Structural aspects and magnetoelectric behavior of hexagonal Sr1-xBaxMnO3 (x=0, 0.4) manganites: Effect of leakage currents

Isaza-Zapata, V.; Maya, C.E.; Gómez, Andrés Ávila; Bezzon, Vinícius Danilo Nonato; Supelano, G. I.; Saavedra, I.; Parra, Carlos; Astudillo, Jairo A.; Bolaños, G.; Dionizio, S.; Izquierdo, J.L.; Morán, O.

doi:10.1016/j.physleta.2022.128019

Cited by 2 publications

(3 citation statements)

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“…Also of note, it could be worth to study inorganic perovskites of A 1-x B x MnO 3 type, where A and B are some combination of Ca, Sr, Ba and La, as it is expected that introduction of doping could modify electronic and optical properties of materials. [26,[55][56][57] Experimental Section Synthesis and characterization: Pure manganites (CaMnO 3 , SrMnO 3 , BaMnO 3 , LaMnO 3 ) were synthesised using citrate-nitrate autocombustion method. Nitrate solutions of Ca 2 + , Sr 2 + , Ba 2 + or La 3 + cations were obtained by dissolving calcium carbonate (CaCO 3 , 99 %, T.T.T.…”

Section: Discussionmentioning

confidence: 99%

“…For now, we believe results presented in this paper are motivating enough to improve the synthesis methods of manganite perovskites for potential solar cell use. Also of note, it could be worth to study inorganic perovskites of A 1– x B x MnO 3 type, where A and B are some combination of Ca, Sr, Ba and La, as it is expected that introduction of doping could modify electronic and optical properties of materials [26,55–57] …”

Section: Discussionmentioning

confidence: 99%

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Potential of AMnO₃ (A=Ca, Sr, Ba, La) as Active Layer in Inorganic Perovskite Solar Cells

et al. 2023

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Inorganic perovskite CaMnO 3 ${{}_{3}}$ was proposed as a substitution for the TiO 2 ${{}_{2}}$ anatase in electron transport layers of solar cells containing the hybrid perovskite CH 3 ${{}_{3}}$ NH 3 ${{}_{3}}$ PbI 3 ${{}_{3}}$ based on increased mobility of electrons and better optical matching. Due to a suitable band gap concerning the absorption of sunlight, we investigate the potential of CaMnO 3 ${{}_{3}}$ and similar manganite perovskites, where Ca is replaced by either Sr, Ba or La, as an absorber layer in inorganic perovskite solar cells. In this study, we have used optical measurements on the synthesized AMnO 3 ${{}_{3}}$ (A=Ca, Sr, Ba, La) samples to aid density functional theory calculations (DFT) in order to accurately simulate the electronic and optical properties of AMnO 3 ${{}_{3}}$ compounds and gauge their potential for the role of absorber layer. Both experimental measurements and theoretical calculations show suitable band gap of 1.1‐1.5 eV, depending on the compound, and absorption coefficients of the order of 105 ${{10}^{5}}$ cm -1 ${{}^{-1}}$ in the visible part of the spectrum.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Potential of AMnO₃ (A=Ca, Sr, Ba, La) as Active Layer in Inorganic Perovskite Solar Cells

et al. 2023

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“…Strontium manganese oxides, SrMnO 3−δ , are well-known materials that crystallize in pseudocubic or hexagonal structural frameworks with properties that strongly depend on various chemical and thermodynamic tuning parameters, including chemical substitution, site occupancy, oxygen stoichiometry, and synthesis conditions. − For example, widely varying antiferromagnetic (AFM) transition temperatures, T N , between ∼230 and 260 K ,− have been reported for cubic SrMnO 3 with the large discrepancies attributed to various synthesis conditions and possible oxygen off-stoichiometry . The effects of significant oxygen off-stoichiometry and the related charge states of Mn are best showcased through the large enhancement of T N to ∼380 K in orthorhombic brownmillerite SrMnO 2.5 . ,, On the other hand, hexagonal 4H- and 6H-SrMnO 3 phases were shown to display AFM properties below ∼278 to 280 K ,,− and 235–240 K, respectively. , …”

Section: Introductionmentioning

confidence: 99%

Redox Properties of Hexagonal and Cubic Sr_0.4Ba_0.6Mn_0.94Ti_0.06O_3−δ Investigated by In Situ Neutron Powder Diffraction

Krivyakina

Poudel

et al. 2023

Chem. Mater.

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The synthesis and structural properties of polycrystalline cubic and hexagonal Sr0.4Ba0.6Mn0.94Ti0.06O3−δ have been investigated using a combination of in situ neutron diffraction and thermogravimetric analysis. The experiments were conceived to replicate and explain key synthesis processes involving switching between different reducing and oxidizing atmospheres designed to transform a hexagonal phase into an oxygen-deficient cubic perovskite phase in which Mn ions are in their trivalent oxidation state. Hydrogen reduction of the hexagonal phase first produces a heavily oxygen-deficient hexagonal phase preceding to full decomposition of the material. Remarkable reversible properties of the parent hexagonal structure are observed with the phase recovered within minutes by reoxidation of the material after it was decomposed in hydrogen-containing atmospheres. The partial substitution of large Ba ions at the Sr sites enhances the strains and creates wide channels, enabling the rapid oxidation of the oxygen-deficient cubic phase. The fast oxygen intake results in a phase separation between oxygen-rich and oxygen-poor phases with no evidence for any vacancy-ordered superstructures as those previously seen in the parent Ba- and Ti-free SrMnO3−δ system.

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Structural aspects and magnetoelectric behavior of hexagonal Sr1-xBaxMnO3 (x=0, 0.4) manganites: Effect of leakage currents

Cited by 2 publications

References 23 publications

Potential of AMnO₃ (A=Ca, Sr, Ba, La) as Active Layer in Inorganic Perovskite Solar Cells

Potential of AMnO₃ (A=Ca, Sr, Ba, La) as Active Layer in Inorganic Perovskite Solar Cells

Redox Properties of Hexagonal and Cubic Sr_0.4Ba_0.6Mn_0.94Ti_0.06O_3−δ Investigated by In Situ Neutron Powder Diffraction

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Structural aspects and magnetoelectric behavior of hexagonal Sr1-xBaxMnO3 (x=0, 0.4) manganites: Effect of leakage currents

Cited by 2 publications

References 23 publications

Potential of AMnO3 (A=Ca, Sr, Ba, La) as Active Layer in Inorganic Perovskite Solar Cells

Potential of AMnO3 (A=Ca, Sr, Ba, La) as Active Layer in Inorganic Perovskite Solar Cells

Redox Properties of Hexagonal and Cubic Sr0.4Ba0.6Mn0.94Ti0.06O3−δ Investigated by In Situ Neutron Powder Diffraction

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Potential of AMnO₃ (A=Ca, Sr, Ba, La) as Active Layer in Inorganic Perovskite Solar Cells

Potential of AMnO₃ (A=Ca, Sr, Ba, La) as Active Layer in Inorganic Perovskite Solar Cells

Redox Properties of Hexagonal and Cubic Sr_0.4Ba_0.6Mn_0.94Ti_0.06O_3−δ Investigated by In Situ Neutron Powder Diffraction