Universal thermal response of the Prussian blue lattice

T. Matsuda, J. E. Kim, K. Ohoyama, Y. Moritomo

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61 Citations (Scopus)


Thermal responses of Prussian blue lattice, that is, a rocksalt-type network of metal ions bridged by cyano group, are systematically investigated for (Cs,Rb) x MII [FeIII (CN) 6] y z H2 O (M=Ni, Cu, Zn, and Cd) and (Cs,Rb) x MIII [FeII (CN) 6] y z H2 O (M=Fe and Co) by means of the synchrotron-radiation x-ray powder diffraction. We found a universal relation between the coefficient (βdlna/dT; a is lattice constant) of the thermal expansion and magnitude of a: β changes the sign from positive to negative with increase in a. We ascribed the negative thermal expansion observed in the large- a region to intrinsic rotational instability of the [Fe (CN) 6] unit.

Original languageEnglish
Article number172302
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number17
Publication statusPublished - 2009 May 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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