Absence of itinerant ferromagnetism in a cobalt-based oxypnictide
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866929494277750784 |
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| author | Li, Hua-Xun Jiang, Hao Lin, Yi-Qiang Li, Jia-Xin Song, Shi-Jie Zhu, Qin-Qing Ren, Zhi Cao, Guang-Han |
| author_facet | Li, Hua-Xun Jiang, Hao Lin, Yi-Qiang Li, Jia-Xin Song, Shi-Jie Zhu, Qin-Qing Ren, Zhi Cao, Guang-Han |
| contents | We report a layered transition-metal-ordered oxypnictide Sr$_{2}$CrCoAsO$_{3}$. The new material was synthesized by solid-state reactions under vacuum. It has an intergrowth structure with a perovskite-like Sr$_3$Cr$_2$O$_6$ unit and ThCr$_2$Si$_2$-type SrCo$_2$As$_2$ block stacking coherently along the crystallographic $c$ axis. The measurements of electrical resistivity, magnetic susceptibility, and specific heat indicate metallic conductivity from the CoAs layers and short-range antiferromagnetic ordering in the CrO$_{2}$ planes. No itinerant-electron ferromagnetism expected in CoAs layers is observed. This result, combined with the first-principles calculations and the previous reports of other CoAs-layer-based materials, suggests that the Co$-$Co bondlength plays a crucial role in the emergence of itinerant ferromagnetism. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2409_06337 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Absence of itinerant ferromagnetism in a cobalt-based oxypnictide Li, Hua-Xun Jiang, Hao Lin, Yi-Qiang Li, Jia-Xin Song, Shi-Jie Zhu, Qin-Qing Ren, Zhi Cao, Guang-Han Materials Science Strongly Correlated Electrons We report a layered transition-metal-ordered oxypnictide Sr$_{2}$CrCoAsO$_{3}$. The new material was synthesized by solid-state reactions under vacuum. It has an intergrowth structure with a perovskite-like Sr$_3$Cr$_2$O$_6$ unit and ThCr$_2$Si$_2$-type SrCo$_2$As$_2$ block stacking coherently along the crystallographic $c$ axis. The measurements of electrical resistivity, magnetic susceptibility, and specific heat indicate metallic conductivity from the CoAs layers and short-range antiferromagnetic ordering in the CrO$_{2}$ planes. No itinerant-electron ferromagnetism expected in CoAs layers is observed. This result, combined with the first-principles calculations and the previous reports of other CoAs-layer-based materials, suggests that the Co$-$Co bondlength plays a crucial role in the emergence of itinerant ferromagnetism. |
| title | Absence of itinerant ferromagnetism in a cobalt-based oxypnictide |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2409.06337 |