Synthesis,crystal structure refinement,electrical and magnetic properties of BaV13O18 and SrV13O18 |
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| Affiliation: | 1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai-shi, Miyagi 980-8577, Japan;2. Department of Materials Chemistry, Graduate School of Engineering, Tohoku University, Aoba-yama 07, Sendai-shi, Miyagi 980-8579, Japan;1. Department of Horticulture, College of Aburaihan, University of Tehran, Pakdasht, Tehran, Iran;2. Department of Plant Sciences, University of Jiroft, P. O. Box 364, Jiroft, Iran;1. SSN Research Centre, SSN College of Engineering, Chennai 603110, Tamil Nadu, India;2. Laser & Functional Materials Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, Madhya Pradesh, India;3. Homi Bhabha National Institute, BARC Training School Complex, Anushakti Nagar, Mumbai 400094, Maharashtra, India;4. The Cochin College, Kochi 682002, Kerala, India;1. Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, College of Physics, Jilin Normal University, Siping 136000, China;2. Department of Computer Science, Jilin Normal University, Siping 136000, China;1. Department of Physics, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan;2. Japan Synchrotron Radiation Research Institute, SPring-8, Sayo, Hyogo 679-5198, Japan;3. Department of Physics, Hiroshima University, Higashi-Hiroshima 739-8526, Japan;1. College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China;2. MARUM & Fachbereich Geowissenschaften, Universität Bremen, 28359 Bremen, Germany;3. Jiangsu National Synergetic Innovation Centre for Advanced Materials (SICAM), Nanjing 210009, China |
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| Abstract: | Polycrystalline samples of BaV13O18 and SrV13O18 were prepared by solid-state reaction of BaCO3, SrCO3, V2O5 and V at 1773–2073 K in flowing Ar. The crystal structures of BaV13O18 (R-3, ah=12.6293(10) Å, ch=7.0121(4) Å) and SrV13O18 (ah=12.5491(7) Å, ch=6.9878(3) Å) were refined by the Rietveld method using X-ray diffraction data. BaV13O18 exhibited semiconducting behavior with electrical resistivity from 5.8×10−3 to 2.7×10−3 Ω cm at 100–300 K. Electrical resistivity of SrV13O18 ranged from 1.5×10−3 to 1.8×10−3 Ω 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. BaV13O18 and SrV13O18 showed paramagnetism with the effective magnetic moment of 0.11μB and 0.15μB, respectively, at 10–100 K. |
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