Synthesis and characterization of Dy 3 Fe 5 O 12 nanoparticles fabricated with the anion resin exchange precipitation method

Abstract

Dysprosium-iron garnet (DyIG) nanoparticles were synthesized with the new modification of the anion resin exchange precipitation method. Nanoparticles structure and morphology were characterized by the Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and transmission electron microscopy (TEM). The magnetic properties were studied by using a QUANTUM Design MPMS-XL system and the visible magnetic circular dichroism (MCD). The nanoparticles synthesized were of the garnet structure with an excellent crystallinity. Nanoparticles magnetic properties were close to that of the bulk DyIG crystals. Nanoparticles magnetization dependence on an external magnetic field demonstrates narrow hysteresis loop and the strong magnetization increase in high fields. Visible MCD of DyIG was studded here for the first time. The MCD spectral and temperature dependences allowed to separate contributions of the Fe and Dy sub-lattices to this effect and to analyze each sub-lattice temperature behavior.

Synthesis and Characterization of Core–Shell Magnetic Nanoparticles NiFe2O4@Au

“…On the other hand, the study of the spectral dependences of MCD provides information on electronic excitations in a substance under the influence of optical radiation and allows one to obtain the structure of excited levels characteristic of each substance. To carry out the MCD measurements, transparent composite plates containing the NiFe 2 O 4 NPs were prepared according to the method described in [26]. Measurements were carried out in the spectral range of 1.3-3.9 eV in a magnetic field of 1.3 T at the temperature of 300 K also analogously to [26].…”

“…To carry out the MCD measurements, transparent composite plates containing the NiFe 2 O 4 NPs were prepared according to the method described in [26]. Measurements were carried out in the spectral range of 1.3-3.9 eV in a magnetic field of 1.3 T at the temperature of 300 K also analogously to [26]. The measurement accuracy was about 10 −4 , and the spectral resolution was 20-50 cm −1 depending on the wavelength.…”

Magnetic circular dichroism in the canted antiferromagnet α-Fe2O3: Bulk single crystal and nanocrystals

“…To carry out the MCD, FR, and optical absorption measurements, transparent composite plates containing the nanoparticles were prepared as it was described in [33]. The nanoparticles powder was mixed with dielectric transparent silicon-based glue ("Rayher" art no 3338100 80 ml) in the weight proportion 0.5:100 and measures were undertaken to obtain the homogeneous particles distribution using an ultrasonic bath.…”

Reactive Sintering of Dysprosium-Iron Garnet via a Perovskite-Hematite Solid State Reaction and Physical Properties of the Material

“…Other applications include waveguide optical isolators and Faraday rotators [ 14 ], magnonic devices [ 15 ], microwave devices [ 16 ], and sub-GHz wireless applications [ 17 ]. Moreover, they can be utilized in magnetic refrigeration devices [ 18 ], laser sources of radiation [ 19 ], electrochemical hydrogen storage [ 20 ], or as microwave components–circulators [ 21 ] (in this case, the authors have proven that their rare-earth iron garnet material is suitable for operation in the K α band in the communication industry), antennas, isolators, and so on [ 22 ].…”

“…Several methods have been developed for synthesizing yttrium iron garnet and its rare-earth containing counterparts. These include co-precipitation [ 23 , 24 ], the sol-gel method [ 25 , 26 , 27 ], high-energy ball milling [ 28 ], mechanochemical processing [ 29 ], glycine assisted combustion method [ 30 ], citrate and solid-state reaction method [ 31 ], anion resin exchange precipitation method [ 19 ], or the micro-pulling-down method [ 32 ]. The most common way to obtain rare-earth iron garnets is reactive sintering between oxides [ 33 ].…”