Realization of a Half Metal with a Record-High Curie Temperature in Perovskite Oxides

Realization of a Half Metal with a Record-High Curie Temperature in Perovskite Oxides

© 2022 Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 34(2022), 17 vom: 01. Apr., Seite e2200626
1. Verfasser: Liu, Zhehong (VerfasserIn)
Weitere Verfasser: Zhang, Shuaikang, Wang, Xiao, Ye, Xubin, Qin, Shijun, Shen, Xudong, Lu, Dabiao, Dai, Jianhong, Cao, Yingying, Chen, Kai, Radu, Florin, Wu, Wen-Bin, Chen, Chien-Te, Francoual, Sonia, Mardegan, José R L, Leupold, Olaf, Tjeng, Liu Hao, Hu, Zhiwei, Yang, Yi-Feng, Long, Youwen
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article half metal high Curie temperature high-pressure synthesis quadruple perovskite oxide
Beschreibung
Zusammenfassung:© 2022 Wiley-VCH GmbH.
Half metals, in which one spin channel is conducting while the other is insulating with an energy gap, are theoretically considered to comprise 100% spin-polarized conducting electrons, and thus have promising applications in high-efficiency magnetic sensors, computer memory, magnetic recording, and so on. However, for practical applications, a high Curie temperature combined with a wide spin energy gap and large magnetization is required. Realizing such a high-performance combination is a key challenge. Herein, a novel A- and B-site ordered quadruple perovskite oxide LaCu3 Fe2 Re2 O12 with the charge format of Cu2+ /Fe3+ /Re4.5+ is reported. The strong Cu2+ (↑)Fe3+ (↑)Re4.5+ (↓) spin interactions lead to a ferrimagnetic Curie temperature as high as 710 K, which is the reported record in perovskite-type half metals thus far. The saturated magnetic moment determined at 300 K is 7.0 μB f.u.-1 and further increases to 8.0 μB f.u.-1 at 2 K. First-principles calculations reveal a half-metallic nature with a spin-down conducting band while a spin-up insulating band with a large energy gap up to 2.27 eV. The currently unprecedented realization of record Curie temperature coupling with the wide energy gap and large moment in LaCu3 Fe2 Re2 O12 opens a way for potential applications in advanced spintronic devices at/above room temperature
Beschreibung:Date Revised 27.04.2022
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202200626