Origin of the ESR spectrum in the Prussian Blue analogue RbMn[Fe(CN)6]*H2O


We present an ESR study at excitation frequencies of 9.4 GHz and 222.4 GHz of powders and single crystals of a Prussian Blue analogue (PBA), RbMn[Fe(CN)6]*H2O in which Fe and Mn undergoes a charge transfer transition between 175 and 300 K. The ESR of PBA powders, also reported by Pregelj et al. (JMMM, 316, E680 (2007)) is assigned to cubic magnetic clusters of Mn2+ ions surrounding Fe(CN)6 vacancies. The clusters are well isolated from the bulk and are superparamagnetic below 50 K. In single crystals various defects with lower symmetry are also observed. Spin-lattice relaxation broadens the bulk ESR beyond observability. This strong spin relaxation is unexpected above the charge transfer transition and is attributed to a mixing of the Mn3+ - Fe2+ state into the prevalent Mn2+ - Fe3+ state.

Publication DOI: https://doi.org/10.1103/PhysRevB.82.014422
Divisions: College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Chemical Engineering & Applied Chemistry
Additional Information: © 2010 The American Physical Society
Uncontrolled Keywords: electron spin resonance,pPrussian blue analog
Publication ISSN: 1550-235X
Last Modified: 03 Jan 2024 08:04
Date Deposited: 23 Apr 2012 13:08
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2010-07-21
Authors: Antal, Á.
Jánossy, A.
Forró, L.
Vertelman, E.J.M.
Van Koningsbruggen, Petra (ORCID Profile 0000-0001-9366-1913)
Van Loosdrecht, Paul H.M.



Version: Accepted Version

| Preview

Export / Share Citation


Additional statistics for this record