Synthesis, crystal structure refinement, electrical and magnetic properties of BaV{sub 13}O{sub 18} and SrV{sub 13}O{sub 18}

Journal Article · Wed Jan 01 04:00:00 EST 2003 · Materials Research Bulletin

DOI:https://doi.org/10.1016/S0025-5408(02)00978-9· OSTI ID:20883134

Iwasaki, Kouta; Takizawa, Hirotsugu; Yamane, Hisanori; Kubota, Shunichi; Takahashi, Junichi; Uheda, Kyota; Endo, Tadashi

Polycrystalline samples of BaV{sub 13}O{sub 18} and SrV{sub 13}O{sub 18} were prepared by solid-state reaction of BaCO{sub 3}, SrCO{sub 3}, V{sub 2}O{sub 5} and V at 1773-2073 K in flowing Ar. The crystal structures of BaV{sub 13}O{sub 18} (R-3, a{sub h}=12.6293(10) A, c{sub h}=7.0121(4) A) and SrV{sub 13}O{sub 18} (a{sub h}=12.5491(7) A, c{sub h}=6.9878(3) A) were refined by the Rietveld method using X-ray diffraction data. BaV{sub 13}O{sub 18} exhibited semiconducting behavior with electrical resistivity from 5.8x10{sup -3} to 2.7x10{sup -3} {omega} cm at 100-300 K. Electrical resistivity of SrV{sub 13}O{sub 18} ranged from 1.5x10{sup -3} to 1.8x10{sup -3} {omega} cm, and it increased slightly up to around 250 K and decreased above 250 K with increasing temperature. Negative Seebeck coefficients of both compounds at 100-300 K indicated that electron was the dominant carrier. BaV{sub 13}O{sub 18} and SrV{sub 13}O{sub 18} showed paramagnetism with the effective magnetic moment of 0.11{mu}{sub B} and 0.15{mu}{sub B}, respectively, at 10-100 K.

• OSTI ID: 20883134
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 1 Vol. 38; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM CARBONATES
CHEMICAL PREPARATION
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
PARAMAGNETISM
POLYCRYSTALS
STRONTIUM CARBONATES
VANADATES
VANADIUM OXIDES
X-RAY DIFFRACTION