Rare earth doped cobalt ferrite thin films deposited by PLD

Dascălu, Georgiana; Pompilian, Gloria; Chazallon, Bertrand; Nica, Valentin; Caltun, Ovidiu Florin; Gurlui, Silviu; Focşa, Cristian

doi:10.1007/s00339-012-7196-8

Cited by 42 publications

(13 citation statements)

References 22 publications

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“…Despite the abundance of studies and reviews comparing Raman spectra of different spinel‐type iron oxides and ferrites containing various metal dopants, there is no in‐depth knowledge of the relationship of Raman spectra with physical and chemical properties of NPs. Another uncertainty is the origin of Raman bands: certain experimental results suggest that bands in the 600–750 cm −1 spectral region arise from tetrahedral (A‐site) systems and those in the 100–600 cm −1 region from octahedral (B‐site) systems, whereas the other line of experimental and theoretical considerations lead to the conclusion that all active Raman bands arise from A‐sites …”

Section: Introductionmentioning

confidence: 99%

Raman spectra tell us so much more: Raman features and saturation magnetization for efficient analysis of manganese zinc ferrite nanoparticles

Nekvapil

Bunge

Radu

et al. 2020

J Raman Spectroscopy

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Raman spectroscopy (RS) measurements contribute to characterization of spinel phase ferrite nanoparticles. However, the capabilities of micro‐Raman analysis of such materials are presently not fully exploited. In order to expand the frontier of RS in nanomaterials research, we conducted an in‐depth study of spinel‐structured MnxZn1‐xFe2O4 nanoparticles (0.75 < x < 0.9) to prospect the linkage of their Raman features with their respective chemical or physical properties. We correlate for the first time Raman features of MnxZn1‐xFe2O4 spinel‐structured nanoparticles with their saturation magnetization (MS), most notably via the band around 713 cm−1, the area of which was found to be inversely related to MS. The insights presented here show that assessment of MS via Raman features does not require prior knowledge of neither crystalline phase nor size of particles and thus can be used for rapid assessment of newly synthetized MnxZn1‐xFe2O4 samples, boosting the efficiency of Raman technique applied to nanostructured materials research.

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Section: Introductionmentioning

confidence: 99%

Raman spectra tell us so much more: Raman features and saturation magnetization for efficient analysis of manganese zinc ferrite nanoparticles

Nekvapil

Bunge

Radu

et al. 2020

J Raman Spectroscopy

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“…As a response to the large demand numerous techniques have been employed to obtained ferrites in nanoparticle form, thin and thick films, or controlled morphology such as nanocubes and nanorods . Most commonly used synthesis methods are the ceramic method, in solution syntheses, sol‐gel methods and laser ablation or RF sputtering for thin and thick layer formulations …”

Section: Introductionmentioning

confidence: 99%

“…12 Most commonly used synthesis methods are the ceramic method, 13,14 in solution syntheses, 15 sol-gel methods 16 and laser ablation or RF sputtering for thin and thick layer formulations. 17,18 Each of the ferrite applications require specific characteristics. For example when obtaining nanoferrite based sensors, the electrical and magnetic properties must be finely controlled to obtain effective sensors.…”

Section: Introductionmentioning

confidence: 99%

Increased sensibility of mixed ferrite humidity sensors by subsequent heat treatment

Vîrlan

Tudorache

Pui

2017

Int J Applied Ceramic Tech

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The study presents the effects of different calcination temperatures on the size and morphology of mixed Co‐Ni ferrites, and the respective changes in the magnetic and electrical properties, with emphasis on their applicability as humidity sensors. The data suggests that the heat treatment does not significantly change the magnetic properties, but significant variations on the morphology of the nanoparticles, correlated with large changes in the electrical properties of the nanoparticles in terms of electrical permittivity and resistivity with electrical field frequency and humidity, with a clear influence of the calcination temperature over the sensibility of the materials to humidity.

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“…This phenomenon is characterized by a modification of the anisotropy constants and is well known in the garnet type RFe 5 [19,20]. Raman et al have tried to substitute Gd for Fe but GdFeO 3 peaks are visible for Gd to Fe ratios higher than 0.05 [21], Recent preparations of CoRE x Fe 2 À x O 4 (RE¼Nd, Sm and Gd) by the chemical co-precipitation method or by pulsed laser deposition (PLD) have been performed for values of x up to 0.2 [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%