Detailed crystallization study of co-precipitated Y1.47Gd1.53Fe5O12 and relevant magnetic properties

Serra, Rogério Arving; Ogasawara, Tsuneharu; Ogasawara, Angélica Soares

doi:10.1590/s0100-40422007000700009

Cited by 8 publications

(4 citation statements)

References 14 publications

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“…The coercive strength (Hc) of the Gd-doped YIG compound in this investigation was 0.53 Oe, which is significantly better than that reported in prior studies based on magnetic property measurements 26,27 . In addition, the calculated magnetization value was validated by the results of the YIG sample test with gadolinium doping at compositions of 0%, 14%, and 33% mol.…”

Section: Microwave Response Performancecontrasting

confidence: 77%

Improving Microwave Response Performance through Involvement of Gadolinium Dopant into Yttrium Iron Garnet

et al. 2022

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In this study, the influence of gadolinium dopant composition on the microwave response performance of yttrium iron garnet was investigated. A hydraulic pressing was used to create the ferrite garnet sample. As the test material, pure oxide powder with an average grain size of 1 micron was employed. A pressure force of 700 MPa was used to compact the sample pellets. The sintering process was carried out in a high-temperature tube furnace at 1450 o C for five hours. This research shows that the calculated findings match the experimental data, demonstrating that the addition of gadolinium reduces the total magnetic moment and insertion loss of yttrium iron garnet. Adding 14 to 25% mol of gadolinium to one mol of iron oxide resulted in an insertion loss value near to zero, according to the calculations. To validate this calculation value, the microwave response of a sample of yttrium iron garnet with 15% mol of gadolinium doping was measured at frequency 4 GHz, yielding an insertion loss parameter value of 0.25 dB, which has a crucial function in lowering the insertion loss value of yttrium iron garnet.

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Section: Microwave Response Performancecontrasting

confidence: 77%

Improving Microwave Response Performance through Involvement of Gadolinium Dopant into Yttrium Iron Garnet

et al. 2022

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“…The magnetization is lost completely at 265 o C and thereby the sample becomes diamagnetic above curie point and this justifies the curie-weiss law. Hence the large scale production of YIG samples in the present investigation do not abruptly change the curie temperature [22][23][24].…”

Section: Thermomagnetization Analysismentioning

confidence: 66%

Synthesis and Spectroscopic Analysis of Ferrimagnetic Yttrium Iron Garnet for Tunable Filter Applications

Goldwin¹,

Aravindhan

Senthil³

et al. 2017

NHC

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Yttrium iron garnet (YIG) powdered ceramic powders were synthesized as bulk quantity by traditional solid state synthesis method by the use of yttrium oxide and iron oxide powders. Finely grinded powders were then calcinated for various temperatures such as 900, 1200 oC for 3 hours and 1400oC for 6 hours respectively after making multiple grindings to obtain homogeneity. The calcinated powders were then subjected to phase purity by the use of powder X-ray analysis. As it is clear evident from the samples that the powdered samples were of single phase in nature and that it is clear evident from the nature of the sample which transforms to green in colour from the traditional red iron based oxides. The bonding nature was further ascertained by the used of Fourier transform infrared spectrometer (FTIR) analysis. Thermal stability and phase formation was confirmed through thermal analysis. The thermo-magnetization curve reveals the curie temperature of the sample which is in good agreemement with that of the reported values. Magnetization versus magnetic field curve was obtained which showed increase in magnetization due to the pure phase formation. These preliminary results suggest that the YIG powders could be made in to ceramic pellets for the use of tunable filters in the areas of microwave oscillators.

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“…One of the most interesting systems is cerium-doped gadolinium yttrium aluminum iron garnet (Ce:Gd-YAIG) where essentially Ce:YAG is fluorescent and Gd-YIG is magnetic. [19][20][21] Such multifunctionality should provide unique opportunities toward developing new magneto-optical applications including magnetic sensors. In garnets, rare earth ions such as Y 3+ and Ce 3+ tend to occupy the dodecahedral sites, while trivalent metallic ions such as Al 3+ and Fe 3+ occupy the octahedral and tetrahedral sites.…”

Section: Introductionmentioning

confidence: 99%

Magnetic and fluorescence properties of cerium-doped yttrium gadolinium aluminum iron garnet crystals

Aoki

Shima

2014

Jpn. J. Appl. Phys.

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Magnetic and fluorescence properties of chemically synthesized Ce:Gd-YAIG (Ce0.05GdxY2.95−xAl5−yFeyO12) nanocrystals have been investigated. The structural characterization by X-ray diffraction (XRD) shows that a garnet phase has been identified in samples with 0 ≤ x ≤ 2.95 and 0 ≤ y ≤ 3.0. When y = 0, only garnet peaks are observed for 0 ≤ x ≤ 2.5, while both garnet and perovskite phases are present for x > 2.5. It is found from XRD Rietveld analyses that the site occupancy of Fe3+ at the tetrahedral and octahedral sites in the garnet is independent of the amount of Y3+ substituted by Ce3+ and Gd3+ at the dodecahedral sites. The saturation magnetization for the sample with x = 0 and y = 3.0 is 4.35 emu/g, while that with x = 2.5 and y = 3.0 is 87.5 emu/g. When the Fe3+ composition y is varied from 0 to 3.0 at x = 2.5, the intensity of fluorescence at the emission wavelength ∼570 nm significantly decreases presumably due to absorption by Fe3+ that is increased in the crystal.

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Detailed crystallization study of co-precipitated Y1.47Gd1.53Fe5O12 and relevant magnetic properties

Cited by 8 publications

References 14 publications

Improving Microwave Response Performance through Involvement of Gadolinium Dopant into Yttrium Iron Garnet

Improving Microwave Response Performance through Involvement of Gadolinium Dopant into Yttrium Iron Garnet

Synthesis and Spectroscopic Analysis of Ferrimagnetic Yttrium Iron Garnet for Tunable Filter Applications

Magnetic and fluorescence properties of cerium-doped yttrium gadolinium aluminum iron garnet crystals

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