ESR study of the Prussian blue analogue Rb0.8Mn1.1[Fe(CN)6]·D 2O

Matej Pregelj, Andrej Zorko, Denis Arčon, Serena Margadonna, Kosmas Prassides, H. van Tol, L. C. Brunel, A. Ozarowski

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7 Citations (Scopus)

Abstract

We performed electron spin resonance (ESR) studies of the mixed valence Prussian blue analogue,Rb0.8Mn1.1 [Fe(CN)6]·D2O in a wide frequency (9.5-319 GHz) and temperature (3.5-300 K) interval. Evidence for the proposed high-temperature Mn2+ (S = frac(5, 2))-NC-Fe3+ (S = frac(1, 2)) to low-temperature Mn3+ (S=2)-NC-Fe2+ (S=0) internal charge transfer has been detected: a characteristic reduction of χESRT on cooling from room temperature to 100 K, a particular frequency dependence of the room temperature ESR linewidth, and the temperature dependence of the ESR linewidth. Short-range magnetic correlations, reflected in a large broadening and dramatic shift of the ESR signal develop just above TC=10 K. Below TC, both the linewidth and the shift in position mimic the temperature dependence of the order parameter. In a quench experiment TC was reduced by 3 K. The observed ferromagnetic ordering arises from Mn3+ (S=2) moments in the low-temperature electronic configuration.

Original languageEnglish
Pages (from-to)e680-e683
JournalJournal of Magnetism and Magnetic Materials
Volume316
Issue number2 SPEC. ISS.
DOIs
Publication statusPublished - 2007 Sep

Keywords

  • Ferromagnetism
  • Magnetic transition
  • Structural transformation
  • Transition-metal

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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