Time-of-flight neutron diffraction study of the structure of the perovskite-type oxynitride LaWO0.6N2.4

Bacher, P.; Antoine, P.; Marchand, R.; L'Haridon, P.; Laurent, Y.; Roult, G.

doi:10.1016/0022-4596(88)90091-6

Cited by 64 publications

(36 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A very limited number of nitride perovskites and Sb-containing nitrides have been reported. There are few existing experimental reports on oxygen-containing LaWN3 [16] [17] and TaThN3 [18] perovskites synthesized in bulk form, and a few recent theoretical papers on these and related materials [19] [20]. Several other nitride perovskites have been theoretically predicted [21] [22], and LaWN3 was synthesized in the thin film form by our group [23].…”

Section: Introductionmentioning

confidence: 99%

Thin Film Synthesis of Semiconductors in the Mg–Sb–N Materials System

et al. 2019

View full text Add to dashboard Cite

Nitrides feature many interesting properties, such as a wide range of bandgaps suitable for optoelectronic devices including light-emitting diodes (LEDs), and piezoelectric response used in microelectromechanical systems (MEMS). Nitrides are also significantly underexplored compared to oxides and other chemistries, with many being thermochemically metastable, sparking interest from a basic science point of view. This paper reports on experimental and computational exploration of the Mg-Sb-N material system, featuring both metastable materials and interesting semiconducting properties. Using sputter deposition, we discovered a new Mg2SbN3 nitride with a wurtzite-derived crystal structure and synthesized the antimonide-nitride Mg3SbN with an antiperovskite crystal structure for the first time in thin film form. Theoretical calculations indicate that Mg2SbN3 is metastable and has properties relevant to LEDs and MEMS, whereas Mg3SbN has a large dielectric constant (28e0) and low hole effective masses (0.9m0), of interest for photovoltaic solar cell absorbers. The experimental solar-matched 1.3 eV optical absorption onset of the Mg3SbN antiperovskite agrees with the theoretical prediction (1.3 eV direct, 1.1 eV indirect), and with the measurements of room-temperature near-bandgap photoluminescence. These results make an important contribution towards understanding semiconductor properties and chemical trends in the Mg-Sb-N materials system, paving the way to future practical applications of these novel materials.

show abstract

Section: Introductionmentioning

confidence: 99%

Thin Film Synthesis of Semiconductors in the Mg–Sb–N Materials System

et al. 2019

View full text Add to dashboard Cite

show abstract

“…In fact, these materials are being extensively studied due their interesting optical, photocatalytic, dielectric, and magnetoresistive properties [17]. The O/N ratio in these structures, which allows to tune their electronic properties, can be as low as 0.25% as in LaWO 0.6 N 2.4 [17][18][19]. However, the synthesis of pure nitride perovskites resulted to be a very challenging task, and only one compound (TaThN 3 [20]) has been reported up to now.…”

Section: Introductionmentioning

confidence: 99%

Rare-earth magnetic nitride perovskites

et al. 2019

View full text Add to dashboard Cite

We propose perovskite nitrides with magnetic rare-earth metals as novel materials with a range of technological applications. These materials appear to be thermodynamically stable and, in spite of possessing different crystal structures and different atomic environments, they retain the magnetic moment of the corresponding elemental rare-earth metal. We find both magnetic metals and semiconductors, with a wide range of magnetic moments and some systems posses record high magnetic anisotropy energies. Further tuning of the electronic and magnetic properties can also be expected by doping with other rare-earths or by creating solid solutions. The synthesis of these exotic materials with unusual compositions would not only extend the accepted stability domain of perovskites, but also open the way for a series of applications enabled by their rich physics.

show abstract

“…When Na 2 WO 4 • 2H 2 0 (which loses 2H20 at 100 0 C in air) was heated in an ammonia flow to temperatures less than -650 'C for 12 h, only a small fraction of the new phase was seen in the X-ray powder diffraction pattern of the resulting product; the two major polycrystalline phases observed in the pattern were unreacted Na2WO 4 and W 2 N. When Na 2 WO 4 • 2H 2 0 was heated (Na2WO4 melts at 696 *C) in air and then exposed to a flow of ammonia gas, a reaction was observed to occur after about ten minutes. The reaction melt began bubbling with the formation of a small amount of black solid.…”

Section: Synthesismentioning

confidence: 99%