Structural, magnetic and optical properties of a dilute magnetic semiconductor based on Ce{sub 1−x}Co{sub x}O{sub 2} thin film grown on LaAlO{sub 3}

Journal Article · Tue Dec 15 00:00:00 EST 2015 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2015.07.044· OSTI ID:22584227

Al-Ghamdi, A. A. ^[1]; Al-Agel, F. A. ^[2]; Al-Arfaj, E. ^[3]; Shokr, F. S. ^[4]; Al-Gahtany, S. A. ^[5]; Alshahrie, Ahmed ^[1]; Jalled, Ouissem ^[1]; Bronstein, L. M. ^[1]; Beall, Gary W. ^[1]

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1. King Abdulaziz University, Faculty of Science, Department of Physics, Jeddah (Saudi Arabia)
2. Hail University, College of Science, Department of Physics, Hail (Saudi Arabia)
3. Umm Alqura University, Department of Physics, Makkah (Saudi Arabia)
4. King Abdulaziz University, Faculty of Science & Arts, Department of Physics, Rabigh (Saudi Arabia)
5. King Abdulaziz University, Faculty of Science for Girls, Department of Physics, Jeddah (Saudi Arabia)

Highlights: • Co doped CeO{sub 2} was grown on LaAlO{sub 3} (0 0 1) via a modified sol–gel spin-coating technique. • The concentration of the Co ions was varied from 1 to 15 at.%. • The incorporation of 5 at.% of Mn ions was found to provide formation of exceptionally magnetic moment. • This amount demonstrated a giant magnetic moment of 1.09 μ{sub B}/Co. • This amount reduced the optical band gap and enhanced the optical performance. - Abstract: The enhancement of the room temperature ferromagnetism and optical properties of the dilute magnetic metal oxides is a crucial clue to construct spin-based optoelectronic devices. In this work, Ce{sub 1−x}Co{sub x}O{sub 2} (0.01 ≤ x ≤0.15) thin films were prepared via ethylene glycol modified sol–gel spin coating technique on the LaAlO{sub 3} (0 0 1) substrate to enhance their room temperature ferromagnetism and optical properties. The structures, magnetic and optical properties of the prepared films were characterized by X-ray diffraction, atomic force microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, SQUID magnetometer, X-ray photoelectron spectroscopy and UV–vis spectrophotometer. The results demonstrated that a single phase cubic structure was formed, implying the substitution of Co ions into the Ce ions sites. The prepared films showed room temperature ferromagnetism with saturation magnetic moment of 1.09 μ{sub B}/Co was achieved for 5 at.% Co-doped CeO{sub 2}. This film exhibited high optical transparency of 85% and low optical band energy gap of 3.39 eV. The improved magnetic and optical properties are argued to the increase of the density of the oxygen vacancies into the cerium oxide crystal structure due to the incorporation of Co ions.

• OSTI ID: 22584227
• Journal Information: Materials Research Bulletin, Vol. 72; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINATES
ATOMIC FORCE MICROSCOPY
CERIUM OXIDES
COBALT IONS
DOPED MATERIALS
FERROMAGNETISM
LANTHANUM COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIC SEMICONDUCTORS
OPACITY
SCANNING ELECTRON MICROSCOPY
SOL-GEL PROCESS
SPIN-ON COATING
SQUID DEVICES
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
VACANCIES
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY
X-RAY SPECTROSCOPY