Journal of the Korean Physical Society

, Volume 62, Issue 12, pp 1910–1913 | Cite as

Soft x-ray absorption spectroscopy study of Prussian blue analogue ACo[Fe(CN)6]H2O nano-particles (A=Na, K)

  • Eunsook Lee
  • D. H. Kim
  • Jihoon Hwang
  • J. -S. Kang
  • Nguyen Van Minh
  • In-Sang Yang
  • T. Ueno
  • M. Sawada
Article
  • 108 Downloads

Abstract

The electronic structures of Prussian blue analogue ACo[Fe(CN)6]H2O (A=Na, K) nano-size particles has been investigated by employing soft X-ray absorption spectroscopy (XAS) at the Fe and Co L edges. Both Fe and Co ions are found to be Fe2+-Fe3+ and Co2+-Co3+ mixed-valent, with the average valence of v(Fe)∼ 2.36 and v(Co)∼ 2.41. This finding suggests that the mechanism of the photo-induced spin transition in ACo[Fe(CN)6]H2O (A=Na, K) is not a simple spin-state transition of Fe2+-Co3+ → Fe3+-Co2+. The Fe ions in ACo[Fe(CN)6]H2O are also found to have a strong covalent bonding to (CN) ligands, but a very weak bonding to O(H2O), while Co ions have a stronger bonding to O(H2O) than to (CN) ligands.

Keywords

XAS Prussian blue Molecular magnets Electronic structure 

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Copyright information

© The Korean Physical Society 2013

Authors and Affiliations

  • Eunsook Lee
    • 1
  • D. H. Kim
    • 1
  • Jihoon Hwang
    • 1
  • J. -S. Kang
    • 1
  • Nguyen Van Minh
    • 2
  • In-Sang Yang
    • 3
  • T. Ueno
    • 4
  • M. Sawada
    • 4
  1. 1.Department of PhysicsThe Catholic University of KoreaBucheonKorea
  2. 2.Department of PhysicsHanoi National University of EducationHanoiVietnam
  3. 3.Department of PhysicsEwha Womans UniversitySeoulKorea
  4. 4.Hiroshima Synchrotron Radiation Center (HSRC)Hiroshima UniversityHigashi-HiroshimaJapan

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