New 10H perovskites Ba5Ln1−xMn4+yO15−δ with spin glass behaviour

Yin, Congling; Tian, Genfang; Li, Guobao; Liao, Fuhui; Lin, Jianhua

doi:10.1039/c7ra02183f

Cited by 7 publications

(4 citation statements)

References 31 publications

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“…For example, a conventional perovskite formed by three cubic (ccc, i.e., ABC) packed AX 3 layers is denoted as 3C (e.g., SrTiO 3 ), a perovskite with only hexagonal packing (hh, i.e., AB) is denoted as 2H (e.g., BaNiO 3 and CsNiCl 3 ), the hexagonal polytype with four cubic and two hexagonal AX 3 layers, (cch) 2 , in a hexagonal primitive cell is denoted as 6H (e.g., RbMgF 3 or BaFeO 3 ), and so on. To specifically define each hexagonal polytype, a combination of Ramsdell and Jagodzinski notations is unambiguous, e.g., 10H (hhccc) 2 , 10H (hhhcc) 2 , and 10H (hcccc) 2 …”

Section: Introductionmentioning

confidence: 99%

“…To specifically define each hexagonal polytype, a combination of Ramsdell and Jagodzinski notations is unambiguous, e.g., 10H (hhccc) 2 , 11 10H (hhhcc) 2 , 12 and 10H (hcccc) 2 . 13 A key feature of these perovskite polytypes is the connectivity of the BX 6 units, which can be either cornersharing octahedra (CSO) formed in cubic close-packed stacking or face-sharing octahedra (FSO) generated by hexagonal close-packed stacking.…”

Section: ■ Introductionmentioning

confidence: 99%

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Enhanced Photoluminescence and Reduced Dimensionality via Vacancy Ordering in a 10H Halide Perovskite

et al. 2023

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Vacancy-ordered halide perovskites have received great interest in optoelectronic applications. In this work, we report the novel inorganic halide Cs 10 MnSb 6 Cl 30 with a distinctive 10H (10-layer hexagonal) perovskite polytype structure with (hcccc) 2 stacking. Cs 10 MnSb 6 Cl 30 has 30% B-site vacancies ordered at both corner-and face-sharing sites, resulting in [MnSb 6 Cl 30 ] 10− n columns, i.e., a reduction of octahedral connectivity to 1D. This results in enhanced photoluminescence in comparison to the previously reported 25% vacancy-ordered 3C polytype Cs 4 MnSb 2 Cl 12 with 2D connectivity. This demonstrates not only the existence of the 10H perovskite structure in halides but also demonstrates the degree of B-site deficiency and stacking sequence variation as a direction to tune the optical properties of perovskite polytypes via vacancy rearrangements.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Enhanced Photoluminescence and Reduced Dimensionality via Vacancy Ordering in a 10H Halide Perovskite

et al. 2023

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“…1). Illustrative examples are provided by Ba 4 LnMn 3 O 12 (Ln = Sc or Nb) χ data [5,6], for which the obtained C values are much too low to be compared with the expectation of S = 2 spins from Mn 3+ cations. If the obtained C values are not reliable, it also raises questions about the obtained θ CW parameters.…”

Section: Introductionmentioning

confidence: 99%

“…In this work, we propose to analyze the paramagnetic data of materials hosting magnetic clusters adopting Heisenberg-type Hamiltonians [2] parametrized by exchange constants J n , with the intercluster interactions taken into account by a mean field approach. This is an alternative, semi-empirical approach which, while already tested in the case of spin dimers [12,13], is not particularly explored in the case of spin trimers [5,6].…”

Section: Introductionmentioning

confidence: 99%

A semi-empirical analysis of the paramagnetic susceptibility of solid state magnetic clusters

Braz¹,

Garcı́a²

2022

Preprint

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Recent developments in the synthesis of new magnetic materials lead to the discovery of new quantum paramagnets. Many of these materials, such as the perovskites Ba4LnMn4O12 (Ln = Sc or Nb), Ba3Mn2O8, and Sr3Cr2O8 present isolated magnetic clusters with strong intracluster interactions but weak intercluster interactions, which delays the onset of order to lower temperatures (T ). This offset between the local energy scale and the magnetic ordering temperature is the hallmark of magnetic frustration. At sufficient high-T , the paramagnetic susceptibility (χ) of frustrated cluster magnets can be fit to a Curie-Weiss law, but the derived microscopic parameters cannot in general be reconciled with those obtained from other methods. In this work, we present an analytical microscopic theory to obtain χ of dimer and trimer cluster magnets, the two most commonly found in literature, making use of suitable Heisenberg-type Hamiltonians. We also add intercluster interactions in a mean-field level, thus obtaining an expression to the critical temperature of the system and defining a new effective frustration parameter f eff . Our method is exemplified by treating the χ data of some selected materials.

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The point defect and electronic structure of K doped LaCo0.9Fe0.1O3 perovskite with enhanced microwave absorbing ability

et al. 2021

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New 10H perovskites Ba₅Ln_1−xMn_4+yO_15−δ with spin glass behaviour

Abstract: New 10H perovskites Ba5Ln1−xMn4+yO15−δ with ordered arrangements of Ln and Mn ions and spin glass behavior were synthesized and investigated.

Cited by 7 publications

References 31 publications

Enhanced Photoluminescence and Reduced Dimensionality via Vacancy Ordering in a 10H Halide Perovskite

Enhanced Photoluminescence and Reduced Dimensionality via Vacancy Ordering in a 10H Halide Perovskite

A semi-empirical analysis of the paramagnetic susceptibility of solid state magnetic clusters

The point defect and electronic structure of K doped LaCo0.9Fe0.1O3 perovskite with enhanced microwave absorbing ability

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