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

Abstract

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.

Rare Earth Based Iron Garnet – A Survey on Its Magnetic Properties

“…In addition to these doping, other dopants have been studied in GdIG, including cobalt (Co), calcium(Ca), cerium (Ce), Ruthenium(Ru) and manganese (Mn) etc. [53][54][55][56][57][58][59]. These dopants can affect the magnetic properties of GdIG in various ways, including changes in magnetic ordering, magnetic anisotropy, and magnetization.…”

The effects of Al/Fe ratio on the magnetic and fluorescence properties of (Yb,Gd)3(Sc,Al,Fe)5O12garnet

“…Synthetic garnet crystals including rare earth (RE)-doped garnets have attracted much attention in the last decades because of their excellent optical and magnetic properties. [1][2][3][4][5][6][7][8] The garnet structure is classified into the space group Ia 3d, where the dodecahedral (24c) sites, octahedral (16a) sites, and tetrahedral (24d) sites 9) are occupied by metal ions as shown in Figs. 1(a) and 1(b).…”