Structure, Magnetism, and Valence States of Cobalt and Platinum in Quasi-One-Dimensional Oxides A3CoPtO6 with A = Ca, Sr
Two quasi-one-dimensional oxides, Ca3CoPtO6 and Sr3CoPtO6, were synthesized and characterized. A combination of X-ray absorption spectroscopy at the Co-K-, Co-L2,3-, and Pt-L3-edges and X-ray photoelectron spectroscopy establishes unambiguously the divalent state of Co and the tetravalent state of P...
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| Veröffentlicht in: | Journal of physical chemistry. C 2014-03, Vol.118 (10), p.5463-5469 |
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| container_title | Journal of physical chemistry. C |
| container_volume | 118 |
| creator | Mikhailova, D Kuo, C. Y Reichel, P Tsirlin, A. A Efimenko, A Rotter, M Schmidt, M Hu, Z Pi, T. W Jang, L. Y Soo, Y. L Oswald, S Tjeng, L. H |
| description | Two quasi-one-dimensional oxides, Ca3CoPtO6 and Sr3CoPtO6, were synthesized and characterized. A combination of X-ray absorption spectroscopy at the Co-K-, Co-L2,3-, and Pt-L3-edges and X-ray photoelectron spectroscopy establishes unambiguously the divalent state of Co and the tetravalent state of Pt in both compounds, in contrast to the earlier assumption of the Co3+ and mixed Pt2+/Pt4+ valence states. Magnetization measurements reveal the paramagnetic behavior down to 2 K with strong evidence for an unquenched orbital moment of the high-spin Co2+. The simple paramagnetic behavior of A3CoPtO6 contrasts with the magnetic transitions observed in Ca3CoRhO6, Sr3CoIrO6, and other isostructural materials. This difference is ascribed to the nonmagnetic 5d6 state of Pt4+ that prevents magnetic couplings between the Co2+ ions. |
| doi_str_mv | 10.1021/jp411503s |
| format | Article |
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Y ; Reichel, P ; Tsirlin, A. A ; Efimenko, A ; Rotter, M ; Schmidt, M ; Hu, Z ; Pi, T. W ; Jang, L. Y ; Soo, Y. L ; Oswald, S ; Tjeng, L. H</creator><creatorcontrib>Mikhailova, D ; Kuo, C. Y ; Reichel, P ; Tsirlin, A. A ; Efimenko, A ; Rotter, M ; Schmidt, M ; Hu, Z ; Pi, T. W ; Jang, L. Y ; Soo, Y. L ; Oswald, S ; Tjeng, L. H</creatorcontrib><description>Two quasi-one-dimensional oxides, Ca3CoPtO6 and Sr3CoPtO6, were synthesized and characterized. A combination of X-ray absorption spectroscopy at the Co-K-, Co-L2,3-, and Pt-L3-edges and X-ray photoelectron spectroscopy establishes unambiguously the divalent state of Co and the tetravalent state of Pt in both compounds, in contrast to the earlier assumption of the Co3+ and mixed Pt2+/Pt4+ valence states. Magnetization measurements reveal the paramagnetic behavior down to 2 K with strong evidence for an unquenched orbital moment of the high-spin Co2+. The simple paramagnetic behavior of A3CoPtO6 contrasts with the magnetic transitions observed in Ca3CoRhO6, Sr3CoIrO6, and other isostructural materials. This difference is ascribed to the nonmagnetic 5d6 state of Pt4+ that prevents magnetic couplings between the Co2+ ions.</description><identifier>ISSN: 1932-7447</identifier><identifier>EISSN: 1932-7455</identifier><identifier>DOI: 10.1021/jp411503s</identifier><language>eng</language><publisher>American Chemical Society</publisher><ispartof>Journal of physical chemistry. 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The simple paramagnetic behavior of A3CoPtO6 contrasts with the magnetic transitions observed in Ca3CoRhO6, Sr3CoIrO6, and other isostructural materials. This difference is ascribed to the nonmagnetic 5d6 state of Pt4+ that prevents magnetic couplings between the Co2+ ions.</description><issn>1932-7447</issn><issn>1932-7455</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid/><recordid>eNo9kMtOwzAURC0EEqWw4A_uhl0Ddv1IsmBRhadUlKIA2-jGscFV6qDYEf18ykNdzUijGY0OIeeMXjI6Z1frT8GYpDwckAnL-TxJhZSHey_SY3ISwppSySnjE7Kt4jDqOA5mBk_47k10YTMD9C28YWe8NlBFjCZAb6HoG-zib7jqMDo_bsB5eB4xuKT0JrlxG-OD6z12UG5du6steNGvYqngy8UPWMA1FDiDajglRxa7YM7-dUpe725fiodkWd4_FotlgozSmORSKMsMorWizaSyc51bpI1AkWnVSNakJlfapEppLkzGtbFcZLmkKFJOBZ-Si79d1KFe9-Ow-xZqRusfXPUeF_8GGIFcGw</recordid><startdate>20140313</startdate><enddate>20140313</enddate><creator>Mikhailova, D</creator><creator>Kuo, C. 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C</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mikhailova, D</au><au>Kuo, C. Y</au><au>Reichel, P</au><au>Tsirlin, A. A</au><au>Efimenko, A</au><au>Rotter, M</au><au>Schmidt, M</au><au>Hu, Z</au><au>Pi, T. W</au><au>Jang, L. Y</au><au>Soo, Y. L</au><au>Oswald, S</au><au>Tjeng, L. H</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Structure, Magnetism, and Valence States of Cobalt and Platinum in Quasi-One-Dimensional Oxides A3CoPtO6 with A = Ca, Sr</atitle><jtitle>Journal of physical chemistry. C</jtitle><addtitle>J. Phys. Chem. C</addtitle><date>2014-03-13</date><risdate>2014</risdate><volume>118</volume><issue>10</issue><spage>5463</spage><epage>5469</epage><pages>5463-5469</pages><issn>1932-7447</issn><eissn>1932-7455</eissn><abstract>Two quasi-one-dimensional oxides, Ca3CoPtO6 and Sr3CoPtO6, were synthesized and characterized. A combination of X-ray absorption spectroscopy at the Co-K-, Co-L2,3-, and Pt-L3-edges and X-ray photoelectron spectroscopy establishes unambiguously the divalent state of Co and the tetravalent state of Pt in both compounds, in contrast to the earlier assumption of the Co3+ and mixed Pt2+/Pt4+ valence states. Magnetization measurements reveal the paramagnetic behavior down to 2 K with strong evidence for an unquenched orbital moment of the high-spin Co2+. The simple paramagnetic behavior of A3CoPtO6 contrasts with the magnetic transitions observed in Ca3CoRhO6, Sr3CoIrO6, and other isostructural materials. This difference is ascribed to the nonmagnetic 5d6 state of Pt4+ that prevents magnetic couplings between the Co2+ ions.</abstract><pub>American Chemical Society</pub><doi>10.1021/jp411503s</doi><tpages>7</tpages></addata></record> |
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| title | Structure, Magnetism, and Valence States of Cobalt and Platinum in Quasi-One-Dimensional Oxides A3CoPtO6 with A = Ca, Sr |
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