Comparison of different sintering methods of Pb 1−x Cr x Te thermoelectric nanocomposites doped with iodine

Królicka, A.; Michalska, Monika

doi:10.1016/j.physb.2017.06.004

Cited by 3 publications

(2 citation statements)

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“…The lattice thermal conductivity depends mainly on crystal lattice disorder scattering, Umklapp scattering, and mass-difference impurity scattering. 7 An ideal thermoelectric material should have a considerable value of power factor ( S 2 σ ) and low thermal conductivity, but their dependence on carrier concentration hinders the growth of the figure of merit.…”

Section: Introductionmentioning

confidence: 99%

Enhancement in the electrical transport properties of CaMnO₃via La/Dy co-doping for improved thermoelectric performance

et al. 2023

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Section: Introductionmentioning

confidence: 99%

Enhancement in the electrical transport properties of CaMnO₃via La/Dy co-doping for improved thermoelectric performance

et al. 2023

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“…In the latter respect, PbTe has acquired a status of the model example when zT doubled after introduction 1-2% of Tl [6]. Thermoelectric properties of PbTe can be also controlled by incorporation of 3d transition metals, such as Mn, Fe or Cr [7,8,9,10,11,12]. Chromium is particularly interesting since Cr substituting for Pb atoms form a mixed valence Cr 2+/3+ donor centers resonant with the PbTe conduction band [8,13,14,15,16].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Constitution of Topologically Trivial Thermoelectric PbTe:Cr

Gas,

Krolicka,

Dybko

et al. 2021

Preprint

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In this paper we report on detailed temperature and magnetic field dependence of magnetization of IV-VI semiconductor PbTe doped with mixed valence transition metal Cr 2+/3+ . The material is studied solely by an integral superconducting quantum interference device magnetometer in order to quantitatively determine the contribution of single substitutional Cr 3+ as well as of various Cr-Te magnetic nanocrystals, including their identification. The applied experimental procedure reveals the presence of about 10 19 cm −3 paramagnetic Cr 3+ ions formed via self-ionization of Cr 2+ resonant donors. These are known to improve the thermoelectric figure of merit parameter zT of this semiconductor. The magnetic finding excellently agrees with previous Hall effect studies thus providing a new experimental support for the proposed electronic structure model of PbTe:Cr system with resonant Cr 2+/3+ state located (at low temperatures) about 100 meV above the bottom of the conduction band. Below room temperature a ferromagnetic-like signal points to the presence of Cr-rich nanocrystalline precipitates. Two most likely candidates, namely: Cr 2 Te 3 and Cr 5 Te 8 are identified upon dedicated temperature cycling of the sample at the remnant state. As an ensemble, the nanocrystals exhibits (blocked) superparamagnetic properties. The magnetic susceptibility of both n-and p-type PbTe in the temperature range 100 < T < 400 K has been established. These magnitudes are essential in proper accounting

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Magnetic constitution of topologically trivial thermoelectric PbTe:Cr

Gas

Królicka

Dybko

et al. 2021

Journal of Magnetism and Magnetic Materials

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Comparison of different sintering methods of Pb 1−x Cr x Te thermoelectric nanocomposites doped with iodine

Cited by 3 publications

References 31 publications

Enhancement in the electrical transport properties of CaMnO₃via La/Dy co-doping for improved thermoelectric performance

Enhancement in the electrical transport properties of CaMnO₃via La/Dy co-doping for improved thermoelectric performance

Magnetic Constitution of Topologically Trivial Thermoelectric PbTe:Cr

Magnetic constitution of topologically trivial thermoelectric PbTe:Cr

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Comparison of different sintering methods of Pb 1−x Cr x Te thermoelectric nanocomposites doped with iodine

Cited by 3 publications

References 31 publications

Enhancement in the electrical transport properties of CaMnO3via La/Dy co-doping for improved thermoelectric performance

Enhancement in the electrical transport properties of CaMnO3via La/Dy co-doping for improved thermoelectric performance

Magnetic Constitution of Topologically Trivial Thermoelectric PbTe:Cr

Magnetic constitution of topologically trivial thermoelectric PbTe:Cr

Contact Info

Product

Resources

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Enhancement in the electrical transport properties of CaMnO₃via La/Dy co-doping for improved thermoelectric performance

Enhancement in the electrical transport properties of CaMnO₃via La/Dy co-doping for improved thermoelectric performance