Realization of a Half Metal with a Record‐High Curie Temperature in Perovskite Oxides (Adv. Mater. 17/2022)

Liu, Zhehong; Zhang, Shuaikang; Wang, Xiao; Ye, Xubin; Qin, Shaojin; Shen, Xudong; Lu, Daoqiang; Dai, Jingying; Cao, Yingying; Chen, Kai; Radu, F.; Wu, Wen‐Bin; Chen, Chien‐Te; Francoual, S.; Mardegan, J. R. L.; Leupold, O.; Tjeng, Liu Hao; Hu, Zhiwei; Yang, Y.; Long, Youwen

doi:10.1002/adma.202270129

Cited by 2 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The above electronic structures of the spin up and spin down near the Fermi level illustrate a magnetic half‐metallic nature for Cs 2 NaHoCl 6 . [ 12 ] Further, we measured the temperature‐dependent magnetic susceptibility ( χ ) of Cs 2 NaHoCl 6 (Figure 2c), where the susceptibility experiences a sharp decrease at high temperature, similar to the reported perovskite‐type half metal of LaCu 3 Fe 2 Re 2 O 12 . [ 12 ] The absorption spectra of pristine and Bi 3+ ‐doped Cs 2 NaHoCl 6 were collected in Figure 2d.…”

Section: Resultssupporting

confidence: 76%

“…[ 12 ] Further, we measured the temperature‐dependent magnetic susceptibility ( χ ) of Cs 2 NaHoCl 6 (Figure 2c), where the susceptibility experiences a sharp decrease at high temperature, similar to the reported perovskite‐type half metal of LaCu 3 Fe 2 Re 2 O 12 . [ 12 ] The absorption spectra of pristine and Bi 3+ ‐doped Cs 2 NaHoCl 6 were collected in Figure 2d. For pristine Cs 2 NaHoCl 6 , the absorption peaks at 321, 362, and 402 nm are frequently observed in other lead‐free double perovskites, which could be attributed to the absorption of host or STEs.…”

Section: Resultssupporting

confidence: 75%

See 1 more Smart Citation

Constructing Efficient and Thermostable Red‐NIR Emitter via Cross Relaxation and Crystal‐Field Engineering of Holmium‐Based Perovskite‐Type Half Metal

Sun,

Jia,

Chen

et al. 2023

Laser & Photonics Reviews

View full text Add to dashboard Cite

Lanthanide ions, as dopants, have evoked widespread research interest owing to the rich optical, magnetic, and electrical properties, but their luminescent intensity is always limited by typical concentration quenching. Herein, a holmium‐based double perovskite of Cs2NaHoCl6 is reported, which surprisingly breaks through this barrier and achieves efficient red‐NIR emission by virtue of the large unit cell, low phonon energy, high content of activators, and cross relaxation phenomenon between Ho3+. The heavy Ho3+ also endows the intriguing half‐metallic nature with a down‐spin conducting band and an up‐spin insulating band. After performing ion doping on crystallographic sites of Na+ and Ho3+, the photoluminescence quantum yield of such red‐NIR emitter under 450 nm excitation is dramatically promoted to 82.3%, benefiting from the improved crystal field environment that alleviates the parity forbidden rule and suppresses non‐radiative recombination loss. Furthermore, the heat‐favorable phonon‐assisted population processes enable the robust photostability against thermal quenching. By combining a 450 nm chip, the red‐NIR light‐emitting diodes are fabricated, in which the wide‐coverage NIR emissions are ideally suited for medical light source, night vision, nondestructive examination, and transmission imaging. It is believed that this work will open an avenue for enhancing the fluorescence of lanthanide ions and developing advanced spintronic materials.

show abstract

Section: Resultssupporting

confidence: 76%

Section: Resultssupporting

confidence: 75%

Constructing Efficient and Thermostable Red‐NIR Emitter via Cross Relaxation and Crystal‐Field Engineering of Holmium‐Based Perovskite‐Type Half Metal

Sun,

Jia,

Chen

et al. 2023

Laser & Photonics Reviews

View full text Add to dashboard Cite

show abstract

“…The half‐metallic feature of Ni 6 /Al 24 O 36 is clearly seen from the band structures, [ 62,63 ] where only the Ni 3d bands cross the Fermi energy. Specifically, the spin‐down channel is conducting, whereas the spin‐up channel has an energy gap of about 0.3 eV ( Figure 2 a).…”

Section: Resultsmentioning

confidence: 99%

“…The field dependence of MR shows a butterfly‐shaped feature (Figure 2e and Figure S6, Supporting Information), suggesting the spin‐dependent tunneling of spin‐polarized conduction electrons through grain boundaries. [ 62,63 ] The result indicates that the strong interaction between Ni monolayer clusters and Al 2 O 3 alters the band structures of Ni monolayer clusters and makes them possess unique half‐metal features.…”

Section: Resultsmentioning

confidence: 99%

Extraordinary Catalytic Performance of Nickel Half‐Metal Clusters for Light‐Driven Dry Reforming of Methane

et al. 2023

Advanced Energy Materials

View full text Add to dashboard Cite

Global warming and the energy shortage due to the burning of fossil fuels are two major challenges. A strategy of light-driven catalytic dry reforming of methane (DRM) using inexhaustible solar energy has provided an effective approach to tackle these challenges. Loaded metallic Ni nanoparticles have been identified as promising catalysts as alternatives to noble metals for DRM. However, they suffer from quick deactivation caused by severe coking due to thermodynamically inevitable side-reactions. Herein, a unique nickel half-metal catalyst of monolayer nickel clusters stabilized by alumina is reported, with 100% atomic utilization efficiency and extraordinary catalytic performance for light-driven DRM, dramatically different from its counterpart of conventional metallic Ni nanoparticles. It has extremely high specific H 2 and CO production rates of 8572.96 and 9614.26 mmol min −1 gNi −1 , more than one order of magnitude higher than those of Ni nanoparticles. No detectable coke is formed due to the alteration of kinetic processes for DRM, resulting in the inhibition of coke deposition. It is discovered that light not only significantly enhances catalytic activity, but also enables quick thermocatalytic deactivation to be durable due to the oxidation of carbon species and the desorption of strongly adsorbed CO 2 and CO being dramatically promoted by light.

show abstract

Realization of a Half Metal with a Record‐High Curie Temperature in Perovskite Oxides (Adv. Mater. 17/2022)

Cited by 2 publications

References 0 publications

Constructing Efficient and Thermostable Red‐NIR Emitter via Cross Relaxation and Crystal‐Field Engineering of Holmium‐Based Perovskite‐Type Half Metal

Constructing Efficient and Thermostable Red‐NIR Emitter via Cross Relaxation and Crystal‐Field Engineering of Holmium‐Based Perovskite‐Type Half Metal

Extraordinary Catalytic Performance of Nickel Half‐Metal Clusters for Light‐Driven Dry Reforming of Methane

Contact Info

Product

Resources

About