Journal
CHEMICAL PHYSICS LETTERS
Volume 721, Issue -, Pages 57-61Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2019.02.031
Keywords
ZnO/CuO nanocomposites; Ferromagnetism; Hydrothermal method; Spintronic devices; Paramagnetism
Funding
- Natural Science Foundation of the Jiangsu Higher Education Institutions [16KJB430021, 17KJB430022]
- Open Project of Labs in Nanjing University of Information Science and Technology in 2017 [17KF015]
- Natural Science Foundation of Jiangsu Province [BK 20180784]
- Six Talent Peaks Project of Jiangsu Province [R2016L07]
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In this letter, the room-temperature ferromagnetic behavior in the ZnO/CuO nanocomposites has been reported. The composites composed of ZnO and CuO with different ratios were prepared by hydrothermal method. X-ray diffraction (XRD) and selected area electron diffraction (SAED) confirmed that these composites were made up by wurtzite ZnO and monoclinic CuO. X-ray photoelectron spectroscopy (XPS) indicated that Cu ions on the surface of the materials were in a divalent state. Magnetic measurements showed that all ZnO/CuO composites possessed room-temperature ferromagnetism, while pure ZnO was diamagnetic. With the increase of CuO content in the composites, ZnO/CuO composites displayed the coexistence of ferromagnetism and paramagnetism, and paramagnetism was gradually enhanced and dominated later.
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