This article is cited in 5 papers

Magnetism

Ion-electron transfer in solid solutions Rb$_{2-2x}$Fe$_{2-x}$P$_x$O$_4$

E. I. Lakhno, E. I. Burmakin, I. V. Korzun, G. Sh. Shekhtman

Institute of High-Temperature Electrochemistry, RAS, Ekaterinburg

Abstract: The rubidium monoferrite RbFeO$_2$-based solid solutions with the composition Rb$_{2-2x}$Fe$_{2-x}$P$_x$O$_4$ have been synthesized, and their crystal structure and the temperature and concentration dependences of the total and electron conductivities have been studied. The introduction of $P^{5+}$ ions has been found to sharply decrease the electron conductivity that prevails in pure rubidium monoferrite and, at the same time, to increase the ionic conductivity. The latter becomes dominant as the phosphorus concentration increases. The maximum rubidium-cation conductivity of the materials under study is $\sim$3 $\times$ 10$^{-2}$ S/cm at 300$^\circ$C and $\sim$3 $\times$ 10$^{-1}$ S/cm at 700$^\circ$C. The results have been compared with the previously obtained data for similar solid solutions based on rubidium monogallate and monoaluminate.

Received: 20.07.2011

 English version: Physics of the Solid State, 2012, 54:3, 504–507

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