A unified description of the double perovskite family Sr2MWO6 within a rigid ion model

2016 ◽  
Vol 18 (37) ◽  
pp. 26033-26039 ◽  
Author(s):  
Urko Petralanda ◽  
I. Etxebarria
Keyword(s):  
Phase Transitions ◽  
Double Perovskite ◽  
Double Perovskites ◽  
Structural Instabilities ◽  
Unified Description ◽  
Rigid Ion Model

The sequence of phase transitions and structural instabilities of the Sr2MWO6 double perovskites are investigated using a rigid ion model.

Electron Doping Effect on Structural and Magnetic Phase Transitions in Sr2-xNdxFeMoO6 Double Perovskites.

ChemInform ◽  
2006 ◽  
Vol 37 (32) ◽  
Author(s):  
A. K. Azad ◽  
S.-G. Eriksson ◽  
Abdullah Khan ◽  
A. Eriksson ◽  
M. Tseggai
Keyword(s):  
Phase Transitions ◽  
Magnetic Phase ◽  
Magnetic Phase Transitions ◽  
Doping Effect ◽  
Double Perovskites ◽  
Electron Doping

scholarly journals Exploiting Microstructural Instabilities in Solids and Structures: From Metamaterials to Structural Transitions

2017 ◽  
Vol 69 (5) ◽  
Author(s):  
Dennis M. Kochmann ◽  
Katia Bertoldi
Keyword(s):  
Phase Transitions ◽  
Paradigm Shift ◽  
Domain Switching ◽  
Structural Level ◽  
The Past ◽  
Potential Energy Landscape ◽  
Mechanical Metamaterials ◽  
Engineering Mechanics ◽  
Structural Instabilities ◽  
Ferroelectric Switching

Instabilities in solids and structures are ubiquitous across all length and time scales, and engineering design principles have commonly aimed at preventing instability. However, over the past two decades, engineering mechanics has undergone a paradigm shift, away from avoiding instability and toward taking advantage thereof. At the core of all instabilities—both at the microstructural scale in materials and at the macroscopic, structural level—lies a nonconvex potential energy landscape which is responsible, e.g., for phase transitions and domain switching, localization, pattern formation, or structural buckling and snapping. Deliberately driving a system close to, into, and beyond the unstable regime has been exploited to create new materials systems with superior, interesting, or extreme physical properties. Here, we review the state-of-the-art in utilizing mechanical instabilities in solids and structures at the microstructural level in order to control macroscopic (meta)material performance. After a brief theoretical review, we discuss examples of utilizing material instabilities (from phase transitions and ferroelectric switching to extreme composites) as well as examples of exploiting structural instabilities in acoustic and mechanical metamaterials.

Cs2AgBiBr6−xClx solid solutions – band gap engineering with halide double perovskites

2019 ◽  
Vol 7 (31) ◽  
pp. 9686-9689 ◽  
Author(s):  
Matthew B. Gray ◽  
Eric T. McClure ◽  
Patrick M. Woodward
Keyword(s):  
Solid Solution ◽  
Band Gap ◽  
Solid Solutions ◽  
Double Perovskite ◽  
Double Perovskites ◽  
Band Gap Engineering ◽  
Vegard’S Law ◽  
Upward Deviation

The halide double perovskite solid solution Cs2AgBiBr6−xClx has been investigated and found to exhibit a band gap that increases from 2.2 eV to 2.8 eV as the Cl− content increases, with an upward deviation from Vegard's law when x > 5.

Characterization of Antiferromagnetism in Double Perovskites Ba2FeMoO6 Prepared by Solid State Method

2019 ◽  
Vol 891 ◽  
pp. 224-229
Author(s):  
Naphat Albutt ◽  
Vanussanun Aitviriyaphan ◽  
Thanapong Sareein ◽  
Sudarath Suntaropas ◽  
Panakamon Thonglor ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Solid State ◽  
Solid State Reaction ◽  
Double Perovskite ◽  
Solid State Reaction Method ◽  
Double Perovskites ◽  
Solid State Method ◽  
Reaction Method ◽  
State Method

The magnetic properties of Ba2FeMoO6 (BFMO) double perovskite are investigated. BFMO samples were prepared by solid state reaction method through compression. Magnetic properties are influenced by electron environments of the Fe3+ and Mo5+ ions within the perovskite structure. BFMO sintered at 800 oC exhibited the largest hysteresis loop at 50 K. In addition, the values of Ms and Mr indicate ferromagnetic behaviour in BFMO ceramics sintered at 800 oC for different times up to 10 hours. Using the Curie-Weiss law fitting to investigate μeff~30μB high spin of Fe and Mo, and negative θ present the antiferromagnetic characteristics of the BFMO sample.

Synthesis and luminescence of Mn-doped Cs2AgInCl6 double perovskites

2018 ◽  
Vol 54 (41) ◽  
pp. 5205-5208 ◽  
Author(s):  
Nila Nandha K. ◽  
Angshuman Nag
Keyword(s):  
Visible Region ◽  
Double Perovskite ◽  
Wide Bandgap ◽  
Double Perovskites ◽  
Mn Doped

Mn2+ has been doped in a wide bandgap Cs2AgInCl6 double perovskite to emit light in the visible region.

scholarly journals Deposition routes of Cs2AgBiBr6 double perovskites for photovoltaic applications

MRS Advances ◽  
2018 ◽  
Vol 3 (32) ◽  
pp. 1819-1823 ◽  
Author(s):  
Martina Pantaler ◽  
Christian Fettkenhauer ◽  
Hoang L. Nguyen ◽  
Irina Anusca ◽  
Doru C. Lupascu
Keyword(s):  
Thin Films ◽  
Spin Coating ◽  
Perovskite Phase ◽  
Perovskite Solar Cells ◽  
Double Perovskite ◽  
Double Perovskites ◽  
Sequential Deposition ◽  
Absorber Material ◽  
Photovoltaic Applications ◽  
Deposition Processes

ABSTRACTThe lead free double perovskite Cs2AgBiBr6 is an upcoming alternative to lead based perovskites as absorber material in perovskite solar cells. So far, the majority of investigations on this interesting material have focused on polycrystalline powders and single crystals. We present vapor and solution based approaches for the preparation of Cs2AgBiBr6 thin films. Sequential vapor deposition processes starting from different precursors are shown and their weaknesses are discussed. Single source evaporation of Cs2AgBiBr6 and sequential deposition of Cs3Bi2Br9 and AgBr result in the formation of the double perovskite phase. Additionally, we show the possibility of the preparation of planar Cs2AgBiBr6 thin films by spin coating.

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