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 language | English |
|---|---|
| Article number | 703072 |
| Journal | Journal of Nanomaterials |
| Volume | 2014 |
| DOIs | |
| Publication status | Published - 2014 |
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ASJC Scopus subject areas
- Materials Science(all)
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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. / Abdullah, Huda; Zulfakar, M. Syafiq; Chen, S. Kien.
In: Journal of Nanomaterials, Vol. 2014, 703072, 2014.Research output: Contribution to journal › Article
}
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
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U2 - 10.1155/2014/703072
DO - 10.1155/2014/703072
M3 - Article
AN - SCOPUS:84899525059
VL - 2014
JO - Journal of Nanomaterials
JF - Journal of Nanomaterials
SN - 1687-4110
M1 - 703072
ER -