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Evidence for a low-spin to intermediate-spin state transition inLaCoO3
Open accessAbstract
We present measurements of the magnetic susceptibility and of the thermal expansion of a ${\mathrm{LaCoO}}_{3}$ single crystal. Both quantities show a strongly anomalous temperature dependence. Our data are consistently described in terms of a spin-state transition of the ${\mathrm{Co}}^{3+}$ ions with increasing temperature from a low-spin ground state ${(t}_{2g}^{6}{e}_{g}^{0})$ to an intermediate-spin state ${(t}_{2g}^{5}{e}_{g}^{1})$ without (100--500 K) and with $(>500 \mathrm{K})$ orbital degeneracy. We attribute the lack of orbital degeneracy up to 500 K to (probably local) Jahn-Teller distortions of the ${\mathrm{CoO}}_{6}$ octahedra. A strong reduction or disappearance of the Jahn-Teller distortions seems to arise from the insulator-to-metal transition around 500 K.
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Cites
Shannon, R. D. (1976) · Acta Crystallographica Section A · doi:10.1107/s0567739476001551 · Cited by 66,145
Cited by
Zhou, S., Miao, X., Zhao, X., Ma, C., Qiu, Y., Hu, Z., Zhao, J., Shi, L., & Zeng, J. (2016) · Nature Communications · doi:10.1038/ncomms11510 · Cited by 508
Metadata
- Authors
- Zobel, C., Kriener, M., Bruns, D., Baier, J., Grüninger, M., Lorenz, T., Reutler, P., & Revcolevschi, A.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 2002-06-26
- Volume
- 66
- Issue
- 2
- ISSN
- 0163-1829 (ISSN-L)
- 1095-3795
- OpenAlex
- W1977696859
- Cited by
- 350
- References
- 1
- FWCI
- 11.01
- Type
- journal article
- Language
- en
- Open access
- green
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- CoChat. (2026). Citation check: Evidence for a low-spin to intermediate-spin state transition inLaCoO3. https://app.cochat.ai/papers/10.1103/physrevb.66.020402
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- Zobel, C., Kriener, M., Bruns, D., Baier, J., Grüninger, M., Lorenz, T., Reutler, P., & Revcolevschi, A. (2002). Evidence for a low-spin to intermediate-spin state transition inLaCoO3. Physical Review B. https://doi.org/10.1103/physrevb.66.020402
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