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Abstract. First principle calculations were employed to investigate the orthorhombic perovskite CaMnO 3 and the impact of reduced oxygen …

CaMnO3 powder prepared by the autocombustion citrate method had the highest electrical conductivity. The optical band gap for all CaMnO3 powders was determined to be in the 1.1–1.2 eV range.

Abstract. Epitaxial CaMnO3 thin films on (001) LaAlO3, (LaAlO3)0.3 (Sr2AlTaO6)0.7, and SrTiO3 were synthesized in a range of strain states from coherently strained on LaAlO3 (1.6% strain) to fully ...

A comprehensive study was performed in order to find the effect of different calcination and sintering conditions on the physical properties of calcium manganite ceramics in dependence of temperature T and partial pressure of oxygen p(O 2).The eventual formation of oxygen vacancies during sintering was investigated and the results …

Oxide heterostructures based on cubic perovskite have been studied widely but there has been little interest in the combination of different polymorphs, such as hexagonal and cubic manganites, into a single heterostructure. This paper reports the growth of heterostructures composed of two manganite compounds

Reflectivity spectra of CaMnO3 and LaMnO3 were measured in a wide photon energy region between 5 meV and 30 eV at room temperature. ... Bi-Mn113 has highest resistivity at the both temperature end ...

The structural, transport, and magnetic properties of CaMn1−xFexO3−δ (0.0 ≤ x ≤ 0.3) have been studied by using resistivity, magnetization, and neutron powder diffraction techniques. The ...

Overall, CaMnO3 ceramic sintered for 24 h demonstrated the best performance, which presented a Figure-of-Merit value of about 0.03. ... Sr 1−3x/2 La x TiO 3 [521], Ca 1−x Bi x MnO 3 [522], Sr ...

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The electron and phonon transports in CaMnO3 and in one of its Bi-doped counterparts, namely, Bi0.03Ca0.97MnO3, are investigated using the thermoelectric transport measurements and first ...

The sequence of Cu substituted Ca 0.9 La 0.05 Bi 0.05 Mn 1-X Cu x O 3 ( x = 0, 0.025, 0.05, 0.075, and 0.1) manganite has been studied and it has effect in the structure. ... The Sr doped CaMnO3 ...

Temperature dependence of S of CaMn 1−x Ta x O 3 (0.02≤ x ≤0.20). The calculation of the power factor (PF= S2 / ρ) shows that the highest PF was reached at x =0.04 samples, which is in consistent with that of the Ca 1−x Bi x MnO 3 system. Fig. 9 shows the temperature dependence of κ for CaMn 0.96 Nb 0.04 O 3 and CaMn 0.96 Ta …

In the modified Bi 0.5 Na 0.5 TiO 3, a single perovskite with distorted structure was obtained due to the random distribution of Ca and Mn cations in the host lattice. The co-modification in A- and B-sites of Bi 0.5 Na 0.5 TiO 3 via Ca and Mn resulted in the reduction of optical band gap and induction of room-temperature ferromagnetism.

Section snippets Sample preparation. The Ca 1−x Bi x Mn 1−y Nb y O 3 (0 ≤ x = y ≤ 0.1, by step 0.02) was prepared by a conventional solid-state reaction method. First, CaMnO 3−δ powder was pre-synthesized with CaCO 3 and MnO 2 powders at 1373 K, and then the calcined powder was pulverized into fine powder with particle size of …

We demonstrate an electric field control of an anomalous Hall effect emerging in CaIrO 3 /CaMnO 3 heterostructures. We fabricate both electron-type and hole-type …

Perovskite manganites CaMn1−y W y O3 (0 ≤ y ≤ 0.05) were synthesized using solid-state reaction technique. The influence of W doping on the structure, charge carrier transports and phonon scattering of CaMnO3 was investigated. Doping was found to increase the carrier concentration, leading to enhanced electrical conductivity and …

The thermoelectric concrete bricks of the III-layer brick type of 27.70 mV displayed output voltage results being higher than those of the I-layer brick of 26.57 mV and the CaMnO3 TEG module ...

Nonstoichiometric perovskite-type calcium−manganese oxides (CaMnO3−δ, 0 < δ ≤ 0.5) were synthesized and investigated for electrochemical oxygen reduction and oxygen …

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The sol–gel prepared (1-x)Na0.5Bi0.5TiO3-(x) CaMnO3 (x = 0, 0.03, 0.06, 0.12) compositions show a Rhombohedral (R3c) phase up to x = 0.06 while a mixed rhombohedral (R3c) and orthorhombic (Pnma) phases for the x = 0.12. The lattice volume consistently decreased with an increase in the CaMnO3 content. The phase transition …

Request PDF | Influence of Dy/Bi dual doping on thermoelectric performance of CaMnO3 ceramics | Ca1−2xDyxBixMnO3 (x = 0.02, 0.05, 0.08 and 0.10) ceramics have been synthesized by solid state ...

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The interplay of crystal structure and thermoelectric properties of A- or B-site substituted high-density calcium manganese oxide ceramics, Ca 1-z A z Mn 1-z M z O 3-δ (A = Bi, Gd, Yb/Gd or M = W with 0 ≤ z ≤ 0.08) is investigated. For the same degree of substitution z, smaller sized substituents cause a unit cell volume contraction and higher …

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We demonstrate an electric field control of an anomalous Hall effect emerging in CaIrO 3 /CaMnO 3 heterostructures. We fabricate both electron-type and hole-type carrier samples by tuning epitaxial strain and, then, control the carrier density in a CaIrO 3 layer via electric double layer gating technique. As the Fermi energy of CaIrO 3 is tuned close to …

бөмбөлөг тээрэм ба Раймонд тээрэм хооронд Хөдөө аж ахуйн малын их бага эмч санитарч тракторчин комбайнч 1995 оноос өмнөх хугацаа хамаарна Үнэ авах …

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Bơm màng Aro 6661T3-3EB-C là dòng sản phẩm bơm màng khí nén của hãng Aro – Ingersoll Rand (USA) với giá thành tốt và hiệu suất hoạt động, độ bền cao đã được kiểm …

The effects of dual doping by trivalent and monovalent cations on the thermoelectric properties of CaMnO3−δ ceramics were investigated. Na⁺ was selected as the monovalent cation, while three ...

Abstract. Electron-doped perovskite Ca 1Àx Bi x MnO 3 (x = 0, 0.02, 0.03, 0.04, 0.06 and 0.10) was prepared by a conven-tional solid-state reaction method. Their homogeneity was confirmed using X ...