Anisotropic photoinduced magnetism in thin films of the prussian blue analogue AjCok[Fe(CN)6]l· nH2O

Franz A. Frye; Daniel M. Pajerowski; Ju Hyun Park; Mark W. Meisel; Daniel R. Talham

doi:10.1021/cm800576s

Anisotropic photoinduced magnetism in thin films of the prussian blue analogue A_jCo_k[Fe(CN)₆]_l· nH₂O

Franz A. Frye, Daniel M. Pajerowski, Ju Hyun Park, Mark W. Meisel, Daniel R. Talham

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

The photoinduced magnetism in thin films of the Prussian blue analogue A_jCo_k[Fe(CN)₆]_l·nH ₂O deposited on Melinex solid supports is anisotropic, exhibiting a photoinduced increase when oriented parallel to the external magnetic field and a decrease when oriented perpendicular. The anisotropic behavior is observed for films less than ∼200 nm thick below nominally 10 K, which is less than the ferrimagnetic ordering temperature (T_C) of 17 K, and in applied fields of less than ∼1.5 kG. The thin films with formulas Rb _0.7Co₄[Fe(CN)₆]_3.0, Rb _2.3Co₄[Fe(CN)₆]_3.1, and K _0.5Co₄[Fe(CN)₆]_3.2 were generated using sequential adsorption methods, alternately immersing the Melinex solid support in solutions of the constituent Co²⁺ and [Fe(CN) ₆]^3- ions. Film thickness is controlled by the number of deposition cycles and by variations in the deposition protocols. Measurements on films with different alkali ions and with different stoichiometry indicate that the microscopic mechanism for the photoinduced magnetization is the same in the films as in the bulk material. The unique anisotropy is qualitatively associated with the interface between the magnetic film and the solid support. Detailed studies of the influence of film thickness, applied field strength, and temperature support this description.

Original language	English
Pages (from-to)	5706-5713
Number of pages	8
Journal	Chemistry of Materials
Volume	20
Issue number	17
DOIs	https://doi.org/10.1021/cm800576s
State	Published - Sep 9 2008
Externally published	Yes

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@article{d4554be059a14293bb4f7c17d58d1b4a,

title = "Anisotropic photoinduced magnetism in thin films of the prussian blue analogue AjCok[Fe(CN)6]l· nH2O",

abstract = "The photoinduced magnetism in thin films of the Prussian blue analogue AjCok[Fe(CN)6]l·nH 2O deposited on Melinex solid supports is anisotropic, exhibiting a photoinduced increase when oriented parallel to the external magnetic field and a decrease when oriented perpendicular. The anisotropic behavior is observed for films less than ∼200 nm thick below nominally 10 K, which is less than the ferrimagnetic ordering temperature (TC) of 17 K, and in applied fields of less than ∼1.5 kG. The thin films with formulas Rb 0.7Co4[Fe(CN)6]3.0, Rb 2.3Co4[Fe(CN)6]3.1, and K 0.5Co4[Fe(CN)6]3.2 were generated using sequential adsorption methods, alternately immersing the Melinex solid support in solutions of the constituent Co2+ and [Fe(CN) 6]3- ions. Film thickness is controlled by the number of deposition cycles and by variations in the deposition protocols. Measurements on films with different alkali ions and with different stoichiometry indicate that the microscopic mechanism for the photoinduced magnetization is the same in the films as in the bulk material. The unique anisotropy is qualitatively associated with the interface between the magnetic film and the solid support. Detailed studies of the influence of film thickness, applied field strength, and temperature support this description.",

author = "Frye, {Franz A.} and Pajerowski, {Daniel M.} and Park, {Ju Hyun} and Meisel, {Mark W.} and Talham, {Daniel R.}",

year = "2008",

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doi = "10.1021/cm800576s",

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AU - Frye, Franz A.

AU - Pajerowski, Daniel M.

AU - Park, Ju Hyun

AU - Meisel, Mark W.

AU - Talham, Daniel R.

PY - 2008/9/9

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N2 - The photoinduced magnetism in thin films of the Prussian blue analogue AjCok[Fe(CN)6]l·nH 2O deposited on Melinex solid supports is anisotropic, exhibiting a photoinduced increase when oriented parallel to the external magnetic field and a decrease when oriented perpendicular. The anisotropic behavior is observed for films less than ∼200 nm thick below nominally 10 K, which is less than the ferrimagnetic ordering temperature (TC) of 17 K, and in applied fields of less than ∼1.5 kG. The thin films with formulas Rb 0.7Co4[Fe(CN)6]3.0, Rb 2.3Co4[Fe(CN)6]3.1, and K 0.5Co4[Fe(CN)6]3.2 were generated using sequential adsorption methods, alternately immersing the Melinex solid support in solutions of the constituent Co2+ and [Fe(CN) 6]3- ions. Film thickness is controlled by the number of deposition cycles and by variations in the deposition protocols. Measurements on films with different alkali ions and with different stoichiometry indicate that the microscopic mechanism for the photoinduced magnetization is the same in the films as in the bulk material. The unique anisotropy is qualitatively associated with the interface between the magnetic film and the solid support. Detailed studies of the influence of film thickness, applied field strength, and temperature support this description.

AB - The photoinduced magnetism in thin films of the Prussian blue analogue AjCok[Fe(CN)6]l·nH 2O deposited on Melinex solid supports is anisotropic, exhibiting a photoinduced increase when oriented parallel to the external magnetic field and a decrease when oriented perpendicular. The anisotropic behavior is observed for films less than ∼200 nm thick below nominally 10 K, which is less than the ferrimagnetic ordering temperature (TC) of 17 K, and in applied fields of less than ∼1.5 kG. The thin films with formulas Rb 0.7Co4[Fe(CN)6]3.0, Rb 2.3Co4[Fe(CN)6]3.1, and K 0.5Co4[Fe(CN)6]3.2 were generated using sequential adsorption methods, alternately immersing the Melinex solid support in solutions of the constituent Co2+ and [Fe(CN) 6]3- ions. Film thickness is controlled by the number of deposition cycles and by variations in the deposition protocols. Measurements on films with different alkali ions and with different stoichiometry indicate that the microscopic mechanism for the photoinduced magnetization is the same in the films as in the bulk material. The unique anisotropy is qualitatively associated with the interface between the magnetic film and the solid support. Detailed studies of the influence of film thickness, applied field strength, and temperature support this description.

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Anisotropic photoinduced magnetism in thin films of the prussian blue analogue A_jCo_k[Fe(CN)₆]_l· nH₂O

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