Ellipsometric analysis of isothermally devitrified metallic glasses

Uzun, Ceren; Meduri, Chandra Sekhar; Jagdale, Shweta; Kumar, Golden; Bernussi, A. A.

doi:10.1016/j.omx.2021.100095

Cited by 1 publication

(1 citation statement)

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“…[17] Moreover, in the study of the optical properties of metallic glass, Tarigan et al used the Drude model to fit the refractive index and extinction coefficient in the wavelength range from 250 to 2500 nm of a smooth-surface sample of bulk Pt 57.5 Cu 14.7 Ni 5.3 P 22.5 metallic glass. [18] The internal lattice-free structure of metallic glass implies that the arrangement of its atoms is in a chaotic state, causing the electrons to collide more frequently when they move in metallic glass films. Electromagnetic waves can cause the free electrons within the metal to vibrate and reflect waves with the same amplitude but with opposite phases, such that the reflection of the metal is high.…”

Section: Introductionmentioning

confidence: 99%

Emissivity and Optical Properties of Thin‐Film Metallic Glass in the Thermal Infrared Region

Lai,

Hsiao,

Wang

et al. 2023

Advanced Optical Materials

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This study displays the emissivities and optical properties of thin‐film metallic glasses in the thermal infrared (IR) region. It is found that the amorphous structure of the metallic glass hinders the movement of electrons, leading to unique optical properties in the thermal IR region. Measurements of the optical constants of NiNb thin‐film metallic glasses reveal that a high processing pressure and sputtering power yield high optical conductivity and a low damping constant. Adjusting the parameters of the sputtering processes allows the fabrication of thin‐film metallic glasses with a range of damping constants and also the change in the reflectance and emissivity. Applying optical thin film theory, the emissivity of thin‐film metallic glass in the thermal IR region can be modulated. The measured emissivity of the thin‐film metallic glass (45.35%) is significantly enhanced when compared with that of a Si substrate or metal film. Furthermore, the cooling ability of the optimal metallic glass is much higher than that of Si and metal films. These findings reveal that metallic glass films can display thermal radiative properties superior to those of metals and semiconductors, making them promising materials for use in electronic devices with excellent mechanical characteristics and heat dissipation properties.

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Section: Introductionmentioning

confidence: 99%