Thermal plasma processed ferro-magnetically ordered face-centered cubic iron at room temperature

Abstract

Articles you may be interested inDistinguishing magnetic particle size of iron oxide nanoparticles with first-order reversal curves Role of inhomogeneous cation distribution in magnetic enhancement of nanosized Ni0.35Zn0.65Fe2O4: A structural, magnetic, and hyperfine studyHere, we report tailor made phase of iron nanoparticles using homogeneous gas phase condensation process via thermal plasma route. It was observed that crystal lattice of nanocrystalline iron changes as a function of operating parameters of the plasma reactor. In the present investigation iron nanoparticles have been synthesized in presence of argon at operating pressures of 125-1000 Torr and fixed plasma input DC power of 6 kW. It was possible to obtain pure fcc, pure bcc as well as the mixed phases for iron nanoparticles in powder form as a function of operating pressure. The as synthesized product was characterized for understanding the structural and magnetic properties by using X-ray diffraction, vibrating sample magnetometer, and M€ ossbauer spectroscopy. The data reveal that fcc phase is ferromagnetically ordered with high spin state, which is unusual whereas bcc phase is found to be ferromagnetic as usual. Finally, the structural and magnetic properties are co-related. V C 2014 AIP Publishing LLC.

Electronic Structure of Visible Light-Driven Photocatalyst δ-Bi11VO19 Nanoparticles Synthesized by Thermal Plasma

“…This process gives a clean reaction atmosphere, which is essential for the synthesis of high purity compounds. It also provides high enthalpy which increases the reaction kinetics by several orders of magnitude and abrupt temperature gradient that make rapid quenching and generation of fine nanoparticles easily possible . In the present study, we have adopted the approach of synthesizing high-temperature δ phase of Bi 11 VO 19 nanoparticles using the thermal plasma method.…”

Phase tuning of a thermal plasma synthesized cobalt oxide catalyst and understanding of its surface modification during the hydrolysis of NaBH4

“…In addition, the thermal plasma route for nanoparticle synthesis can also tune phase, morphology, surface and other pro- Dalton Transactions Paper perties using plasma operating parameters. [24][25][26][27][28] Our group have previously reported that the surface properties of thermal plasma synthesized spinel ferrite nanoparticles are quite different from that of the same composition obtained using chemical methods. 24 However, there are not many reports on the catalytic performance of thermal plasma synthesized catalysts.…”