Magnetic Properties of the Dilute Magnetic Semiconductor Zn{sub 1-x}Co{sub x}O Nanoparticles

Journal Article · Fri Nov 15 04:00:00 EST 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-019-5135-Z· OSTI ID:22919477

Robkhob, Prissana ^[1]; Tang, I. Ming ^[2]; Thongmee, Sirikanjana ^[1]

---

1. Kesartsart University, Department of Physics, Faculty of Science (Thailand)
2. King Mongkut’s University of Technology Thonburi, Department of Mathematics, Faculty of Science (Thailand)

The magnetic properties of the dilute magnetic semiconductor (DMS) are due the existence of two competing interactions, a direct ferromagnetic interaction and an indirect antiferromagnetic interaction. This is well established in the Zn{sub 1-x}Mn{sub x}O DMS, but is controversy in the Zn{sub 1-x}Co{sub x}O DMS. To gain insights, a series of Co-substituted ZnO NRs (x = 0, 0.01, 0.02, 0.03, 0.04, and 0.05) have been fabricated using a low-temperature hydrothermal method. The magnetization of these Co-doped ZnO NPs was measured with a vibrating sample magneto-meter. Expressing the magnetization results in units of Bohr magnetons per Co ions, it is found that the ferromagnetic contributions become more dominant as more magnetic Co ions are doped into the ZnO NPs. X-ray diffraction, energy dispersive X-ray, scanning electron microscopy, and photoluminescence measurements were done to characterize the Co:ZnO NPs.

• OSTI ID: 22919477
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 11 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ANTIFERROMAGNETISM
COBALT ADDITIONS
DOPED MATERIALS
HYDROTHERMAL SYNTHESIS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETIC SEMICONDUCTORS
MAGNETIZATION
NANOPARTICLES
NANOSTRUCTURES
PHOTOLUMINESCENCE
SCANNING ELECTRON MICROSCOPY
X-RAY DIFFRACTION
ZINC OXIDES