The Thermal Conductivity of Monocrystalline Gallium Garnets Doped with Rare‐Earth Elements and Chromium in the Range 6–300 K

Abstract

The effect of the additions of rare-earth elements Nd, Sm, Eu and Tb on the thermal conductivity of gadolinium-gallium garnets and besides the influence of the joint doping with Nd and Cr on the thermal conductivity of gadolinium-gallium and more compound gadolinium-scandium-gallium, gadolinium-calcium-magnesium-zirconium-gallium and yttrium-scandium-gallium garnets have been investigated.

Crystal Growth and Glass-Like Thermal Conductivity of Ca3RE2(BO3)4 (RE = Y, Gd, Nd) Single Crystals

“…The facilities and procedure of the measurements are described in detail in [16]. To provide flatness of the isothermal surfaces, a resistive heater was fixed on the end face of the sample.…”

Spectral kinetic properties of Yb3+:Na4Y6F22 and Yb3+:LiLuF4 crystals

“…The optic axis of the LLF crystal is parallel to the c axis; the refractive index is ≈1.46. Figure 1 shows the temperature dependence of the thermal conductivity of the crystalline samples, k(T), which we measured by the absolute steady-state longitudinal heat flux method [9] in the temperature range 50-300 K. In the case of NYF crystals, the thermal conductivity proved to be very low, and at T = 300 K it was only 1.6 ± 0.1 W/m⋅K for nominally pure NYF and 1.5 ± 0.1 W/m⋅K for doped NYF (NYF:Yb). Furthermore, we observe an increase in k(T) as the temperature increases.…”

Thermal conductivity of single crystals of Ca1 − x Er x F2 + x and Ca1 − x Tm x F2 + x solid solutions

“…The measurement equipment and technique were described in [8]. The error of determination of the absolute value of thermal conductivity was no larger than ±5%; the precision of the results obtained was no worse than ±3%.…”