Anisotropic dusceptibility of La_2-xSr_xCoO_4 related to the dpin dtates of cobalt
We present a study of the magnetic susceptibility of La_2-xSr_xCoO_4 single crystals in a doping range 0.3<=x<=0.8. Our data shows a pronounced magnetic anisotropy for all compounds. This anisotropy is in agreement with a low-spin ground state (S=0) of Co^3+ for x>=0.4 and a high-spin groun...
Gespeichert in:
| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) Kapitel/Artikel |
| Sprache: | Englisch |
| Veröffentlicht: |
2008
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| In: |
Arxiv
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| Online-Zugang: | Verlag, kostenfrei, Volltext: http://arxiv.org/abs/0801.2087
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| Verfasserangaben: | N. Hollmann, M.W. Haverkort, M. Cwik, M. Benomar, M. Reuther, A. Tanaka, T. Lorenz |
MARC
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| 245 | 1 | 0 | |a Anisotropic dusceptibility of La_2-xSr_xCoO_4 related to the dpin dtates of cobalt |c N. Hollmann, M.W. Haverkort, M. Cwik, M. Benomar, M. Reuther, A. Tanaka, T. Lorenz |
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| 520 | |a We present a study of the magnetic susceptibility of La_2-xSr_xCoO_4 single crystals in a doping range 0.3<=x<=0.8. Our data shows a pronounced magnetic anisotropy for all compounds. This anisotropy is in agreement with a low-spin ground state (S=0) of Co^3+ for x>=0.4 and a high-spin ground state (S=3/2) of Co^2+. We compare our data with a crystal-field model calculation assuming local moments and find a good description of the magnetic behavior for x>=0.5. This includes the pronounced kinks observed in the inverse magnetic susceptibility, which result from the anisotropy and low-energy excited states of Co^2+ and are not related to magnetic ordering or temperature-dependent spin-state transitions. | ||
| 650 | 4 | |a Condensed Matter - Strongly Correlated Electrons | |
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