Low-temperature ferromagnetic properties in Co-doped Ag2Se nanoparticles

被引：6

作者：

Yang, Fengxia ^{[1
]}

Yu, Gen ^{[1
]}

Xia, Zhengcai ^{[2
]}

Han, Chong ^{[1
]}

Liu, Tingting ^{[1
]}

Zhang, Duanming ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China

[2] Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 01期

关键词：

MAGNETIC TOPOLOGICAL INSULATOR; SILVER CHALCOGENIDES; TRANSPORT-PROPERTIES; ELECTRONIC-STRUCTURE; PHASE-TRANSITION; MAGNETORESISTANCE; NANOCRYSTALS; SURFACE; BI2TE3;

D O I：

10.1063/1.4855535

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

beta-Ag2Se is a topologically nontrivial insulator. The magnetic properties of Co-doped Ag2Se nanoparticles with Co concentrations up to 40% were investigated. The cusp of zero-field-cooling magnetization curves and the low-temperature hysteresis loops were observed. With increasing concentration of Co2+ ions mainly substituting Ag-I sites in the Ag2Se structure, the resistivity, Curie temperature T-c, and magnetization increased. At 10T, a sharp drop of resistance near T-c was detected due to Co dopants. The ferromagnetic behavior in Co-doped Ag2Se might result from the intra-layer ferromagnetic coupling and surface spin. This magnetic semiconductor is a promising candidate in electronics and spintronics. (C) 2014 AIP Publishing LLC.

引用

页数：5

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