Effect of Mn-site for al substitution on structural, electrical and magnetic properties in La0.67 Sr0.33 Mn1-x Alx O3 thin films by sol-gel method

Huda Abdullah, M. Syafiq Zulfakar, S. Kien Chen

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Nanocrystalline La0.67 Sr0.33 Mn1-x Alx O3 (x = 0.00, 0.05, 0.10, 0.15, 0.20, and 0.25) thin films have been prepared on quartz substrates by sol-gel method. The structural and morphology studies were investigated via X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM). XRD graph patterns show rhombohedral distorted perovskite structures. FESEM images show that the average grain size decreased as the concentration of x increased. Electrical property was investigated using four-point probe technique. Resistivity results show that metal-insulator transition (MIT) temperatures (T p) decreased when the concentration of x increased. T p shifted to lower temperature when the concentration of x increased. The data was analyzed based on theoretical models, where the ferromagnetic resistivity is followed with the equation ρ = ρ o + ρ 2 T 2, where ρ o is due to the significance of grain boundary effects and a second-term ρ 2 T 2 appears that might be applied to the electrons scattering. In the high temperature regime (T > T p), the resistivity data can be well described by small polaron hopping (SPH) and variable range hopping (VRH) mechanisms. Magnetic property was investigated using a vibration sample magnetometer. All samples that were obtained showed hysteresis curve with the highest value of magnetization for sample x = 0.10.

Original languageEnglish
Article number703072
JournalJournal of Nanomaterials
Volume2014
DOIs
Publication statusPublished - 2014

Fingerprint

Sol-gel process
Structural properties
Magnetic properties
Electric properties
Substitution reactions
Thin films
Field emission
Electron microscopes
Scanning
X ray diffraction
Gene Conversion
Temperature
Quartz
Metal insulator transition
Electron scattering
Magnetometers
Perovskite
Superconducting transition temperature
Hysteresis
Magnetization

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

@article{ea08bcabdb53449ca2976b4154dd08c8,
title = "Effect of Mn-site for al substitution on structural, electrical and magnetic properties in La0.67 Sr0.33 Mn1-x Alx O3 thin films by sol-gel method",
abstract = "Nanocrystalline La0.67 Sr0.33 Mn1-x Alx O3 (x = 0.00, 0.05, 0.10, 0.15, 0.20, and 0.25) thin films have been prepared on quartz substrates by sol-gel method. The structural and morphology studies were investigated via X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM). XRD graph patterns show rhombohedral distorted perovskite structures. FESEM images show that the average grain size decreased as the concentration of x increased. Electrical property was investigated using four-point probe technique. Resistivity results show that metal-insulator transition (MIT) temperatures (T p) decreased when the concentration of x increased. T p shifted to lower temperature when the concentration of x increased. The data was analyzed based on theoretical models, where the ferromagnetic resistivity is followed with the equation ρ = ρ o + ρ 2 T 2, where ρ o is due to the significance of grain boundary effects and a second-term ρ 2 T 2 appears that might be applied to the electrons scattering. In the high temperature regime (T > T p), the resistivity data can be well described by small polaron hopping (SPH) and variable range hopping (VRH) mechanisms. Magnetic property was investigated using a vibration sample magnetometer. All samples that were obtained showed hysteresis curve with the highest value of magnetization for sample x = 0.10.",
author = "Huda Abdullah and Zulfakar, {M. Syafiq} and Chen, {S. Kien}",
year = "2014",
doi = "10.1155/2014/703072",
language = "English",
volume = "2014",
journal = "Journal of Nanomaterials",
issn = "1687-4110",
publisher = "Hindawi Publishing Corporation",

}

TY - JOUR

T1 - Effect of Mn-site for al substitution on structural, electrical and magnetic properties in La0.67 Sr0.33 Mn1-x Alx O3 thin films by sol-gel method

AU - Abdullah, Huda

AU - Zulfakar, M. Syafiq

AU - Chen, S. Kien

PY - 2014

Y1 - 2014

N2 - Nanocrystalline La0.67 Sr0.33 Mn1-x Alx O3 (x = 0.00, 0.05, 0.10, 0.15, 0.20, and 0.25) thin films have been prepared on quartz substrates by sol-gel method. The structural and morphology studies were investigated via X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM). XRD graph patterns show rhombohedral distorted perovskite structures. FESEM images show that the average grain size decreased as the concentration of x increased. Electrical property was investigated using four-point probe technique. Resistivity results show that metal-insulator transition (MIT) temperatures (T p) decreased when the concentration of x increased. T p shifted to lower temperature when the concentration of x increased. The data was analyzed based on theoretical models, where the ferromagnetic resistivity is followed with the equation ρ = ρ o + ρ 2 T 2, where ρ o is due to the significance of grain boundary effects and a second-term ρ 2 T 2 appears that might be applied to the electrons scattering. In the high temperature regime (T > T p), the resistivity data can be well described by small polaron hopping (SPH) and variable range hopping (VRH) mechanisms. Magnetic property was investigated using a vibration sample magnetometer. All samples that were obtained showed hysteresis curve with the highest value of magnetization for sample x = 0.10.

AB - Nanocrystalline La0.67 Sr0.33 Mn1-x Alx O3 (x = 0.00, 0.05, 0.10, 0.15, 0.20, and 0.25) thin films have been prepared on quartz substrates by sol-gel method. The structural and morphology studies were investigated via X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM). XRD graph patterns show rhombohedral distorted perovskite structures. FESEM images show that the average grain size decreased as the concentration of x increased. Electrical property was investigated using four-point probe technique. Resistivity results show that metal-insulator transition (MIT) temperatures (T p) decreased when the concentration of x increased. T p shifted to lower temperature when the concentration of x increased. The data was analyzed based on theoretical models, where the ferromagnetic resistivity is followed with the equation ρ = ρ o + ρ 2 T 2, where ρ o is due to the significance of grain boundary effects and a second-term ρ 2 T 2 appears that might be applied to the electrons scattering. In the high temperature regime (T > T p), the resistivity data can be well described by small polaron hopping (SPH) and variable range hopping (VRH) mechanisms. Magnetic property was investigated using a vibration sample magnetometer. All samples that were obtained showed hysteresis curve with the highest value of magnetization for sample x = 0.10.

UR - http://www.scopus.com/inward/record.url?scp=84899525059&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84899525059&partnerID=8YFLogxK

U2 - 10.1155/2014/703072

DO - 10.1155/2014/703072

M3 - Article

VL - 2014

JO - Journal of Nanomaterials

JF - Journal of Nanomaterials

SN - 1687-4110

M1 - 703072

ER -