| Autor: |
Okano, T., Kitao, S., Seto, M., Atou, T., Itoh, M., Matoba, M., Kamihara, Y. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 2015, Vol. 117 Issue 17, p17E123-1-17E123-14, 4p, 1 Diagram, 5 Graphs |
| Abstrakt: |
We report crystallographic and magnetic properties of layered iron oxypnictide CeFe1-xCrxPO (x=0.000-0.692). Interlayer distances between Ce2O2 and (Fe1-xCrx)2P2 layers increase as a function of x, suggesting suppression of Kondo coupling among hybridized conducting orbitals and localized Ce 4f orbitals. CeFe1-xCrxPO (x=0.100-0.384) exhibits finite ferromagnetic transition temperatures (Tcurie) obtained by Arrott plots, although 57Fe Mössbauer spectra reveal paramagnetic Fe sublattice at T⩾4.2 K. These results indicate that the ferromagnetic phase transitions of samples are mainly due to Ce sublattice. For the samples with x⩾0.500, no ferromagnetic order is observed down to 2K. These results verify that ferromagnetic quantum critical points of CeFe1-xCrxPO appear at 0.045⩽x⩽0.100 and 0.384⩽x⩽0.500. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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