmood
Weng-Chon Cheong
Irshad Ali
Muhammad Azhar Khan
Adeel Hussain Chughtai
Muhammad Naeem Ashiq
Structural, morphological and magnetic properties of Eu-doped CoFe2O4 nano-ferrites
Results in Physics
author_facet Aiman Zubair
Zahoor Ahmad
Azhar Mahmood
Weng-Chon Cheong
Irshad Ali
Muhammad Azhar Khan
Adeel Hussain Chughtai
Muhammad Naeem Ashiq
author_sort Aiman Zubair
title Structural, morphological and magnetic properties of Eu-doped CoFe2O4 nano-ferrites
title_short Structural, morphological and magnetic properties of Eu-doped CoFe2O4 nano-ferrites
title_full Structural, morphological and magnetic properties of Eu-doped CoFe2O4 nano-ferrites
title_fullStr Structural, morphological and magnetic properties of Eu-doped CoFe2O4 nano-ferrites
title_full_unstemmed Structural, morphological and magnetic properties of Eu-doped CoFe2O4 nano-ferrites
title_sort structural, morphological and magnetic properties of eu-doped cofe2o4 nano-ferrites
publisher Elsevier
series Results in Physics
issn 2211-3797
publishDate 2017-01-01
description Europium (Eu) doped spinel cobalt ferrites having composition CoEuxFe2−xO4 where x = 0.00, 0.03, 0.06, 0.09, 0.12 were fabricated by co-precipitation route. In order to observe the phase development of the ferrite samples, thermo-gravimetric analysis was carried out. The synthesized samples were subjected to X-ray diffraction analysis for structural investigation. All the samples were found to constitute face centered cubic (FCC) spinel structure belonging to Fd3m space group. Scanning electron microscopy revealed the formation of nanocrystalline grains with spherical shape. Energy dispersive X-ray spectra confirmed the presence of Co, Eu, Fe and O elements with no existence of any impurity. The magnetic hysteresis curves measured at room temperature exhibited ferrimagnetic behavior with maximum saturation magnetization (Ms) of 65 emu/g and coercivity (Hc) of 966 Oe. The origin of ferrimagnetism in Eu doped cobalt ferrites was discussed in detail with reverence to the allocation of Co2+ and Fe3+ ions within the spinel lattice. The overall coercivity was increased (944–966 Oe) and magnetization was decreased (65–46 emu/g) with the substitution of Eu3+. The enhancement of former is ascribed to the transition from multi domain to single domain state and reduction in lateral is attributed to the incorporation of nonmagnetic Eu ions for Fe, resulting in weak superexchange interactions. Keywords: Europium doped cobalt ferrites, Co-precipitation, X-ray diffraction, Scanning electron microscopy, Magnetic properties
url http://www.sciencedirect.com/science/article/pii/S2211379717305132
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