Effect of increasing pH value on the structural, optical and magnetic properties of yttrium iron garnet films prepared by a sol-gel method

Ftema W. Aldbea, N. I. Ahmad, Noor Baa`Yah Ibrahim, M. Yahya

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Yttrium iron garnets (Y3Fe5O12, YIG) nanoparticles thin films with different pH values (pH 1, 2, 3, 4 and 5) were prepared by a sol-gel method. The films were deposited on quartz substrates using a spin coating technique. Annealing of the films was performed at 900°C in air for 2 h. The structural analysis using an X-ray diffractometer (XRD) exhibited that all films were single phases regardless the differences in pH value. The lattice parameters calculated from the XRD patterns revealed that the distortion of lattice occurred at a high pH value. The crystallites sizes of films also increased from 27.6 to 33.3 nm when the pH value increases from 1 to 5. The films were high agglomeration due to increasing of pH value which caused difficulty to measure the grain size. The films with different pH values showed transmission >80 % in visible range. Additionally, the absorption coefficient (α) of films was found to be of the order of 107 cm-1. A strong absorption of the films caused by charge transfer transition centered in UV and optical transitions between crystal field levels within the 3d levels of Fe3+ ions. The YIG films exhibit highest saturation magnetization value of 76 emu/cm3 at pH 1. The increment of pH value up to 5 caused a decreasing of coercive field due to multidomain formation and the easy movement of the domain walls.

Original languageEnglish
Pages (from-to)31-37
Number of pages7
JournalJournal of Sol-Gel Science and Technology
Volume71
Issue number1
DOIs
Publication statusPublished - 2014

Fingerprint

Yttrium
yttrium-iron garnet
Garnets
Sol-gel process
Structural properties
Magnetic properties
Iron
Optical properties
gels
magnetic properties
optical properties
Diffractometers
diffractometers
X rays
Quartz
Optical transitions
Coating techniques
Domain walls
Spin coating
Saturation magnetization

Keywords

  • Absorption edge
  • Magnetization
  • pH
  • Sol-gel method
  • Transmission

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Biomaterials
  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry

Cite this

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title = "Effect of increasing pH value on the structural, optical and magnetic properties of yttrium iron garnet films prepared by a sol-gel method",
abstract = "Yttrium iron garnets (Y3Fe5O12, YIG) nanoparticles thin films with different pH values (pH 1, 2, 3, 4 and 5) were prepared by a sol-gel method. The films were deposited on quartz substrates using a spin coating technique. Annealing of the films was performed at 900°C in air for 2 h. The structural analysis using an X-ray diffractometer (XRD) exhibited that all films were single phases regardless the differences in pH value. The lattice parameters calculated from the XRD patterns revealed that the distortion of lattice occurred at a high pH value. The crystallites sizes of films also increased from 27.6 to 33.3 nm when the pH value increases from 1 to 5. The films were high agglomeration due to increasing of pH value which caused difficulty to measure the grain size. The films with different pH values showed transmission >80 {\%} in visible range. Additionally, the absorption coefficient (α) of films was found to be of the order of 107 cm-1. A strong absorption of the films caused by charge transfer transition centered in UV and optical transitions between crystal field levels within the 3d levels of Fe3+ ions. The YIG films exhibit highest saturation magnetization value of 76 emu/cm3 at pH 1. The increment of pH value up to 5 caused a decreasing of coercive field due to multidomain formation and the easy movement of the domain walls.",
keywords = "Absorption edge, Magnetization, pH, Sol-gel method, Transmission",
author = "Aldbea, {Ftema W.} and Ahmad, {N. I.} and Ibrahim, {Noor Baa`Yah} and M. Yahya",
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T1 - Effect of increasing pH value on the structural, optical and magnetic properties of yttrium iron garnet films prepared by a sol-gel method

AU - Aldbea, Ftema W.

AU - Ahmad, N. I.

AU - Ibrahim, Noor Baa`Yah

AU - Yahya, M.

PY - 2014

Y1 - 2014

N2 - Yttrium iron garnets (Y3Fe5O12, YIG) nanoparticles thin films with different pH values (pH 1, 2, 3, 4 and 5) were prepared by a sol-gel method. The films were deposited on quartz substrates using a spin coating technique. Annealing of the films was performed at 900°C in air for 2 h. The structural analysis using an X-ray diffractometer (XRD) exhibited that all films were single phases regardless the differences in pH value. The lattice parameters calculated from the XRD patterns revealed that the distortion of lattice occurred at a high pH value. The crystallites sizes of films also increased from 27.6 to 33.3 nm when the pH value increases from 1 to 5. The films were high agglomeration due to increasing of pH value which caused difficulty to measure the grain size. The films with different pH values showed transmission >80 % in visible range. Additionally, the absorption coefficient (α) of films was found to be of the order of 107 cm-1. A strong absorption of the films caused by charge transfer transition centered in UV and optical transitions between crystal field levels within the 3d levels of Fe3+ ions. The YIG films exhibit highest saturation magnetization value of 76 emu/cm3 at pH 1. The increment of pH value up to 5 caused a decreasing of coercive field due to multidomain formation and the easy movement of the domain walls.

AB - Yttrium iron garnets (Y3Fe5O12, YIG) nanoparticles thin films with different pH values (pH 1, 2, 3, 4 and 5) were prepared by a sol-gel method. The films were deposited on quartz substrates using a spin coating technique. Annealing of the films was performed at 900°C in air for 2 h. The structural analysis using an X-ray diffractometer (XRD) exhibited that all films were single phases regardless the differences in pH value. The lattice parameters calculated from the XRD patterns revealed that the distortion of lattice occurred at a high pH value. The crystallites sizes of films also increased from 27.6 to 33.3 nm when the pH value increases from 1 to 5. The films were high agglomeration due to increasing of pH value which caused difficulty to measure the grain size. The films with different pH values showed transmission >80 % in visible range. Additionally, the absorption coefficient (α) of films was found to be of the order of 107 cm-1. A strong absorption of the films caused by charge transfer transition centered in UV and optical transitions between crystal field levels within the 3d levels of Fe3+ ions. The YIG films exhibit highest saturation magnetization value of 76 emu/cm3 at pH 1. The increment of pH value up to 5 caused a decreasing of coercive field due to multidomain formation and the easy movement of the domain walls.

KW - Absorption edge

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