Zn{sub 1−x}Co{sub x}WO{sub 4} (0 ≤ x ≤ 1) full range solid solution: Structure, optical properties, and magnetism
- China National Tobacco Quality Supervision & Test Center, No.2 Fengyang Street, Zhengzhou High & New Technology Industries Development Zone, Zhengzhou 450001 (China)
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083 (China)
Graphical abstract: The continuous modulation on crystal structure and band gap is achieved in the Zn{sub 1−x}Co{sub x}WO{sub 4} (0 ≤ x ≤ 1) full range solid solution. - Highlights: • Zn{sub 1−x}Co{sub x}WO{sub 4} (0 ≤ x ≤ 1) solid solution was synthesized by a hydrothermal method. • They all present a single-phase in the wolframite structure with space group P2/c. • The continuous tenability in band gap was achieved in Zn{sub 1−x}Co{sub x}WO{sub 4} (0 ≤ x ≤ 1). • CoWO{sub 4} and Zn{sub 0.5}Co{sub 0.5}WO{sub 4} are antiferromagnetic and paramagnetic, respectively. - Abstract: A novel full-range solid-solution Zn{sub 1−x}Co{sub x}WO{sub 4} (0 ≤ x ≤ 1) was successfully developed via a facile one-pot hydrothermal route. The phase structure and microstructure were characterized by X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectra and scanning electron microscopy (SEM). The Zn{sub 1−x}Co{sub x}WO{sub 4} solid solution possesses similar wolframite crystal structure with the same space group P2/c. Diffuse reflection spectroscopy (DRS) measurements on Zn{sub 1−x}Co{sub x}WO{sub 4} (0 ≤ x ≤ 1) demonstrated that the optical band gap can be continuously tuned from 3.56 eV to 2.61 eV for direct transition and 1.87 eV for indirect transition, respectively, with increasing x from 0 to 1. Magnetic susceptibility measurements reveal that CoWO{sub 4} has an antiferromagnetic transition at T{sub N} = 42 K, whereas Zn{sub 0.5}Co{sub 0.5}WO{sub 4} exhibits paramagnetic behavior. Moreover, CoWO{sub 4} and Zn{sub 0.5}Co{sub 0.5}WO{sub 4} obey the Curie–Weiss law from 200 k down to 50 K, and their effective magnetic moments were determined.
- OSTI ID:
- 22581446
- Journal Information:
- Materials Research Bulletin, Vol. 74; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANTIFERROMAGNETISM
COBALT TUNGSTATES
CURIE-WEISS LAW
FOURIER TRANSFORMATION
HYDROTHERMAL SYNTHESIS
INFRARED SPECTRA
MAGNETIC SUSCEPTIBILITY
MICROSTRUCTURE
MONOCLINIC LATTICES
OPTICAL PROPERTIES
PARAMAGNETISM
SCANNING ELECTRON MICROSCOPY
SEMICONDUCTOR MATERIALS
SOLID SOLUTIONS
WOLFRAMITE
X-RAY DIFFRACTION
ZINC COMPOUNDS