Thermophysical properties of manganese monotelluride from 298 to 700 K. Lattice constants, magnetic susceptibility, and antiferromagnetic transition

Grønvold, Fredrik; Kveseth, Nils Jørgen; Marques, Fernando Dos Santos; Tichý, J

doi:10.1016/0021-9614(72)90001-8

Cited by 19 publications

(9 citation statements)

References 21 publications

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“…Unfortunately, the present information concerning the linear expansion coefficients and other possible structure modifications of α‐MnTe above room temperature is rather limited. The values of both lattice parameters and they behavior at a few temperatures only above RT can be found in Refs . respectively.…”

Section: Introductionmentioning

confidence: 52%

Unit‐cell dimensions of α‐MnTe in the 295 K – 1200 K temperature range

et al. 2015

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Unit cell dimensions of high-quality MnTe crystals with NiAs structure were analyzed at temperatures ranging from 295 K to 1200 K. First, the X-ray diffraction were carried out on powdered sample at room temperature using the laboratory diffractometer. Next, the diffraction patterns in a wide temperature range were accumulated with the use of synchrotron radiation. The Rietveld refinement to all experimental data was applied. The average values of linear expansion coefficients in a and c direction are reported. The observed presence of MnTe 2 impurity phase in the temperature range from about 500 K to 1050 K is attributed to decomposition of a small fraction of MnTe during heating.

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Section: Introductionmentioning

confidence: 52%

Unit‐cell dimensions of α‐MnTe in the 295 K – 1200 K temperature range

et al. 2015

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“…This difference could be explained only by residual thermal tensile strain, but in the case of ␤-MnTe grown on Al 2 O 3 substrate this strain should be compressive, because the thermal expansion coefficients are: α ␤-MnTe = 5 × 10 −6 K −1 [1] and α sapphire = 6.22 × 10 −6 K −1 [16] (more detailed explanation pertaining to the residual thermal strain is discussed below). In this way, the second possible interpretation was eliminated.…”

Section: Resultsmentioning

confidence: 97%

“…Let us notice that if TEC of a layer material is not known (the case of metastable phases) it is possible to evaluate the linear TEC of it by similar calculations provided that: (3) and (4): a = 4.48 ± 0.01Å; c = 7.32 ± 0.01Å a = 4.143 ± 0.001Å; c = 6.708 ± 0.003Å [16] ZnTe Experimental: a = 6.103 ± 0.001Å [18] Calculated from formulas (3) and (4) --the TEC-value of substrate is known; -the growth temperature T S is smaller than the temperature of thermal strain generation; -the layer is relaxed at the T S (the case of large lattice mismatch and thick layers).…”

Section: Resultsmentioning

confidence: 99%

“…The tensile strain present in the ␣-MnTe layers indicates that TEC of ␣-MnTe should be higher than that of the sapphire. We have found in the literature three experimental values of TEC for ␣-MnTe calculated as mean values in the given temperature range: α a = 20 × 10 −6 K −1 (the temperature range 175-360 K) [14], α a = 24 × 10 −6 K −1 (the temperature range 253-360 K) [15] and α a = 21 × 10 −6 K −1 (the temperature range 293-673 K) [16]. All these values are really higher than that for sapphire: α a = 6.22 × 10 −6 K −1 [17].…”

Section: Resultsmentioning

confidence: 99%

“…It is known from earlier studies [4,5] that ␣-MnTe layers grown on sapphire substrate exhibit at room temperature a significant residual tensile strain, the unit cell parameters of such layers were: a = 4.166Å and c = 6.694Å, while the values for the bulk material are: a = 4.143Å and c = 6.708Å [11][12][13]16]. The most probable reason of such strain is difference between the thermal expansion coefficients α (TEC) of substrate and layer materials (TEC mismatch), the lattice mismatch at growth temperature T S for ␣-MnTe/Al 2 O 3 heterostructure is ∼12% which means that the so thick layer must be fully relaxed.…”

Section: Resultsmentioning

confidence: 99%

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Tellurium Treatment for the Modification of Sulfide Inclusions and Corresponding Industrial Applications in Special Steels: A Review

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In 1782, Franz-Joseph Müller von Richenstein, a chemist, discovered a rare element with properties similar to those of selenium (Se). In 1798, Martin H. Klaproth, a German chemist, rediscovered this semi-metallic substance and named it tellurium (Te). [1] Te is mainly concentrated in scattered telluride minerals, sulfide mineral structure of most gold deposits, and bismuth tailings. However, in nature, Te appears in quantities that are considered negligible [2] and is mainly extracted from the ore. Generally, concentrations of 1% to 4% Te can be recovered from the anode slime of an electrolytic copper (Cu) refinery. [3] It has been reported that seafloor ferromanganese nodules are rich in Te; however, the recovery of seafloor minerals is still in its infancy. [3] In organic chemistry, Te can also be produced by the reaction of organic matter with metal compounds of Te. [4] Te plays an important role in chemicals, electronics, inorganic nonmetallic materials, metallurgy, and other industries. [5][6][7][8] Tellurides are considered excellent materials for thermoelectric technologies. [9][10][11][12][13] Te is also widely used nonferrous metallurgy and iron and steel metallurgy. Te can significantly improve the properties of Cu-, tin (Sn)-, and lead (Pb)-based alloys, steels, and cast irons. In the iron and steel metallurgical industry, Te is usually utilized as an added element in steels to refine the grains, regulate the morphology and occurrence state of sulfides in steels, and improve the mechanical properties of steels. [14,15] Te is widely used to increase the machinability of steels. Therefore, Te-bearing steel is typically used to manufacture parts with high precision, high surface quality, and rapid cutting. The forms of Te in different type of steel vary. In addition to the usual states of Fe 1.2 Te and MnTe, [16,17] PbTe [18] is formed in Pb-alloyed steels; Cr 2 Te 3 , [19,20] stainless steels; and CuTe, Cu-alloyed steels. [21] In addition, composite particles formed by telluride and sulfide have been reported in Te-treated sulfur (S)-bearing steel. [22][23][24] In recent years, Te has been added to S-bearing steels, such as free-cutting steel and medium-carbon microalloyed steel, also called nonquenched and tempered steel (NQTS) in China, to reduce the aspect ratio of sulfide and the anisotropy of steel. [23,24]

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Thermophysical properties of manganese monotelluride from 298 to 700 K. Lattice constants, magnetic susceptibility, and antiferromagnetic transition

Cited by 19 publications

References 21 publications

Unit‐cell dimensions of α‐MnTe in the 295 K – 1200 K temperature range

Unit‐cell dimensions of α‐MnTe in the 295 K – 1200 K temperature range

The crystallographic structure of thin Mn-rich ZnMnTe layers grown by molecular beam epitaxy

Tellurium Treatment for the Modification of Sulfide Inclusions and Corresponding Industrial Applications in Special Steels: A Review

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