Mössbauer studies of Co0.5CdxFe 2.5-xO4 (0.0≤×≤0.5) ferrite

Shalendra Kumar; A. M M Farea; Khalid Mujasam Batoo; Chan Gyu Lee; B. H. Koo; Ali Yousef; Alimuddin

doi:10.1016/j.physb.2008.06.001

Mössbauer studies of Co0.5CdxFe 2.5-xO4 (0.0≤×≤0.5) ferrite

Shalendra Kumar^*, A. M M Farea, Khalid Mujasam Batoo, Chan Gyu Lee, B. H. Koo, Ali Yousef, Alimuddin

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

In the present work, we have studied the magnetic environment of Fe atoms in Cd-doped cobalt ferrite using Mössbauer spectroscopy. A series of six samples with Co_0.05Cd_xFe_2.5-xO₄ compositions (0.0≤×≤0.5) was prepared by sol-gel technique and then investigated by X-ray diffraction at room temperature and Mössbauer spectroscopy measurements in the transmission geometry at 78 K. Results of the XRD measurements indicate that all samples exhibit a single-phase cubic spinel structure. The analysis of the Mössbauer spectra shows a decrease in hyperfine magnetic field decreases at A and B site on increasing the doping of Cd ions. The appearance of the paramagnetic doublet at x = 0.5 clearly indicates that A-B super-exchange decreases due to dilution of the sub-lattice by Cd ions. The isomer shift values calculated from the fitting of the Mössbauer spectra clearly indicate that the resolved sextets in studied samples are due to Fe³⁺ ions only.

Original language	English
Pages (from-to)	3604-3607
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	403
Issue number	19-20
DOIs	https://doi.org/10.1016/j.physb.2008.06.001
Publication status	Published - Oct 1 2008

Keywords

Ferrites
Hyperfine interactions
Mössbauer spectroscopy

ASJC Scopus subject areas

Condensed Matter Physics
Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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title = "M{\"o}ssbauer studies of Co0.5CdxFe 2.5-xO4 (0.0≤×≤0.5) ferrite",

abstract = "In the present work, we have studied the magnetic environment of Fe atoms in Cd-doped cobalt ferrite using M{\"o}ssbauer spectroscopy. A series of six samples with Co0.05CdxFe2.5-xO4 compositions (0.0≤×≤0.5) was prepared by sol-gel technique and then investigated by X-ray diffraction at room temperature and M{\"o}ssbauer spectroscopy measurements in the transmission geometry at 78 K. Results of the XRD measurements indicate that all samples exhibit a single-phase cubic spinel structure. The analysis of the M{\"o}ssbauer spectra shows a decrease in hyperfine magnetic field decreases at A and B site on increasing the doping of Cd ions. The appearance of the paramagnetic doublet at x = 0.5 clearly indicates that A-B super-exchange decreases due to dilution of the sub-lattice by Cd ions. The isomer shift values calculated from the fitting of the M{\"o}ssbauer spectra clearly indicate that the resolved sextets in studied samples are due to Fe3+ ions only.",

keywords = "Ferrites, Hyperfine interactions, M{\"o}ssbauer spectroscopy",

author = "Shalendra Kumar and Farea, {A. M M} and Batoo, {Khalid Mujasam} and Lee, {Chan Gyu} and Koo, {B. H.} and Ali Yousef and Alimuddin",

year = "2008",

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doi = "10.1016/j.physb.2008.06.001",

language = "English",

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AU - Kumar, Shalendra

AU - Farea, A. M M

AU - Batoo, Khalid Mujasam

AU - Lee, Chan Gyu

AU - Koo, B. H.

AU - Yousef, Ali

AU - Alimuddin,

PY - 2008/10/1

Y1 - 2008/10/1

N2 - In the present work, we have studied the magnetic environment of Fe atoms in Cd-doped cobalt ferrite using Mössbauer spectroscopy. A series of six samples with Co0.05CdxFe2.5-xO4 compositions (0.0≤×≤0.5) was prepared by sol-gel technique and then investigated by X-ray diffraction at room temperature and Mössbauer spectroscopy measurements in the transmission geometry at 78 K. Results of the XRD measurements indicate that all samples exhibit a single-phase cubic spinel structure. The analysis of the Mössbauer spectra shows a decrease in hyperfine magnetic field decreases at A and B site on increasing the doping of Cd ions. The appearance of the paramagnetic doublet at x = 0.5 clearly indicates that A-B super-exchange decreases due to dilution of the sub-lattice by Cd ions. The isomer shift values calculated from the fitting of the Mössbauer spectra clearly indicate that the resolved sextets in studied samples are due to Fe3+ ions only.

AB - In the present work, we have studied the magnetic environment of Fe atoms in Cd-doped cobalt ferrite using Mössbauer spectroscopy. A series of six samples with Co0.05CdxFe2.5-xO4 compositions (0.0≤×≤0.5) was prepared by sol-gel technique and then investigated by X-ray diffraction at room temperature and Mössbauer spectroscopy measurements in the transmission geometry at 78 K. Results of the XRD measurements indicate that all samples exhibit a single-phase cubic spinel structure. The analysis of the Mössbauer spectra shows a decrease in hyperfine magnetic field decreases at A and B site on increasing the doping of Cd ions. The appearance of the paramagnetic doublet at x = 0.5 clearly indicates that A-B super-exchange decreases due to dilution of the sub-lattice by Cd ions. The isomer shift values calculated from the fitting of the Mössbauer spectra clearly indicate that the resolved sextets in studied samples are due to Fe3+ ions only.

KW - Ferrites

KW - Hyperfine interactions

KW - Mössbauer spectroscopy

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Mössbauer studies of Co0.5CdxFe 2.5-xO4 (0.0≤×≤0.5) ferrite

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