Transition of Magnetic Characteristics from Paramagnetic State to Ferromagnetic Phase in Ce{sub 1−x}Ni{sub x}O{sub 2} Nanoparticles

Journal Article · Tue May 15 00:00:00 EDT 2018 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-017-4375-Z· OSTI ID:22771298

Madhav, Peddareddygari Lalith ^[1]; Teja, K. Ravi ^[2]; Sreelekha, N. ^[3]; Reddy, D. Amaranatha ^[4]; Murali, G. ^[5]; Ramanadha, M. ^[6]

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1. National Institute of Technology, Department of Mechanical Engineering (India)
2. Raghu Engineering College, Department of Mechanical Engineering (India)
3. Raghu Engineering College, Department of Physics (India)
4. Pusan National University, Department of Chemistry and Chemical Institute for Functional Materials (Korea, Republic of)
5. Chonbuk National University, Applied Materials Institute for BIN Convergence, Department of BIN Convergence Technology and Department of Polymer-Nano Science and Technology (Korea, Republic of)
6. Sri Venkateswara University, Department of Physics (India)

Nowadays, oxide-based diluted magnetic semiconductor nanoparticles are the most reliable compounds, wherein they accommodate both spin as well as charge of the electron in single domain, means most preferable for the fabrication of spintronic devices. In this view, we report on new Ce{sub 1−x}Ni{sub x}O{sub 2} (x = 0.00, 0.02, 0.04, 0.06, and 0.08) nanoparticles prepared by precipitation method via polyethylene glycol as a surfactant. XRD analysis revealed that all the synthesized nanoparticles were crystallized in distinct FCC fluorite structure as that of CeO{sub 2} host lattice. Transmission electron microscopy analysis confirmed that all the synthesized samples were in spherical shape with average particle size of 8–10 nm, which is well concord with the grain size estimated from the Scherrer formula. The vibrating sample magnetometer evaluations suggested that pristine host lattice shows signals of paramagnetism; meanwhile, Ni substitution CeO{sub 2} nanoparticles exhibits strong ferromagnetism at room temperature. Particularly, 4% Ni-doped CeO{sub 2} samples shows enhanced ferromagnetism and which is suppressed with raising dopant concentration. The perceived magnetization with respect to the Ni dopant concentration is well anticipated by F-center exchange mechanism. We expect that the observations in this research suggest suitable path for preparing of various oxide-based diluted magnetic semiconductor nanoparticles and their applications in fabrication of spintronic devices.

• OSTI ID: 22771298
• Journal Information: Journal of Superconductivity and Novel Magnetism, Vol. 31, Issue 5; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; Article Copyright (c) 2017 Springer Science+Business Media, LLC; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CERIUM OXIDES
CONCENTRATION RATIO
DOPED MATERIALS
F CENTERS
FABRICATION
FCC LATTICES
FERROMAGNETISM
FLUORITE
GRAIN SIZE
MAGNETIC PROPERTIES
MAGNETIC SEMICONDUCTORS
MAGNETIZATION
NANOPARTICLES
NICKEL
NICKEL OXIDES
PARAMAGNETISM
PARTICLE SIZE
POLYETHYLENE GLYCOLS
PRECIPITATION
SPHERICAL CONFIGURATION
SPIN
SURFACTANTS
TEMPERATURE RANGE 0273-0400 K
TRANSMISSION ELECTRON MICROSCOPY
VIBRATING SAMPLE MAGNETOMETERS
X-RAY DIFFRACTION