Details

Autor(en) / Beteiligte

• Xia, Yanfang
• Mo, Jiajun
• Zhang, Qinghang
• Liu, Min
• Peng, Anguo

Titel

Pressure-Induced Changes in Prussian Blue Analogues Na0.54Co1.23[Fe(CN)6]·7.6H2O

Ist Teil von

• Journal of electronic materials, 2022-12, Vol.51 (12), p.7150-7155

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The effects of pressure on the microstructure and magnetic properties of Co-Fe bistable Prussian blue analogues (PBA) were investigated by Mössbauer spectroscopy and magnetic measurements. Na 0.54 Co 1.23 [Fe(CN) 6 ]·7.6H 2 O was prepared by the co-precipitation method and pressurized at 1–40 MPa using a supercritical CO 2 extraction unit. All materials are face-centered cubic with a Néel temperature of about 14 K. The results showed that two electronic configurations existed in the NaCoFe-PBA system at room temperature: Fe III LS -CN-Co II HS and Fe II LS -CN-Co III LS . The pressure induced the enhancement of antiferromagnetic coupling between Co-Fe ions and controlled the interconversion of the two structures through charge transfer mediated by cyanide bridges. We found that the directions of redox reactions occurring at 0–20 MPa and 20–40 MPa did not coincide, suggesting that there may be more complex interactions between structural and electronic events.