Study of diluted magnetic semiconductor: Co-doped ZnO

Zn1-xCoxO diluted magnetic semiconductor was prepared by hydrothermal method at 200 °C and 240 °C for 24h with the Co2+ doping content of 5~15 mol%. NaOH was used as the mineralizer. X-ray diffraction analysis indicated that the as-prepared Co-doped ZnO had the pure ZnO wurtzite structure. UV–Visible spectroscopy had shown that the Co ions are substituted to Zn ions in ZnO matrix. Room temperature VSM revealed a paramagnetic behavior of the Co-doped ZnO samples. FE-SEM analyses showed that nanocrystalline powders of pure Zn095Co0.05O and Zn09Co0.1O could be prepared by the hydrothermal method.

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Structural, morphological, optical and magnetic properties of RF sputtered Co doped ZnO diluted magnetic semiconductor for spintronic applications

Applied Physics A ◽

10.1007/s00339-019-2886-0 ◽

2019 ◽

Vol 125 (9) ◽

Cited By ~ 5

Author(s):

R. Siddheswaran ◽

Rostislav Medlín ◽

C. Esther Jeyanthi ◽

S. Gokul Raj ◽

R. V. Mangalaraja

Keyword(s):

Magnetic Properties ◽

Diluted Magnetic Semiconductor ◽

Magnetic Semiconductor ◽

Optical And Magnetic Properties ◽

Doped Zno ◽

Diluted Magnetic ◽

Co Doped

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An Oxide-Diluted Magnetic Semiconductor: Co-Doped ZnO

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.652-654.585 ◽

2013 ◽

Vol 652-654 ◽

pp. 585-589 ◽

Cited By ~ 2

Author(s):

Tong Li ◽

Qiong Jie ◽

Yu Zhang ◽

Ya Xin Wang ◽

Xiao Chang Ni

Keyword(s):

Diluted Magnetic Semiconductors ◽

Magnetic Semiconductors ◽

Diluted Magnetic Semiconductor ◽

Experimental Studies ◽

Magnetic Semiconductor ◽

Wide Band ◽

Wide Band Gap ◽

Doped Zno ◽

Diluted Magnetic ◽

Co Doped

The discovery of ferromagnetism (FM) in wide band-gap semiconductors doped with transition metals (TM), known as diluted magnetic semiconductors (DMSs), has attracted much interest. These materials are applicable to spin-based optoelectronic devices working at room temperature (RT). Among DMSs, the system of Co-doped ZnO is considered as the most promising candidate, which was expected to robust magnetism. This paper focuses primarily on the recent progress in the experimental studies of ZnO:Co DMSs. The magnetic properties and possible mechanism of ZnO:Co DMSs prepared by different methods are summarized and reviewed.

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Preparation and Characterization of Cobalt Doped ZnO and TiO2

MRS Proceedings ◽

10.1557/proc-722-k9.14 ◽

2002 ◽

Vol 722 ◽

Author(s):

Shaoguang Yang ◽

Silas T. Hung ◽

Herman H.Y. Sung ◽

A.B. Pakhomov ◽

C.Y. Wong

Keyword(s):

Diluted Magnetic Semiconductor ◽

Magnetic Semiconductor ◽

Zno Films ◽

X Ray Diffraction ◽

Sputtering Deposition ◽

X Ray ◽

Doped Zno ◽

Diluted Magnetic ◽

Co Doped

AbstractSynthesis and characterization of transparent Co-doped ZnO and TiO2 diluted magnetic semiconductor (DMS) films are described. The films are prepared by single sputtering deposition. They are ferromagnetic at temperatures as high as 350 K. The films were characterized by X-ray diffraction (XRD), X-ray photoemission spectroscopy (XPS), X-ray fluorescence (XRF). Optical transparency was measured on UV/VIS spectrometer. The Codoped ZnO films had wurtzite structure similar to ZnO with the (002) preferential texture. Neither XRD nor XPS showed any presence of pure Co or CoO in the samples. The Co-doped TiO2 samples were amorphous, and some unoxidized Co was found in the films.

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