Factors controlling phase formation of novel Sr-based Y-type hexagonal ferrite nanoparticles

R. Tholkappiyan; K. Vishista; Fathalla Hamed

doi:10.1007/s12043-016-1325-4

Factors controlling phase formation of novel Sr-based Y-type hexagonal ferrite nanoparticles

R. Tholkappiyan, K. Vishista, Fathalla Hamed

Department of Physics

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

16 Citations (Scopus)

Abstract

New Sr-based Y-type nanocrystalline hexagonal ferrites with a nominal chemical composition of Sr₂Mg₂Fe₁₂O₂₂ (Sr₂Y) were prepared by autocombustion from mixtures of Sr(NO₃)₂, Mg(NO₃)₂·6H₂O and Fe(NO₃)₃·9H₂O. The newly prepared Sr₂Y nanocrystalline particles were characterized by powder X-ray diffraction (XRD). A well crystalline phase of Sr₂Y with hexagonal crystal structure was observed. Fourier transform infrared spectroscopy (FTIR) studies revealed the information about the positions of the ions and their bonds within the lattice structure of the Sr₂Y. The chemical elements and their oxidation states in the Sr₂Y hexaferrites were determined using X-ray photoelectron spectroscopy (XPS). The XRD, FTIR and XPS studies confirmed the formation of Sr₂Mg₂Fe₁₂O₂₂ hexaferrites. The morphology and porosity of the prepared Sr₂Y nanocrystalline Sr₂Y hexaferrite particles were studied by field emission scanning electron microscopy. The magnetic properties of Sr₂Y hexaferrites showed dependence on the methods of preparation conditions and calcination treatments. The values of coercivity, saturation magnetization and retentivity were in the range of 21.33-19.66 kA m^-1, 42.44-38.72 emu g^-1 and 10.05-13.19 emu g^-1 respectively.

Original language	English
Article number	27
Journal	Pramana - Journal of Physics
Volume	88
Issue number	2
DOIs	https://doi.org/10.1007/s12043-016-1325-4
Publication status	Published - Feb 2017

Keywords

Combustion process
Glycine
Hexagonal ferrites
Oxidation state
X-ray photoelectron spectroscopy

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1007/s12043-016-1325-4

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title = "Factors controlling phase formation of novel Sr-based Y-type hexagonal ferrite nanoparticles",

abstract = "New Sr-based Y-type nanocrystalline hexagonal ferrites with a nominal chemical composition of Sr2Mg2Fe12O22 (Sr2Y) were prepared by autocombustion from mixtures of Sr(NO3)2, Mg(NO3)2·6H2O and Fe(NO3)3·9H2O. The newly prepared Sr2Y nanocrystalline particles were characterized by powder X-ray diffraction (XRD). A well crystalline phase of Sr2Y with hexagonal crystal structure was observed. Fourier transform infrared spectroscopy (FTIR) studies revealed the information about the positions of the ions and their bonds within the lattice structure of the Sr2Y. The chemical elements and their oxidation states in the Sr2Y hexaferrites were determined using X-ray photoelectron spectroscopy (XPS). The XRD, FTIR and XPS studies confirmed the formation of Sr2Mg2Fe12O22 hexaferrites. The morphology and porosity of the prepared Sr2Y nanocrystalline Sr2Y hexaferrite particles were studied by field emission scanning electron microscopy. The magnetic properties of Sr2Y hexaferrites showed dependence on the methods of preparation conditions and calcination treatments. The values of coercivity, saturation magnetization and retentivity were in the range of 21.33-19.66 kA m-1, 42.44-38.72 emu g-1 and 10.05-13.19 emu g-1 respectively.",

keywords = "Combustion process, Glycine, Hexagonal ferrites, Oxidation state, X-ray photoelectron spectroscopy",

author = "R. Tholkappiyan and K. Vishista and Fathalla Hamed",

note = "Publisher Copyright: {\textcopyright} Indian Academy of Sciences.",

year = "2017",

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doi = "10.1007/s12043-016-1325-4",

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T1 - Factors controlling phase formation of novel Sr-based Y-type hexagonal ferrite nanoparticles

AU - Tholkappiyan, R.

AU - Vishista, K.

AU - Hamed, Fathalla

N1 - Publisher Copyright: © Indian Academy of Sciences.

PY - 2017/2

Y1 - 2017/2

N2 - New Sr-based Y-type nanocrystalline hexagonal ferrites with a nominal chemical composition of Sr2Mg2Fe12O22 (Sr2Y) were prepared by autocombustion from mixtures of Sr(NO3)2, Mg(NO3)2·6H2O and Fe(NO3)3·9H2O. The newly prepared Sr2Y nanocrystalline particles were characterized by powder X-ray diffraction (XRD). A well crystalline phase of Sr2Y with hexagonal crystal structure was observed. Fourier transform infrared spectroscopy (FTIR) studies revealed the information about the positions of the ions and their bonds within the lattice structure of the Sr2Y. The chemical elements and their oxidation states in the Sr2Y hexaferrites were determined using X-ray photoelectron spectroscopy (XPS). The XRD, FTIR and XPS studies confirmed the formation of Sr2Mg2Fe12O22 hexaferrites. The morphology and porosity of the prepared Sr2Y nanocrystalline Sr2Y hexaferrite particles were studied by field emission scanning electron microscopy. The magnetic properties of Sr2Y hexaferrites showed dependence on the methods of preparation conditions and calcination treatments. The values of coercivity, saturation magnetization and retentivity were in the range of 21.33-19.66 kA m-1, 42.44-38.72 emu g-1 and 10.05-13.19 emu g-1 respectively.

AB - New Sr-based Y-type nanocrystalline hexagonal ferrites with a nominal chemical composition of Sr2Mg2Fe12O22 (Sr2Y) were prepared by autocombustion from mixtures of Sr(NO3)2, Mg(NO3)2·6H2O and Fe(NO3)3·9H2O. The newly prepared Sr2Y nanocrystalline particles were characterized by powder X-ray diffraction (XRD). A well crystalline phase of Sr2Y with hexagonal crystal structure was observed. Fourier transform infrared spectroscopy (FTIR) studies revealed the information about the positions of the ions and their bonds within the lattice structure of the Sr2Y. The chemical elements and their oxidation states in the Sr2Y hexaferrites were determined using X-ray photoelectron spectroscopy (XPS). The XRD, FTIR and XPS studies confirmed the formation of Sr2Mg2Fe12O22 hexaferrites. The morphology and porosity of the prepared Sr2Y nanocrystalline Sr2Y hexaferrite particles were studied by field emission scanning electron microscopy. The magnetic properties of Sr2Y hexaferrites showed dependence on the methods of preparation conditions and calcination treatments. The values of coercivity, saturation magnetization and retentivity were in the range of 21.33-19.66 kA m-1, 42.44-38.72 emu g-1 and 10.05-13.19 emu g-1 respectively.

KW - Combustion process

KW - Glycine

KW - Hexagonal ferrites

KW - Oxidation state

KW - X-ray photoelectron spectroscopy

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Factors controlling phase formation of novel Sr-based Y-type hexagonal ferrite nanoparticles

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