Presentation Title

Synthesis and Structural Characterization of Doped Orthoferrite HoFe1-xVxO3

Faculty Mentor

Stephen Tsui

Start Date

18-11-2017 12:30 PM

End Date

18-11-2017 1:30 PM

Location

BSC-Ursa Minor 125

Session

Poster 2

Type of Presentation

Poster

Subject Area

physical_mathematical_sciences

Abstract

Perovskite structured compounds possess the chemical formula ABO3. This structure can be preserved upon chemical substitution, or doping, in the B cation site. We investigate the crystal structure of the doped holmium orthoferrite HoFe(1-x)VxO3 for various amounts of vanadium substitution. Holmium orthoferrite is of interest due to its change in magnetic behavior when cooling beneath a transition temperature near 40 K. Ceramic samples were synthesized by solid state reaction methods at x=0.25, x=0.5, and x=0.75 substitutions. The compounds were characterized by comparing powder X-ray diffraction data with the parent compound,HoFeO3, and precursors, to confirm the expected orthorhombic structure. Our results indicate that the the x=0.75 samples did not stabilize into this structure, likely due to excess oxygen. Alternative synthesis methods will be explored in the future to yield the x=0.75 and x=1 compound.

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

Synthesis and Structural Characterization of Doped Orthoferrite HoFe1-xVxO3

BSC-Ursa Minor 125

Perovskite structured compounds possess the chemical formula ABO3. This structure can be preserved upon chemical substitution, or doping, in the B cation site. We investigate the crystal structure of the doped holmium orthoferrite HoFe(1-x)VxO3 for various amounts of vanadium substitution. Holmium orthoferrite is of interest due to its change in magnetic behavior when cooling beneath a transition temperature near 40 K. Ceramic samples were synthesized by solid state reaction methods at x=0.25, x=0.5, and x=0.75 substitutions. The compounds were characterized by comparing powder X-ray diffraction data with the parent compound,HoFeO3, and precursors, to confirm the expected orthorhombic structure. Our results indicate that the the x=0.75 samples did not stabilize into this structure, likely due to excess oxygen. Alternative synthesis methods will be explored in the future to yield the x=0.75 and x=1 compound.