Author/Authors :
Osawa، نويسنده , , Hitoshi and Iwazumi، نويسنده , , Toshiaki and Tokoro، نويسنده , , Hiroko and Ohkoshi، نويسنده , , Shin-ichi and Hashimoto، نويسنده , , Kazuhito and Shoji، نويسنده , , Hironobu and Hirai، نويسنده , , Eiju and Nakamura، نويسنده , , Tetsuya and Nanao، نويسنده , , Susumu and Isozumi، نويسنده , , Yasuhito، نويسنده ,
Abstract :
The thermal phase transition of RbMnFe(CN)6 has been observed by Mn and Fe 3p–1s X-ray emission spectroscopy (XES) and 1s X-ray absorption spectroscopy (XAS). The thermal variations of the spin states and the valences of Mn and Fe were determined to be Mn2+(S=5/2)–NC–Fe3+(S=1/2) for the high-temperature (HT) phase and Mn3+(S=2)–NC–Fe2+(S=0) for the low-temperature (LT) phase. These transitions are thus caused by charge transfer between Mn and Fe. The temperature dependences of Mn and Fe 3p–1s XES and 1s XAS were observed as the composition of the spectra of the HT and LT phases. The ratios of the HT component in each spectrum show good agreement with the thermal transition curves observed with magnetic susceptibility measurements.
Keywords :
A. Magnetically ordered materials , D. Electronic states (localized) , D. Phase transitions , E. Synchrotron radiation , E. X-ray spectroscopies
