Lead germanium telluride: a mechanically robust infrared high-index layer

Li, Bin; Xie, Ping; Zhang, Suying; Liu, Dingquan

doi:10.1007/s10853-011-5327-9

Cited by 26 publications

(15 citation statements)

References 11 publications

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“…The MnTe crystallizes in the hexagonal structure of the NiAs type ( [13] and references therein), the metastable, zinc blende phase of this compound only can also be obtained by MBE (see, e.g., [14]). The observed qualitative composition dependence of the microhardness in (Sn,Mn)Te thin layers is similar to that observed in (Pb,Sn)Te bulk crystal [15] but differs significantly from that recently observed for several PbTe-based solid solutions containing Cd [16,17], Ge [18], or Ca [19]. For example using the same experimental setup the determined Young modulus was also a constant value in (Pb,Cd)Te solid solution but the microhardness increased by almost 50% in a similar composition range [17].…”

Section: Resultssupporting

confidence: 66%

“…The microhardness of (Pb,Zn)Se and (Pb,Cd)Se solid solutions containing up to a few percent of Zn and Cd, respectively, also significantly increases with an increasing dopant metal content [20]. In the case of (Pb,Ge)Te bulk crystals both the microhardness and the Young modulus values were significantly higher for the solid solution containing 10% of Ge than those for PbTe [18].…”

Section: Resultsmentioning

confidence: 94%

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Microhardness and the Young Modulus of Thin, MBE-Grown, (Sn,Mn)Te Layers Containing up to 8% of Mn

et al. 2017

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The thin layers of (Sn,Mn)Te solid solution were grown by molecular beam epitaxy onto (111)-oriented BaF2 substrates and characterized by scanning electron microscopy, atomic force microscopy, energy dispersive X-ray spectrometry, and X-ray diffraction methods. The epitaxial character of the growth was confirmed. All the layers exhibited a regular (fcc) structure of the rock-salt type and were (111)-oriented, their thickness was close to about 1 µm. The layers contained up to 8% of Mn. The microhardness and the Young modulus values were determined by the nanoindentation measurements. The Berkovich type of the intender was applied, the maximum applied load was equal to 1 mN. The results of measurements demonstrated a lack of the composition dependence of the Young modulus value. A slight increase of the microhardness value with an increasing Mn content in the (Sn,Mn)Te solid solution was observed.

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Section: Resultssupporting

confidence: 66%

Section: Resultsmentioning

confidence: 94%

Microhardness and the Young Modulus of Thin, MBE-Grown, (Sn,Mn)Te Layers Containing up to 8% of Mn

et al. 2017

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“…A softening of PbTe by alloying of this compound with small amount of SnTe (up to 3%) was demonstrated in [1], solid (Pb,Ca)Te solution containing up to 6% of CaTe was the topic of recent studies [5]. Up to our knowledge in the case of thin PbTe-based layers the alloying was limited to the GeTe only with its content not higher than 22% [6,7]. A hardening of PbTe crystals by alloying it with CdTe was suggested a long * corresponding author; e-mail: szusz@ifpan.edu.pl time ago [3], but due to lack of access to the (Pb,Cd)Te solid solutions with good structure quality these studies were limited to samples with one nominal CdTe content equal at least to 3% in the past.…”

Section: Introductionmentioning

confidence: 99%

Hardening of (Pb,Cd)Te Crystal Lattice with an Increasing CdTe Content in the Solid Solution

et al. 2016

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Single crystals of the (Pb,Cd)Te solid solution with CdTe content up to 9% were grown by self-selecting vapour growth method and investigated by powder X-ray diffraction, inelastic neutron scattering, and nanoindentation measurements. The analysis of the linear part of the LA phonon dispersion, determined by the inelastic neutron scattering demonstrated an increase of the sound velocity (thus the hardening of the crystal lattice) with an increase of CdTe content in the solid solution. An important increase of microhardness value for (Pb,Cd)Te was directly confirmed by results of nanoindentation measurements performed for a few samples with various chemical composition.

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“…As far as the single-crystal of PbTe is concerned, the microhardness is relatively a constant of $30 HV for the various carrier concentrations [46,47]. To the author's best knowledge, no data is reported on hardness of layer of PbTe.…”

Section: The Mechanical Properties Of Evaporated Layers Of Pb 1àx Ge mentioning

confidence: 99%

Infrared High-Index Coating Materials, PbTe and Pb1−xGexTe: Properties and Applications

Li¹,

Xie²,

Zhang³

et al. 2019

Coatings and Thin-Film Technologies

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The greater value of refractive index for high-index layers in thin-film interference filters operating in the infrared has an incomparable advantage. Lead telluride (PbTe), which is much superior to other infrared high-index coating materials due to its high index and advantage of fundamental absorption edges, has played an important role in filters employed in the infrared radiometer and other instruments launched in space atmosphere sounding research projects. In this chapter, we summarized some recent achievements in the investigations into another infrared high-index coating material-lead germanium telluride (Pb 1Àx Ge x Te), a pseudo-binary alloy of PbTe and GeTe. It can be revealed that the layers of Pb 1Àx Ge x Te exhibit the tunable optical properties, such as temperature coefficient of refractive index and fundamental absorption edge, as well as mechanical properties, such as the hardness and Young's modulus, corresponding to its intrinsic ferroelectric phase transition. Some important applications in thin-film interference filters were also demonstrated for its tremendous potential, such as a stable narrow bandpass interference filter without temperature-induced wavelength shift and a tunable infrared short wavelength cutoff filter. Furthermore, it is also revealed that electron beam evaporation is a more effective congruent-transfer technique to deposit the layers of Pb 1Àx Ge x Te.

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Lead germanium telluride: a mechanically robust infrared high-index layer

Cited by 26 publications

References 11 publications

Microhardness and the Young Modulus of Thin, MBE-Grown, (Sn,Mn)Te Layers Containing up to 8% of Mn

Microhardness and the Young Modulus of Thin, MBE-Grown, (Sn,Mn)Te Layers Containing up to 8% of Mn

Hardening of (Pb,Cd)Te Crystal Lattice with an Increasing CdTe Content in the Solid Solution

Infrared High-Index Coating Materials, PbTe and Pb1−xGexTe: Properties and Applications

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