Presentation Title

Comparison Between V2O5 and VO2 Precursors in the Synthesis of HoV1-xFexO3

Faculty Mentor

Stephen Tsui

Start Date

18-11-2017 12:30 PM

End Date

18-11-2017 1:30 PM

Location

BSC-Ursa Minor 131

Session

Poster 2

Type of Presentation

Poster

Subject Area

physical_mathematical_sciences

Abstract

Comparison Between V2O5 and VO2 Precursors in the Synthesis of HoV1-xFe xO3

We investigate the synthesis and magnetic behavior of the orthoferrivanadate compound HoV1-xFexO3, a chemically doped variant of HoFeO3 which is known to have an electronic spin reorientation transition at low temperature. Complications can arise in trying to concurrently stabilize a reduced V3+ cation with the oxidized Fe3+ cation, so we investigate the consequences of substituting V3+ using two different vanadium precursors: V2O5 and VO2 to create the HoFe0.5V0.5 O3. The polycrystalline compounds were prepared by solid state reaction method using purity > 99% powders of Ho2O3, Fe2O3 , VO2 , and V2O5. The materials were ground via mortar and pestle, hydraulically pressed into pellets, and sintered at 1200o C and then 1400o C. Additional complications can arise due to the possible vanadium oxidation states of V2+,V4+ , and V5+. The crystal structure was obtained using X-ray diffraction, and the magnetic properties were characterized via vibrating sample magnetometry.

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Nov 18th, 12:30 PM Nov 18th, 1:30 PM

Comparison Between V2O5 and VO2 Precursors in the Synthesis of HoV1-xFexO3

BSC-Ursa Minor 131

Comparison Between V2O5 and VO2 Precursors in the Synthesis of HoV1-xFe xO3

We investigate the synthesis and magnetic behavior of the orthoferrivanadate compound HoV1-xFexO3, a chemically doped variant of HoFeO3 which is known to have an electronic spin reorientation transition at low temperature. Complications can arise in trying to concurrently stabilize a reduced V3+ cation with the oxidized Fe3+ cation, so we investigate the consequences of substituting V3+ using two different vanadium precursors: V2O5 and VO2 to create the HoFe0.5V0.5 O3. The polycrystalline compounds were prepared by solid state reaction method using purity > 99% powders of Ho2O3, Fe2O3 , VO2 , and V2O5. The materials were ground via mortar and pestle, hydraulically pressed into pellets, and sintered at 1200o C and then 1400o C. Additional complications can arise due to the possible vanadium oxidation states of V2+,V4+ , and V5+. The crystal structure was obtained using X-ray diffraction, and the magnetic properties were characterized via vibrating sample magnetometry.