Effects of Oxygen Vacancy on the Magnetic Properties of Ni-Doped SnO{sub 2} Nanoparticles

Journal Article · Fri Nov 15 04:00:00 EST 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-019-5094-4· OSTI ID:22919503

Zhang, Chenchen; Zhou, Min; Zhang, Yongjia; Hao, Wentao; Sun, Li; Cao, Ensi; Yang, Zhi ^[1]

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1. Taiyuan University of Technology, College of Physics & Optoelectronics, Key Laboratory of Advanced Transducers & Intelligent Control System, Ministry of Education (China)

We studied the ferromagnetism of Ni-doped SnO{sub 2} with and without oxygen vacancy (V{sub O}) by experiments and calculations. Sn{sub 0.96}Ni{sub 0.04}O{sub 2} nanocrystalline powder prepared by the sol-gel method exhibits room-temperature ferromagnetism, and the vacuum annealing reduces its saturation magnetizations. The density functional theory (DFT) calculations show that the doped Ni atom can introduce a local magnetic moment of about 2.0 μ{sub B} in SnO{sub 2} (110) surface, which is ascribed to the spin-polarization of Ni 3d and O 2p electrons. The type of preferential magnetic coupling of Ni-doped SnO{sub 2} (110) surface depends upon the distributions of Ni dopants, and ferromagnetic coupling is more favorable in most cases. Introduction of V{sub O} obviously weakens the ferromagnetic interaction of Ni-doped SnO{sub 2} (110) surface, which can give a reasonable explanation for our experimental observations.

• OSTI ID: 22919503
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 11 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ANNEALING
COMPUTERIZED SIMULATION
CRYSTALS
DEFECTS
DENSITY FUNCTIONAL METHOD
DISTRIBUTION
DOPED MATERIALS
FERROMAGNETISM
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETIZATION
NANOPARTICLES
NANOSTRUCTURES
NICKEL ADDITIONS
SATURATION
SOL-GEL PROCESS
SPIN ORIENTATION
TIN OXIDES
VACANCIES