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...
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| Autori principali: | , |
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| Natura: | Article (Journal) Chapter/Article |
| Lingua: | inglese |
| Pubblicazione: |
2008
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| In: |
Arxiv
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| Accesso online: | Verlag, kostenfrei, Volltext: http://arxiv.org/abs/0801.2087
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| Note sull'autore: | N. Hollmann, M.W. Haverkort, M. Cwik, M. Benomar, M. Reuther, A. Tanaka, T. Lorenz |
| Riassunto: | 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. |
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| Descrizione del documento: | Die Gruppe "2-x", der Kleibuchstabe "x" sowie die Ziffer 4 im Titel sind tiefgestellt Gesehen am 28.11.2017 |
| Descrizione fisica: | Online Resource |