We present a study of the Co spin-state changes in Pr0.5Ca0.5CoO3 across the metal-insulator transition by means of the analysis of two complementary synchrotron x-ray spectroscopic techniques. Recorded experimental and charge transfer multiplet–based calculated Co L2,3 absorption spectra, in combination with Co Kβ main emission lines, indicate that Co3+ ion spin state evolves from low in the insulating phase to a low:high mixed state in the metallic regime, close to a 1:1 ratio at ambient temperature. A pure high spin state can be discarded, while the occurrence of an intermediate state is also questioned.
Spin-state transition in Pr0.5Ca0.5CoO3 analyzed by x-ray absorption and emission spectroscopies
Gallo, Erik;
2012-01-01
Abstract
We present a study of the Co spin-state changes in Pr0.5Ca0.5CoO3 across the metal-insulator transition by means of the analysis of two complementary synchrotron x-ray spectroscopic techniques. Recorded experimental and charge transfer multiplet–based calculated Co L2,3 absorption spectra, in combination with Co Kβ main emission lines, indicate that Co3+ ion spin state evolves from low in the insulating phase to a low:high mixed state in the metallic regime, close to a 1:1 ratio at ambient temperature. A pure high spin state can be discarded, while the occurrence of an intermediate state is also questioned.
| File | Dimensione | Formato | |
|---|---|---|---|
|
Herrero-Martin12_PCCO-XAS-XES_PRB.pdf
Accesso aperto con embargo fino al 31/12/2099
Tipo di file:
POSTPRINT (VERSIONE FINALE DELL’AUTORE)
Dimensione
521.24 kB
Formato
Adobe PDF
|
521.24 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
