A Site-Ordered Quadruple Perovskites, RMn3Ni2Mn2O12 with R = Bi, Ce, and Ho, with Different Degrees of B Site Ordering DOI Creative Commons
Alexei А. Belik

Molecules, Journal Year: 2025, Volume and Issue: 30(8), P. 1749 - 1749

Published: April 14, 2025

A site-ordered quadruple perovskites, AA′3B4O12, can have 3d transition metals at A′ and B sites, show complex magnetic interactions behavior. Additional complexity appears when arrangements are realized in AA′3B2B′2O12. In this work, RMn3Ni2Mn2O12 with R = Bi, Ce, Ho, were prepared by a high-pressure, high-temperature method about 6 GPa 1500 K. The Bi Ce samples found to crystallize space group Im-3 disordered distribution of Ni2+ Mn4+ cations one site. On the other hand, Ho sample crystallized Pn-3 showed partial ordering between two sites. structural data (and bond valence sums) suggest that cerium has oxidation state +3, which is unusual for such perovskites. Magnetic properties investigated susceptibility specific heat measurements, presence near 36 K Bi; there was evidence transitions 27 33 10 Ho. Curie–Weiss parameters estimated all from measurements up 750 total effective moment also suggests Ce3+. field 90 kOe had largest effect on sample, almost no effects sample.

Language: Английский

Perovskite-based transparent pn junction in CuI/SrTiO3 toward enhanced photoelectric response via interfacial homogeneous perovskite LaCoO3 transition layer DOI
Xinyan Lv,

Yang Wei,

Zefeng Cai

et al.

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(9)

Published: March 1, 2025

A transparent pn junction comprising CuI/LaCoO3 QDs/SrTiO3 was synthesized using the solgel-hydrothermal-freeze drying-sputtering in situ iodization method. The achieves transmittance of ∼85%, photoelectric enhancement ∼2.2 × 103-fold to intrinsic CuI/SrTiO3, and good stability 5 months. It can be primarily attributed LaCoO3 QDs. In addition appropriate Fermi level high QY, QDs with carrier inducing–injecting–driving ameliorate dynamics for PCE-transparency balance, meanwhile increasing hole by Cu vacancy. Furthermore, CuI, LaCoO3, SrTiO3 maintain structural potential devices.

Language: Английский

Citations

3
A Site-Ordered Quadruple Perovskites, RMn3Ni2Mn2O12 with R = Bi, Ce, and Ho, with Different Degrees of B Site Ordering DOI Creative Commons
Alexei А. Belik

Molecules, Journal Year: 2025, Volume and Issue: 30(8), P. 1749 - 1749

Published: April 14, 2025

A site-ordered quadruple perovskites, AA′3B4O12, can have 3d transition metals at A′ and B sites, show complex magnetic interactions behavior. Additional complexity appears when arrangements are realized in AA′3B2B′2O12. In this work, RMn3Ni2Mn2O12 with R = Bi, Ce, Ho, were prepared by a high-pressure, high-temperature method about 6 GPa 1500 K. The Bi Ce samples found to crystallize space group Im-3 disordered distribution of Ni2+ Mn4+ cations one site. On the other hand, Ho sample crystallized Pn-3 showed partial ordering between two sites. structural data (and bond valence sums) suggest that cerium has oxidation state +3, which is unusual for such perovskites. Magnetic properties investigated susceptibility specific heat measurements, presence near 36 K Bi; there was evidence transitions 27 33 10 Ho. Curie–Weiss parameters estimated all from measurements up 750 total effective moment also suggests Ce3+. field 90 kOe had largest effect on sample, almost no effects sample.

Language: Английский

Citations

0