Intrinsic ferromagnetic properties in Cr-doped ZnO diluted magnetic semiconductors

Journal Article · Sun May 15 00:00:00 EDT 2011 · Journal of Solid State Chemistry

OSTI ID:21494298

Yang, Liu ^[1]; Yanting, Yang ^[1]; Huilian, Liu; Lili, Yang; Yongjun, Zhang; Yaxin, Wang; Maobin, Wei; Xiaoyan, Liu; Lianhua, Fei; Xin, Cheng ^[1]

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1. Institute of Condensed State Physics, Jilin Normal University, Siping 136000 (China)

The Cr-doped zinc oxide (Zn{sub 1-x}Cr{sub x}O, 0{<=}x{<=}0.08) diluted magnetic semiconductors have been synthesized successfully by the sol-gel method. Investigations on magnetic, optical and structural properties of the produced samples have been done. Energy dispersive spectroscopy (EDS) shows the existence of Cr ion in the Cr-doped ZnO. The results of X-ray diffraction (XRD), the transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) indicate that the Cr ions are at least partially substitutionally incorporated into the crystal lattice of ZnO. The produced samples show good high-T{sub c} (Curie temperature) ferromagnetism (FM) in Cr-doped ZnO nanoparticles with Cr concentration of less than 5 at%. The results of photoluminescence (PL) further testify that FM is an intrinsic property of the Cr-doped ZnO nanoparticles. And the occurrence of FM should mainly contribute to the Cr doping. -- Graphical Abstract: As can be seen from the magnetic hysteresis loops of Zn{sub 1-x}Cr{sub x}O (x=0.01, 0.03, 0.05, and 0.08) at room temperature under 10 KOe, the samples show good high-T{sub c} ferromagnetism with Cr concentration of less than 5 at%. Display Omitted Highlights: {yields} Zn{sub 1-x}Cr{sub x}O(0{<=}x{<=}0.08) nanoparticles are successfully synthesized by sol-gel method. {yields} The Cr ions are substitutionally incorporated into the crystal lattice of ZnO. {yields} The Cr-doped ZnO nanoparticles show good high-T{sub c} ferromagnetism. {yields} The ferromagnetism is an intrinsic property of the Cr-doped ZnO nanoparticles.

• OSTI ID: 21494298
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 5; Other Information: DOI: 10.1016/j.jssc.2011.03.049; PII: S0022-4596(11)00160-5; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION
ABSORPTION SPECTROSCOPY
CHROMIUM IONS
CRYSTAL LATTICES
CURIE POINT
DOPED MATERIALS
FERROMAGNETISM
FINE STRUCTURE
HYSTERESIS
MAGNETIC PROPERTIES
MAGNETIC SEMICONDUCTORS
NANOSTRUCTURES
PHOTOLUMINESCENCE
SOL-GEL PROCESS
TEMPERATURE RANGE 0273-0400 K
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY
X-RAY SPECTROSCOPY
ZINC OXIDES
CHALCOGENIDES
CHARGED PARTICLES
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
ELECTRON MICROSCOPY
ELECTRON SPECTROSCOPY
EMISSION
IONS
LUMINESCENCE
MAGNETISM
MATERIALS
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PHOTON EMISSION
PHYSICAL PROPERTIES
SCATTERING
SEMICONDUCTOR MATERIALS
SORPTION
SPECTROSCOPY
TEMPERATURE RANGE
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
ZINC COMPOUNDS