Effect of Pr-doping and oxygen vacancies on spin density wave in La_{3}Ni_{2}O_{7−δ}: A µSR investigation
Here we report the positive muon spin relaxation study on Pr-doped La_{1.9}Pr_{1.1}Ni_{2}O_{6.97} and oxygen-deficient La_{3}Ni_{2}O_{6.63} polycrystalline under ambient pressure. Zero-field μ^{+}SR experiments reveal the existence of bulk long-range magnetic order in La_{1.9}Pr_{1.1}Ni_{2}O_{6.97}...
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| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2025-07-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/blkt-x2ps |
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| Summary: | Here we report the positive muon spin relaxation study on Pr-doped La_{1.9}Pr_{1.1}Ni_{2}O_{6.97} and oxygen-deficient La_{3}Ni_{2}O_{6.63} polycrystalline under ambient pressure. Zero-field μ^{+}SR experiments reveal the existence of bulk long-range magnetic order in La_{1.9}Pr_{1.1}Ni_{2}O_{6.97} with T_{N}=161K, while La_{3}Ni_{2}O_{6.63} exhibits a short-range magnetic ground state with T_{N}=15K. The microscopic magnetism of La_{1.9}Pr_{1.1}Ni_{2}O_{6.97} is similar to the La_{3}Ni_{2}O_{7} with ideal stoichiometry. A comparison with lightly oxygen-deficient La_{3}Ni_{2}O_{6.92} reveals a crossover in magnetic dimensionality from three dimensional in La_{1.9}Pr_{1.1}Ni_{2}O_{6.97} to two dimensional in La_{3}Ni_{2}O_{6.92}. Our μ^{+}SR experimental results reveal the destructive effect of apical-oxygen deficiencies on both intraplane and interplane magnetic correlation. On the other hand, Pr doping does not significantly alter the microscopic magnetism of La_{3}Ni_{2}O_{7}. |
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| ISSN: | 2643-1564 |