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 language | English |
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Pages (from-to) | 2281-2286 |
Number of pages | 6 |
Journal | Polyhedron |
Volume | 26 |
Issue number | 9-11 |
DOIs | |
State | Published - Jun 15 2007 |
Externally published | Yes |
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.
Funders | Funder number |
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National Science Foundation | DMR-0543362, DMR-0305371 |
Keywords
- Magnetic anisotropy
- Magnetic thin film
- Photoinduced magnetism
- Prussian blue film