Charge transfer of CsMnFe-Prussian blue analogue induced by pressure and temperature. (4th May 2022)

• Record Type: Journal Article
• Authors: Zhang, Qinghang; Mo, Jiajun; Xie, Yimin; Xia, Yanfang; Liu, Min
• Is Part Of: Phase transitions. Volume 95:Number 5(2022)
• Page Start: 345
• Page End: 352
• Publication Date: 2022-05-04
• Subjects: Mössbauer spectrum -- charge transfer -- thermal hysteresis loop -- prussian blue analogue; Phase transformations (Statistical physics) -- Periodicals; 530.47405
• DOI: 10.1080/01411594.2022.2049266
• Languages: English
• ISSNs: 0141-1594

Abstract

ABSTRACT : The charge transfer properties of CsMnFe-PBA after 40 MPa pressure treatment and under temperature variation were investigated using temperature-variable Mössbauer spectrum. Both the 0 and 40 MPa treated samples have face-centered cubic structure, and the lattice constants are 10.504 Å and 10.499 Å. The room temperature Mössbauer spectra show that the sample at 0 MPa consists of HT and LT phases, and only HT phase is present at 40 MPa. Variable-temperature Mössbauer spectra revealed the thermal phase transition from 220 K to 130 K, which is accompanied by charge transfer from Fe III (LS, t2g 5 eg 0 )-CN-Mn II (HT) to Fe II (LS, t2g 6 eg 0 )-CN-Mn III (LT), and the phase transition temperature during warming and cooling are different. It is concluded that there is a thermally induced hysteresis loop induced by charge transfer in the CsMn[Fe(CN)6 ]· x H2 O, and the pressure and temperature induce the charge transfer in the compound.