Journal ArticleDOI
Oxygen vacancy controlled tunable magnetic and electrical transport properties of (Li, Ni)-codoped ZnO thin films
TLDR
In this article, the electrical, magnetic, and magnetotransport properties of Li-Ni codoped ZnO thin films in the electron dominated, hole dominated, and insulating regimes were investigated.Abstract:
We investigated the electrical, magnetic, and magnetotransport properties of Li–Ni codoped ZnO thin films in the electron dominated, hole dominated, and insulating regimes. In a narrow window of oxygen growth pressure, 10−3–10−2 mbar, the films exhibited p-type conductivity with a maximum hole concentration ∼8.2×1017 cm−3. Magnetoresistance exhibited by the films is attributed to scattering of charge carriers due to localized magnetic moments. Insulating films showed superparamagnetic behavior, whereas both n-type and p-type films showed room temperature ferromagnetism. Our findings suggest that oxygen vacancies and Ni ions in cation site are jointly responsible for ferromagnetism that is not dependent on the carrier type.read more
Citations
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p-Type ZnO materials: Theory, growth, properties and devices
TL;DR: In this paper, the authors discuss p-type ZnO materials: theory, growth, properties and devices, comprehensively, and summarize the growth techniques and properties of P-type materials.
RaoP-Type ZnO Materials: Theory, Growth, Properties, and Devices
TL;DR: In this article, the authors discuss p-type ZnO materials: theory, growth, properties and devices, comprehensively, and summarize the growth techniques for p- type ZnOs.
Journal ArticleDOI
Oxygen Vacancy Promoted Heterogeneous Fenton-like Degradation of Ofloxacin at pH 3.2-9.0 by Cu Substituted Magnetic Fe3O4@FeOOH Nanocomposite
TL;DR: The new formed oxygen vacancy from in situ Fe substitution by Cu rather than promoted Fe3+/Fe2+ cycle was responsible for the ultraefficiency of Cu doped Fe3O4@FeOOH at neutral and even alkaline pHs.
Journal ArticleDOI
Antimicrobial Mechanism Based on H2O2 Generation at Oxygen Vacancies in ZnO Crystals
TL;DR: The comparatively detections showed that the antimicrobial activity of ZnO was correlated with its production of H2O2, and the t-ZnO treated in H2, which possessed the most V(O) in its crystal, produced the most H2 O2 and displayed the best antimacterial activity.
Journal ArticleDOI
Room-Temperature Ferromagnetism of Flowerlike CuO Nanostructures
TL;DR: In this article, the results of X-ray diffraction and Raman and Xray photoelectron spectroscopies show that the samples annealed at 400, 600, and 800 °C have a typical monoclinic structure and are absent of impurity phases.
References
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First principles materials design for semiconductor spintronics
TL;DR: In this paper, materials design of new functional diluted magnetic semiconductors (DMSs) is presented based on first principles calculations, and the stability of the ferromagnetic state in ZnO-, ZnS-, Zns, ZnSe and ZnTe-based DMSs is investigated systematically.
Journal ArticleDOI
High throughput fabrication of transition-metal-doped epitaxial ZnO thin films: A series of oxide-diluted magnetic semiconductors and their properties
Zhengwu Jin,Tomoteru Fukumura,Megumi Kawasaki,K. Ando,Hidekazu Saito,Takashi Sekiguchi,Y.-Z. Yoo,Makoto Murakami,Yuji Matsumoto,T. Hasegawa,Hideomi Koinuma +10 more
TL;DR: Combinatorial laser molecular-beam epitaxy method was employed to fabricate epitaxial ZnO thin films doped with all the 3d transition metal (TM) ions in a high throughput fashion as discussed by the authors.
Journal ArticleDOI
Defect-induced magnetic order in pure ZnO films
M. Khalid,Michael Ziese,Annette Setzer,Pablo Esquinazi,Michael Lorenz,Holger Hochmuth,Marius Grundmann,Daniel Spemann,Tilman Butz,G. Brauer,W. Anwand,G. Fischer,Waheed A. Adeagbo,Wolfram Hergert,Arthur Ernst +14 more
TL;DR: In this paper, the magnetic properties of pure ZnO thin films were investigated by pulsed-laser deposition on a variety of substrates and they showed reproducible ferromagnetism at 300 K when grown at $300--400\text{ }\ifmmode^\circ\else\textdegree\fi{}\text{C}$ and 0.1--1.0 mbar
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Correlated d 0 ferromagnetism and photoluminescence in undoped ZnO nanowires
Guozhong Xing,Dandan Wang,Jiabao Yi,Lili Yang,Ming Gao,Mi He,Jinghai Yang,Jun Ding,Tze Chien Sum,Tom Wu +9 more
TL;DR: In this article, the authors reported the correlated d(0) ferromagnetism and photoluminescence in undoped single-crystalline ZnO nanowires synthesized by using a vapor transport method.
Journal ArticleDOI
Ultralow-Threshold Laser Realized in Zinc Oxide
Hai Zhu,Chongxin Shan,Bin Yao,Binghui Li,Jiying Zhang,Z. Z. Zhang,D. X. Zhao,Dezhen Shen,Xiwu Fan,Youming Lu,Zikang Tang +10 more
TL;DR: In this paper, a MgO interlayer is used to confine electrons in the ZnO layer, while holes can pass through the Mg O layer and enter into the n-ZnO from the p-GaN layer.