Magnetic and magneto-optical properties of nickel hexacyanoferrate/chromate thin films

Fitta, Magdalena; Prima-García, Helena; Czaja, Paweł; Korzeniak, Tomasz; Krupiński, Michał; Wojtyniak, Marcin; Bałanda, Maria

doi:10.1039/c6ra25775e

Cited by 16 publications

(15 citation statements)

References 19 publications

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“…The detection of clearly defined two transitions confirms the presence of two PBA films as well as absence of extra magnetic phases in examined bilayer system. As it was observed for individual layers of PBA thin films obtained by “layer by layer” deposition, the bilayer also shows the anisotropy‐ a much stronger magnetic response is observed for the films oriented parallel to the direction of the magnetic field. Moreover the large hysteretic behaviour between ZFC and FC curves is observed what is related to a spin‐ glasslike behaviour.…”

Section: Resultssupporting

confidence: 58%

Magnetic Properties of Bilayer Thin Film Composed of Hard and Soft Ferromagnetic Prussian Blue Analogues

et al. 2017

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The molecule‐ based bilayer system composed of hard Ni3.38[Fe(CN)6]2⋅nH2O and soft Ni3.1[Cr(CN)6]2⋅nH2O ferromagnetic Prussian blue analogues has been fabricated on a solid substrate by “layer by layer” deposition. The structure and morphology characterization as well as results of magnetic measurements are described. The thickness of the bilayer is ca. 140 nm including a 35 nm interface. This bilayer system shows anisotropic magnetic properties reflected in the shape of magnetic hysteresis measured in various film orientation with respect to the direction of external magnetic field. There is no exchange interaction between hard and soft magnetic layer and irrespective of bilayer orientation, the magnetization and demagnetization process of both Ni3.38[Fe(CN)6]2⋅nH2O and Ni3.1[Cr(CN)6]2⋅nH2O layers occurs independently.

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Section: Resultssupporting

confidence: 58%

Magnetic Properties of Bilayer Thin Film Composed of Hard and Soft Ferromagnetic Prussian Blue Analogues

et al. 2017

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“…4,5 There have also been a number of studies that employ multiple Prussian blue analogues (PBAs) to create heterostructures in the form of thin films or nanoparticles to study photoinduced magnetism 6,7 and magneto-structural effects. [8][9][10] Their electrochemical 11 and optical 12 properties have also been studied. In particular, Liao et al 12 made a PB and NiFe PBA composite material using a conductive polymer matrix, which exhibited electrochromic switching.…”

Section: Introductionmentioning

confidence: 99%

Electrochromic bilayers of Prussian blue and its Cr analogue

et al. 2018

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The distinct optical absorption spectra of the two layers allowed spectroelectrochemical measurements to probe the electrochemical activity of the individual layers during the switching of the Prussian blue layer.We found that for producing layers of equal optical density, the thickness of the layers had to be different due to a difference in oscillator strength for the metal-to-metal charge-transfer transition. The films used here had a thickness of 300 AE 70 nm and 30 AE 15 nm for the FeCr and FeFe sub-layers, respectively.The colouration efficiency was found to be 147.8 AE 0.8 cm 2 C À1 for the multilayered film. These resultsshow that it is possible to obtain bilayers of Prussian blues that, with a unique optical spectral fingerprint of each sub-layer, retain the electrochromic functionality and therefore enable layer-sensitive studies of charge-transfer processes in thin film heterostructures of multifunctional materials.

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“…The dark-state and photoexcited-state data bear striking resemblance to the field-cooled magnetization of thin NiCr-PBA films oriented parallel and perpendicular to the field. 59 In the earlier thin-film study, the differences in magnetization are driven by the shape anisotropy, which produces a hard axis normal to the plane of the film and an easy plane contained within the film. Similarly, for the photoinduced magnetization studied here, there is an accompanying change in the anisotropy, which has been identified as the source of the magnetization decrease in KNiCr-PBA heterostructures.…”

Section: ■ Discussionmentioning

confidence: 99%

Crafting Spin-State Switchable Strain Profiles within Rb_xCo[Fe(CN)₆]_y@K_jNi[Cr(CN)₆]_k Heterostructures

et al. 2020

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Spin-transition heterostructures have shown promise for inducing large switchable stresses at the nanoscale with a volumetric work density similar to piezoelectrics, but before practical applications are feasible, how heterostructure interfaces and geometry influence the transmission of stress and, in return, how they affect the spin-transition actuator itself, must be better understood. Here, four series of cubic spin-transition Prussian blue analogue (PBA) core–shell heterostructures were developed in order to probe the scaling behavior of the strain induced in the shell by the spin transition of the core. Cubic Rb x Co[Fe(CN)6] y·nH2O (RbCoFe-PBA) particles ranging 100–600 nm were used to prepare separate series of Rb x Co[Fe(CN)6] y ·nH2O@KjNi[Cr(CN)6] k ·mH2O (RbCoFe@KNiCr-PBA) core–shell particles with magnetic KNiCr-PBA shells ranging from 15 to 130 nm. A model fit to the strain-modified magnetization extracts the “strained volume” of the shell, and the results are compared with structural changes observed with powder X-ray diffraction. A linear relationship is found between the strained volume of the shell and the volume of the core for thicker shells, where the magnetic KNiCr-PBA shell is influenced to depths greater than 100 nm in response to the spin transition of the RbCoFe-PBA core. For thin shells, the relationship is more complicated, as the volume change in the actuating core and the strain it induces in the shell become interdependent and a function of shell thickness.

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Magnetic and magneto-optical properties of nickel hexacyanoferrate/chromate thin films

Abstract: We present thin films obtained by “layer by layer” deposition, where Fe/Cr ratio is controlled by the dipping sequence. The goal of our work is the investigation of material properties evolution induced by the change of its chemical composition.

Cited by 16 publications

References 19 publications

Magnetic Properties of Bilayer Thin Film Composed of Hard and Soft Ferromagnetic Prussian Blue Analogues

Magnetic Properties of Bilayer Thin Film Composed of Hard and Soft Ferromagnetic Prussian Blue Analogues

Electrochromic bilayers of Prussian blue and its Cr analogue

Crafting Spin-State Switchable Strain Profiles within Rb_xCo[Fe(CN)₆]_y@K_jNi[Cr(CN)₆]_k Heterostructures

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Magnetic and magneto-optical properties of nickel hexacyanoferrate/chromate thin films

Abstract: We present thin films obtained by “layer by layer” deposition, where Fe/Cr ratio is controlled by the dipping sequence. The goal of our work is the investigation of material properties evolution induced by the change of its chemical composition.

Cited by 16 publications

References 19 publications

Magnetic Properties of Bilayer Thin Film Composed of Hard and Soft Ferromagnetic Prussian Blue Analogues

Magnetic Properties of Bilayer Thin Film Composed of Hard and Soft Ferromagnetic Prussian Blue Analogues

Electrochromic bilayers of Prussian blue and its Cr analogue

Crafting Spin-State Switchable Strain Profiles within RbxCo[Fe(CN)6]y@KjNi[Cr(CN)6]k Heterostructures

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Crafting Spin-State Switchable Strain Profiles within Rb_xCo[Fe(CN)₆]_y@K_jNi[Cr(CN)₆]_k Heterostructures