Tunable Optical Behaviour and Room Temperature Ferromagnetism of Cobalt-Doped BaSnO{sub 3} Nanostructures

Journal Article · Sat Sep 15 04:00:00 EDT 2018 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-017-4504-8· OSTI ID:22773824

Jaya, N. Victor ^[1]

---

1. Anna University, High Pressure and Nanoscience Laboratory, Department of Physics (India)

In this work, the effect of Co doping on the structural, vibrational, morphological, optical and magnetic behaviour of BaSnO{sub 3} nanostructures is reported. Pure and Co (1,3, and 5%)-doped barium stannate (BSO) nanostructures were prepared by conventional hydrothermal technique followed by calcination at 900 °C for 5 h. The single crystalline cubic phase was identified by XRD analysis and structural distortions associated with Co doping were evidenced by variation in microstarin and crystallite size. FTIR and Raman studies further confirm the structural quality of the prepared samples. FESEM analysis revealed the mixed morphology of prepared samples, and the chemical compositions of all the samples were analysed using EDAX studies. The absorption studies revealed the incorporation of dopant ions and their effect on the bandgap subsequently in samples. The presence of defects and paramagnetic centres in the samples were confirmed by PL and EPR analyses. Magnetization studies demonstrated that pure BSO exhibits characteristic diamagnetism at room temperature and the addition of Co into Ba–Sn–O lattice drives the F-centre exchange interactions which results in the ferromagnetic behaviour. Hence, the occurrence of diamagnetic to ferromagnetic transition at room temperature with addition of Co as a dopant was identified.

• OSTI ID: 22773824
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 9 Vol. 31; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM COMPOUNDS
CALCINATION
CHEMICAL COMPOSITION
COBALT
DIAMAGNETISM
DOPED MATERIALS
ELECTRON SPIN RESONANCE
EXCHANGE INTERACTIONS
F CENTERS
FERROMAGNETISM
FOURIER TRANSFORM SPECTROMETERS
MAGNETIZATION
MONOCRYSTALS
MORPHOLOGY
NANOSTRUCTURES
PARAMAGNETISM
RAMAN SPECTROSCOPY
SEMICONDUCTOR MATERIALS
STANNATES
TEMPERATURE RANGE 0273-0400 K
X-RAY DIFFRACTION