Defect-engineered room-temperature ferromagnetism in quasi-two-dimensional nitrided CoTa2O6

被引：3

作者：

Ma, Yalin ^{[1
]}

Zhao, Shuang ^{[1
]}

Zhou, Xiao ^{[1
]}

Zeng, Yijie ^{[2
,3
]}

Song, Haili ^{[1
]}

Wang, Jing ^{[1
]}

Li, Guangqin ^{[1
]}

Frank, Corey E. ^{[4
]}

Ma, Lu ^{[5
]}

Croft, Mark ^{[6
]}

Wang, Yonggang ^{[7
]}

Greenblatt, Martha ^{[4
]}

Yao, Dao-Xin ^{[2
]}

Li, Man-Rong ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Chem, Minist Educ, Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Peoples R China

[2] Sun Yat Sen Univ, Sch Phys, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Peoples R China

[3] Hangzhou Dianzi Univ, Coll Sci, Hangzhou 310018, Peoples R China

[4] Rutgers State Univ, Dept Chem & Chem Biol, 123 Bevier Rd, Piscataway, NJ 08854 USA

[5] Brookhaven Natl Lab, Natl Synchrotron Light Source II, Bldg 74,POB 5000, Upton, NY 11973 USA

[6] Rutgers State Univ, Dept Phys & Astron, 136 Frelinghuysen Rd, Piscataway, NJ 08854 USA

[7] Ctr High Pressure Sci & Technol Adv Res HPSTAR, Beijing 100094, Peoples R China

来源：

PHYSICAL REVIEW B | 2021年 / 104卷 / 01期

基金：

美国国家科学基金会;

关键词：

DOUBLE PEROVSKITE; OXIDE; SEMICONDUCTORS; CONDUCTIVITY; OXYNITRIDES; MAGNETISM; CRYSTAL; DENSITY; TA3N5; TAON;

D O I：

10.1103/PhysRevB.104.014421

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thermal ammonolysis of quasi-two-dimensional (quasi-2D) CoTa2O6 yields the O2-/N3- and anionic vacancy-ordered Co2+Ta25+O6-xN2x/3 square(x/3) (x <= 0.15), which exhibits a transition from antiferromagnetism to defect-engineered above-room-temperature ferromagnetism. First-principles calculations reveal that the origin of ferromagnetism is a particular CoO5N configuration with N located at Wyckoff position 8 j, which breaks mirror symmetry about the ab plane. A pressure-induced electronic phase transition is also predicted at similar to 24.5 GPa, accompanied by insulator-to-metal transition and magnetic moment vanishing.

引用

页数：9

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