Preparation of nano-sized Al-substituted yttrium iron garnets by the mechanochemical method and investigation of their magnetic properties

Mössbauer studies of Y3Fe5 − xAlxO12 nanopowders prepared by mechanochemical method

“…The spectra were then fitted with Lorentzian lines using fitting routines based on least square analysis. The magnetic properties of these samples were investigated in a recent publication [21]. Room temperature magnetizations of the samples at H = 1.5 T were found to be 12.0, 7.0, 0.9, 0.6, and 0.3 emu/g for the samples with x = 0.0, 0.5, 1.0, 1.5 and 2.0, respectively.…”

“…In substituted YIG a nonmagnetic substituent ion occupies predominantly an octahedral or tetrahedral site for small x as it is larger than Fe 3+ . In other words, the smaller ion persistently seeks a smaller site [21]. 57 Fe Mössbauer spectroscopy is a nuclear-probe technique that is very well suited for the investigation of the local symmetry, the magnetic state, and the charge states of iron ions in iron-containing materials [22,23].…”

Nucleation of samarium-iron-garnet Sm3Fe5O12/α-Fe junctions in cm-scale foam-like carbon films continuously filled with α-Fe

“…4 Rare-earth garnet-structure ferrites materials are generally prepared through chemical methods in the form of submicron to nano-crystalline particles. [6][7][8][9][10][11] These methods involve the use of conventional mixing oxides techniques, 6,7 co-precipitation, 8 monomode microwave, 9 sol-gel methods 10 and mechanochemical methods. 11 However numerous problems associated with diffusion, impurities and agglomeration or pH control have been reported to strongly affect the crystallinity of the synthesis product and its resulting magnetic properties.…”

“…[6][7][8][9][10][11] These methods involve the use of conventional mixing oxides techniques, 6,7 co-precipitation, 8 monomode microwave, 9 sol-gel methods 10 and mechanochemical methods. 11 However numerous problems associated with diffusion, impurities and agglomeration or pH control have been reported to strongly affect the crystallinity of the synthesis product and its resulting magnetic properties. 8,[12][13][14][15] Novel approaches are therefore necessary for the easy and low-cost fabrication of these important materials in the form of flexible free-standing films which could then be of interest for device integration.…”

Synthesis and Characterizations of ZnO Nanoparticles for Application in Electromagnetic Detectors

“…The weakness of this technology is that it can only distinguish liquid and solid but unable to distinguish between water and hydrocarbons. The success rate of this technology is very low (10-30%) [2].The new technology on hydrocarbons exploration is using EM (electromagnetic) waves called Sea Bed Logging (SBL).…”