Synthesis and thermal stability of the solid solution AFeO2 (A = Ba, Sr, Ca).
We have studied the A-site substitution effect on the structural, thermal, and magnetic properties of the infinite layer iron oxide AFeO(2) (A = alkali-earth elements) with an FeO(4) square-planar coordination. Together with the previous study showing a total substitution by Ca, Ba substitution is found to be tolerable up to 30%, presenting almost the same substitutional range as that found in ACuO(2) under high pressure. Notably, Ba substitution shows little influence on the magnetic properties, in contrast to expectations from first principles calculations. The temperature at which oxidation to an AFeO(2.5) phase occurs and its transformation rate show a wide variation tunable solely by the out-of-plane distance.
Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan.
Takafumi
T
Yamamoto
Zhaofei
Z
Li
Cédric
C
Tassel
Naoaki
N
Hayashi
Mikio
M
Takano
Masahiko
M
Isobe
Yutaka
Y
Ueda
Kenji
K
Ohoyama
Kazuyoshi
K
Yoshimura
Yoji
Y
Kobayashi
Hiroshi
H
Kageyama
D001464:Barium / Q000737:chemistry*; D002118:Calcium / Q000737:chemistry*; D004355:Drug Stability; D005296:Ferrous Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D006358:Hot Temperature; D008280:Magnetics; D008958:Models, Molecular; D033363:Neutron Diffraction; D010087:Oxides / Q000737:chemistry*; D015204:Spectroscopy, Mossbauer; D013324:Strontium / Q000737:chemistry*; D013818:Thermogravimetry; D014961:X-Ray Diffraction
D005296:Ferrous Compounds; D010087:Oxides; D001464:Barium; D002118:Calcium; D013324:Strontium