Thermal Conductivity of a Nanoscale Yttrium Iron Garnet Thin-Film Prepared by the Sol-Gel Process

Kim, Yun Young

doi:10.3390/nano7090247

Cited by 8 publications

(6 citation statements)

References 35 publications

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“…Figure 1 shows the XRD patterns Y1-xNdxFe5Y12 (x = 0.0, 0.2, 0.5, 0.8) samples. The relevant peaks for garnet structure (400), (420), and (422) are sharply reflected, , as matched by ICSD reference code 980021229, 980064818, and 980064820, each possessing a cubic crystal structure and belonging to space group Ia-3d [1,7,8]. The substitution of Nd 3+ ion to Y 3+ ion position resulted in strains induced in the lattice.…”

Section: Resultsmentioning

confidence: 70%

Synthesis, Structure, Magnetic and Absorption Properties of Nd Doped Y3Fe5O12 Garnets Prepared by Mechanochemical Method

Winatapura

Mulyawan

Adi

et al. 2020

KEM

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Neodymium substituted yttrium iron garnet (YIG) nanoparticles with compositional variation of NdxY3−xFe5O12 where x = 0.0, 0.2, 0.5 and 0.8 was prepared by mechanochemicals method using high energy milling (HEM). The characterization was done using X-rays diffractometer (XRD), scanning electron microscope (SEM), vibrating sample magnetometer (VSM) and vector network analyzer (VNA). It was found that the mechanical milling followed by sintering promotes the complete structural formation of the yttrium iron garnet (YIG) structure. The XRD patterns confirm the complete introduction of Nd3+ ion into the YIG with an addition of Nd doping concentration. nanocrystalline particles with high purity and sizes ranging from 0.12μm to 0.16μm were obtained. The magnetization value, Ms from all Nd-doped samples were obtained in the range between 34 to 37emu.g-1. The magnetic coercivity (Hc) was achieved of 0.012kOe (12Oe) for the non-doped sample (YNd-0) and then increase with the addition of neodymium concentration. The increase in Hc for all the sample series can be attributed to an enhancement of the magnetocrystalline anisotropy with anisotropic Fe2+. The variation of the reflection loss (RL) versus frequency was observed in Nd doped YIG, Y1-xNdxFe5O12 with x = 0.0 – 0.8 in the frequency range of 7 –12 GHz. The optimum reflection loss (RL) was found to be 8.66(-dB) at 9.5GHz in Y2.2Nd0.8Fe5O12 (YNd-08) for x = 0.8.

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Section: Resultsmentioning

confidence: 70%

Synthesis, Structure, Magnetic and Absorption Properties of Nd Doped Y3Fe5O12 Garnets Prepared by Mechanochemical Method

Winatapura

Mulyawan

Adi

et al. 2020

KEM

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“…The movement of a delay line, which was a retroreflective mirror mounted on a motorized linear stage, was configured to have time steps of 2.7 ps/pt and 0.5 ps/pt for the thermal and ultrasonic responses, respectively. A detailed schematic of the optical setup is presented elsewhere [ 7 ]. Each sample was measured three times at the same spot and the results were averaged.…”

Section: Methodsmentioning

confidence: 99%

Thermal and Mechanical Properties of Amorphous Silicon Carbide Thin Films Using the Femtosecond Pump-Probe Technique

Kim

2022

Materials

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Nanoscale amorphous silicon carbide (a-SiC) thin films are widely used in engineering applications. It is important to obtain accurate information about their material properties because they often differ from those of the bulk state depending on the fabrication technique and process parameters. In this study, the thermal and mechanical properties of a-SiC thin films were evaluated using the femtosecond pump-probe technique, which provides high spatial and temporal resolutions sufficient to measure films that have a thickness of less than 300 nm. a-SiC films were grown using a plasma-enhanced chemical vapor deposition system, and the surface characteristics were analyzed using ellipsometry, atomic force microscopy, and X-ray reflectometry. The results show that the out-of-the-plane thermal conductivity of the films is lower than that of bulk crystalline SiC by two orders of magnitude, but the lower limit is dictated by the minimum thermal conductivity. In addition, a decrease in the mass density resulted in a reduced Young’s modulus by 13.6–78.4% compared to the literature values, implying low Si-C bond density in the microstructures. The scale effect on both thermal conductivity and Young’s modulus was not significant.

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“…5,6 Among all the magneto-optical crystals, yttrium iron garnet (Y 3 Fe 5 O 12 , abbreviated as YIG) crystal has attracted significant attention in the near-infrared (NIR) and mid-infrared (MIR) bands due to its excellent magneto-optical properties. 7,8 The commercial YIG crystals are reported to possess high Faraday rotation angle (FRA) at 1310 nm (220°/cm) and 1550 nm (180°/cm). 9 Compared to pure YIG crystals, rare earth-doped YIG crystals are expected to have better magnetooptical and magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

“…Magneto-optical isolators are widely used in industrial lasers, optical communications, large data transmission, and other fields due to their simple structure, reliable, and stable performance. − The magneto-optical crystal is the core component that determines the performance of the isolator . In the past few years, with the continuous expansion of industrial laser applications, higher demands have been placed on the performance and size of magneto-optical crystals. , Among all the magneto-optical crystals, yttrium iron garnet (Y 3 Fe 5 O 12 , abbreviated as YIG) crystal has attracted significant attention in the near-infrared (NIR) and mid-infrared (MIR) bands due to its excellent magneto-optical properties. , …”

Section: Introductionmentioning

confidence: 99%

Effect of Gadolinium Addition on Magnetic and Magneto-Optical Properties of Yttrium Iron Garnet Crystal

Duan,

Yang,

Wang

et al. 2024

Crystal Growth & Design

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Miniaturization and integration of the isolation device are new requirements in the emerging magneto-optical field due to the development of near and mid-infrared high-power solid-state lasers. In order to optimize the comprehensive properties of Y3Fe5O12 crystal, the effect of Gd3+ ions doping crystal was investigated in this paper. Gd1.3Y1.7Fe5O12 (abbreviated as GYIG) single crystal was grown by the top seeded solution growth method. The saturation magnetization is 14.4 emu/g, and the transmittance is more than 70%. At 1310 and 1550 nm, the Faraday rotation angles (FRAs) are 174 and 130°/cm. Experimental evidence suggests that annealing in an oxygen atmosphere can greatly reduce the concentration of Fe2+ ions and oxygen vacancy defects, resulting in ∼5% increase in transmittance and FRA. These results provide valuable clues to the effects of rare earths for magneto-optical crystals.

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Thermal Conductivity of a Nanoscale Yttrium Iron Garnet Thin-Film Prepared by the Sol-Gel Process

Cited by 8 publications

References 35 publications

Synthesis, Structure, Magnetic and Absorption Properties of Nd Doped Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> Garnets Prepared by Mechanochemical Method

Synthesis, Structure, Magnetic and Absorption Properties of Nd Doped Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> Garnets Prepared by Mechanochemical Method

Thermal and Mechanical Properties of Amorphous Silicon Carbide Thin Films Using the Femtosecond Pump-Probe Technique

Effect of Gadolinium Addition on Magnetic and Magneto-Optical Properties of Yttrium Iron Garnet Crystal

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