Metal-insulator transition in CaV1-xWxO3 (x=0.1-0.33) perovskites
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866910765958561792 |
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| author | Morozov, I. V. Shamova, I. K. Yusifov, M. A. Istomin, S. Y. Shatalova, T. B. Boltalin, A. I. Andreev, A. A. Chumakov, R. G. Vasilchikova, T. M. Fedorova, A. A. Ovchenkov, E. A. Volkova, O. S. |
| author_facet | Morozov, I. V. Shamova, I. K. Yusifov, M. A. Istomin, S. Y. Shatalova, T. B. Boltalin, A. I. Andreev, A. A. Chumakov, R. G. Vasilchikova, T. M. Fedorova, A. A. Ovchenkov, E. A. Volkova, O. S. |
| contents | Novel CaV1-xWxO3 (0.1 < x < 0.33) oxides with an orthorhombically distorted perovskite structure of GdFeO3 type have been synthesized. These compounds contain in B-position W+6 and V cations in an oxidation state between +4 (CaVO3) and +3 (x=0.33). CaV0.9W0.1O3 compound possesses metallic type of conductivity and Pauli paramagnetism. The intermediate compositions are between bad metal and semiconducting type of behavior with paramagnetic response. CaV0.67W0.33O3 is a Mott insulator with localized V+3 moments coupled by strong antiferromagnetic interactions. It demonstrates the reduction of effective magnetic moment at high temperatures and canonical spin glass state formation with the freezing temperature Tg = 27.5 K seen in dc - and ac - magnetic susceptibility. Disorder in the magnetic subsystem induces a broad peak in magnetic contribution of the heat capacity at Tmax = 46 K. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_00443 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Metal-insulator transition in CaV1-xWxO3 (x=0.1-0.33) perovskites Morozov, I. V. Shamova, I. K. Yusifov, M. A. Istomin, S. Y. Shatalova, T. B. Boltalin, A. I. Andreev, A. A. Chumakov, R. G. Vasilchikova, T. M. Fedorova, A. A. Ovchenkov, E. A. Volkova, O. S. Materials Science Novel CaV1-xWxO3 (0.1 < x < 0.33) oxides with an orthorhombically distorted perovskite structure of GdFeO3 type have been synthesized. These compounds contain in B-position W+6 and V cations in an oxidation state between +4 (CaVO3) and +3 (x=0.33). CaV0.9W0.1O3 compound possesses metallic type of conductivity and Pauli paramagnetism. The intermediate compositions are between bad metal and semiconducting type of behavior with paramagnetic response. CaV0.67W0.33O3 is a Mott insulator with localized V+3 moments coupled by strong antiferromagnetic interactions. It demonstrates the reduction of effective magnetic moment at high temperatures and canonical spin glass state formation with the freezing temperature Tg = 27.5 K seen in dc - and ac - magnetic susceptibility. Disorder in the magnetic subsystem induces a broad peak in magnetic contribution of the heat capacity at Tmax = 46 K. |
| title | Metal-insulator transition in CaV1-xWxO3 (x=0.1-0.33) perovskites |
| topic | Materials Science |
| url | https://arxiv.org/abs/2410.00443 |