Microscopic evidence of spin state order and spin state phase separation in layered cobaltites &lt;em&gt;R&lt;/em&gt;BaCO&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;5.5&lt;/sub&gt; with &lt;em&gt;R&lt;/em&gt; = Y, Tb, Dy, and Ho

Luetkens, H.; Stingaciu, M.; Pashkevich, Yu.G.; Conder, K.; Pomjakushina, E.; Gusev, A.A.; Lamonova, K.V.; Lemmens, P.; Klauss, H.-H.

doi:10.1103/PhysRevLett.101.017601

Microscopic evidence of spin state order and spin state phase separation in layered cobaltites RBaCO₂O_5.5 with R = Y, Tb, Dy, and Ho

Luetkens H, Stingaciu M, Pashkevich YG, Conder K, Pomjakushina E, Gusev AA, Lamonova KV, Lemmens P & Klauss H-H

Citation

Luetkens, H., Stingaciu, M., Pashkevich, Y. G., Conder, K., Pomjakushina, E., Gusev, A. A., … Klauss, H. H. (2008). Microscopic evidence of spin state order and spin state phase separation in layered cobaltites RBaCO₂O_5.5 with R = Y, Tb, Dy, and Ho. Physical Review Letters, 101(1), 017601 (4 pp.). https://doi.org/10.1103/PhysRevLett.101.017601

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:19178

We report muon-spin relaxation measurements on the magnetic structures of RBaCO₂O_5.5 with R = Y, Tb, Dy, and Ho. Three different phases, one ferrimagnetic and two antiferromagnetic, are identified below 300K. They consist of different ordered spin state arrangements of high-, intermediate-, and low-spin Co³⁺ of CoO₆ octahedra. Phase separation into well separated regions with different spin state order is observed in the antiferromagnetic phases. The unusual strongly anisotropic magnetoresistance and its onset at the FM-AFM phase boundary is explained.

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Journal Article

Title

Microscopic evidence of spin state order and spin state phase separation in layered cobaltites RBaCO₂O_5.5 with R = Y, Tb, Dy, and Ho

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