skip to main content

Title: Low-temperature ferromagnetic properties in Co-doped Ag{sub 2}Se nanoparticles

β-Ag{sub 2}Se is a topologically nontrivial insulator. The magnetic properties of Co-doped Ag{sub 2}Se 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 Co{sup 2+} ions mainly substituting Ag{sub I} sites in the Ag{sub 2}Se structure, the resistivity, Curie temperature T{sub c}, and magnetization increased. At 10 T, a sharp drop of resistance near T{sub c} was detected due to Co dopants. The ferromagnetic behavior in Co-doped Ag{sub 2}Se might result from the intra-layer ferromagnetic coupling and surface spin. This magnetic semiconductor is a promising candidate in electronics and spintronics.
Authors:
; ; ; ;  [1] ;  [2]
  1. School of Physics, Huazhong University of Science and Technology, Wuhan 430074 (China)
  2. Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074 (China)
Publication Date:
OSTI Identifier:
22257160
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COBALT IONS; CURIE POINT; DOPED MATERIALS; FERROMAGNETIC MATERIALS; MAGNETIC PROPERTIES; MAGNETIC SEMICONDUCTORS; NANOSTRUCTURES; PARTICLES; SILVER SELENIDES