Aging Effects on the Structural and Magnetic Properties of Terbium–Aluminium Co-doping of Yttrium Iron Garnet Films Prepared Using the Sol–Gel Method

Ftema W. Aldbea, Efil Yusrianto, Noor Baa`Yah Ibrahim

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1 Citation (Scopus)

Abstract

The terbium–aluminium co-doped yttrium iron garnet (Tb0.2Y2.8Al1Fe4O12) nanoparticles films, prepared via a sol–gel method, were aged variously for 2 days, 3 days, 4 days and 5 days. The films were deposited on quartz substrates using a spin coating technique then annealed at 900°C in air for 2 h. The microstructural and magnetic properties of the films were measured using an x-ray diffractometer (XRD), a field emission scanning electron microscope and a vibrating sample magnetometer. The XRD results showed that all the resultant films were a single phase regardless of aging time. A change in the lattice parameter’s behavior was observed at the longer aging times. At an aging time of 5 days, the films became highly agglomerated and exhibited the greatest thickness value of 458.9 nm. The saturation magnetization, Ms, of the films decreased from 31 kA/m to 6 kA/m as the aging time was increased from 2 days to 5 days, due to the increasing Fe–O bond length resulting from larger grain sizes. The increase in aging time to 5 days caused a reduction in the coercivity, Hc, of films due to the multi-domain formation.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalJournal of Electronic Materials
DOIs
Publication statusAccepted/In press - 6 Jun 2018

Fingerprint

Yttrium
yttrium-iron garnet
Garnets
Structural properties
Magnetic properties
Iron
Aging of materials
Doping (additives)
magnetic properties
Diffractometers
diffractometers
X rays
Quartz
Coating techniques
Spin coating
Bond length
Magnetometers
Saturation magnetization
Coercive force
Field emission

Keywords

  • aging time
  • garnets
  • magnetization
  • Sol–gel method
  • thin film

ASJC Scopus subject areas

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

Cite this

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title = "Aging Effects on the Structural and Magnetic Properties of Terbium–Aluminium Co-doping of Yttrium Iron Garnet Films Prepared Using the Sol–Gel Method",
abstract = "The terbium–aluminium co-doped yttrium iron garnet (Tb0.2Y2.8Al1Fe4O12) nanoparticles films, prepared via a sol–gel method, were aged variously for 2 days, 3 days, 4 days and 5 days. The films were deposited on quartz substrates using a spin coating technique then annealed at 900°C in air for 2 h. The microstructural and magnetic properties of the films were measured using an x-ray diffractometer (XRD), a field emission scanning electron microscope and a vibrating sample magnetometer. The XRD results showed that all the resultant films were a single phase regardless of aging time. A change in the lattice parameter’s behavior was observed at the longer aging times. At an aging time of 5 days, the films became highly agglomerated and exhibited the greatest thickness value of 458.9 nm. The saturation magnetization, Ms, of the films decreased from 31 kA/m to 6 kA/m as the aging time was increased from 2 days to 5 days, due to the increasing Fe–O bond length resulting from larger grain sizes. The increase in aging time to 5 days caused a reduction in the coercivity, Hc, of films due to the multi-domain formation.",
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author = "Aldbea, {Ftema W.} and Efil Yusrianto and Ibrahim, {Noor Baa`Yah}",
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AU - Ibrahim, Noor Baa`Yah

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N2 - The terbium–aluminium co-doped yttrium iron garnet (Tb0.2Y2.8Al1Fe4O12) nanoparticles films, prepared via a sol–gel method, were aged variously for 2 days, 3 days, 4 days and 5 days. The films were deposited on quartz substrates using a spin coating technique then annealed at 900°C in air for 2 h. The microstructural and magnetic properties of the films were measured using an x-ray diffractometer (XRD), a field emission scanning electron microscope and a vibrating sample magnetometer. The XRD results showed that all the resultant films were a single phase regardless of aging time. A change in the lattice parameter’s behavior was observed at the longer aging times. At an aging time of 5 days, the films became highly agglomerated and exhibited the greatest thickness value of 458.9 nm. The saturation magnetization, Ms, of the films decreased from 31 kA/m to 6 kA/m as the aging time was increased from 2 days to 5 days, due to the increasing Fe–O bond length resulting from larger grain sizes. The increase in aging time to 5 days caused a reduction in the coercivity, Hc, of films due to the multi-domain formation.

AB - The terbium–aluminium co-doped yttrium iron garnet (Tb0.2Y2.8Al1Fe4O12) nanoparticles films, prepared via a sol–gel method, were aged variously for 2 days, 3 days, 4 days and 5 days. The films were deposited on quartz substrates using a spin coating technique then annealed at 900°C in air for 2 h. The microstructural and magnetic properties of the films were measured using an x-ray diffractometer (XRD), a field emission scanning electron microscope and a vibrating sample magnetometer. The XRD results showed that all the resultant films were a single phase regardless of aging time. A change in the lattice parameter’s behavior was observed at the longer aging times. At an aging time of 5 days, the films became highly agglomerated and exhibited the greatest thickness value of 458.9 nm. The saturation magnetization, Ms, of the films decreased from 31 kA/m to 6 kA/m as the aging time was increased from 2 days to 5 days, due to the increasing Fe–O bond length resulting from larger grain sizes. The increase in aging time to 5 days caused a reduction in the coercivity, Hc, of films due to the multi-domain formation.

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