Effect of film thickness on the photoinduced decrease in magnetism for thin films of the cobalt iron Prussian blue analogue Rb0.7Co4[Fe(CN)6]3.0

Franz A. Frye, Daniel M. Pajerowski, Sarah M. Lane, Norman E. Anderson, Ju Hyun Park, Mark W. Meisel, Daniel R. Talham

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Films of the photomagnetic Prussian blue analogue Rb0.7Co4(Fe(CN)6)3.0(Co-Fe PBA) were deposited onto a Melinex® substrate using two different multiple sequential adsorption methods. Film thickness, measured using atomic force microscopy, was controlled by the number of deposition cycles. The photoinduced magnetism known for the bulk Co-Fe PBA at low temperatures is also seen in the thin films, although the response is anisotropic. A photoinduced increase in magnetization is observed when the film is parallel (∥) to the applied magnetic field (HE), while a photoinduced decrease is observed when the film is perpendicular (⊥) to a weak HE. The relationship between the film thickness and the photoinduced decrease in magnetization is explored in this article. The photoinduced decrease is observed for films less than ∼200 nm thick. The behavior is explained by invoking a dipolar interaction between primordial ferrimagnetic domains and the photoswitchable pairs arrayed in the quasi-2D thin film.

Original languageEnglish
Pages (from-to)2281-2286
Number of pages6
JournalPolyhedron
Volume26
Issue number9-11
DOIs
StatePublished - Jun 15 2007
Externally publishedYes

Funding

This work was supported, in part, by NSF DMR-0305371 (MWM) and NSF DMR-0543362 (DRT). SEM images were obtained at the University of Florida electron microscopy core laboratory. ICP-MS data were collected at the Department of Geology, University of Florida.

FundersFunder number
National Science FoundationDMR-0543362, DMR-0305371

    Keywords

    • Magnetic anisotropy
    • Magnetic thin film
    • Photoinduced magnetism
    • Prussian blue film

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