Journal ArticleDOI
Magnetic and optical properties of Zn1– x Fe x O ( x = 0.05 and 0.10) diluted magnetic semiconducting nanoparticles
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In this paper, the magnetic and optical properties of chemically low temperature-synthesized Zn1-x Fe x O (x = 0.05 and 0.10) diluted magnetic semiconducting nanoparticles (∼7 nm) were investigated.Abstract:
We have investigated the magnetic and optical properties of chemically low temperature-synthesized Zn1– x Fe x O (x = 0.05 and 0.10) diluted magnetic semiconducting nanoparticles (∼7 nm). Observed magnetic behaviour of x = 0.05 samples showed that the net magnetic interaction was antiferromagnetic-like, a feature established by Curie–Weiss fit, concave Arrott–Belov–Kouvel (ABK) plots with the absence of spontaneous magnetization even at 5 K and stretched exponential-type time-dependent magnetization behaviour. Optimization of the Fe(x) dopant concentration in Zn1– x Fe x O gave the most favourable room-temperature ferromagnetism for x = 0.10, as supported by finite coercive field (∼94.4 Oe) and remanent magnetization (0.011 µB/Fe ion) from strong hysteretic magnetization vs. magnetic-field curves at room temperature. The Curie temperature of the x = 0.10 sample was estimated at ∼388 K. The existence of a room-temperature ferromagnetic phase was further established by the convex nature of the ABK plots wit...read more
Citations
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Journal ArticleDOI
Ferromagnetic behaviour of Fe-doped ZnO nanograined films.
Boris B. Straumal,Svetlana G. Protasova,Svetlana G. Protasova,Andrei A. Mazilkin,Andrei A. Mazilkin,Thomas Tietze,Eberhard Goering,Gisela Schütz,P. B. Straumal,Brigitte Baretzky +9 more
TL;DR: The influence of the grain boundary (GB) specific area sGB on the appearance of ferromagnetism in Fe-doped ZnO has been analysed and an empirical correlation has been found that the value of the specific grain boundary area s GB is the main factor controlling such behaviour.
Journal ArticleDOI
Increase of Fe solubility in ZnO induced by the grain boundary adsorption
Svetlana G. Protasova,Svetlana G. Protasova,Boris B. Straumal,Boris B. Straumal,Boris B. Straumal,Andrei A. Mazilkin,Andrei A. Mazilkin,S. V. Stakhanova,P. B. Straumal,P. B. Straumal,Brigitte Baretzky +10 more
TL;DR: In this article, the authors obtained the dependence of Fe solubility in ZnO on the grain size and showed that the thickness of a Fe-enriched layer in grain boundaries is that of several monolayers.
Journal ArticleDOI
Structural, optical, and multiferroic properties of single phased BiFeO 3
TL;DR: A soft chemical coprecipitation method has been proposed for synthesis of nano-sized multiferroic BiFeO3 (BFO) powders in this paper, where the X-ray diffraction pattern confirms the perovskite structure of BFO and Rietveld refinement reveals the existence of rhombohedral R3c symmetry.
Journal ArticleDOI
Room-temperature ferromagnetic properties of Fe-doped ZnO rod arrays
TL;DR: In this paper, the exchange interaction between local spin-polarized electrons and conductive electrons is proposed as a cause of the room-temperature ferromagnetic behavior with the remanence of 0.293, 0.613 and 0.557 emu/cm3.
Journal ArticleDOI
Structural, magnetic and photocatalytic properties of La and alkaline co-doped BiFeO3 nanoparticles
TL;DR: In this article, the effect of co-doped alkaline elements (Ba and Ca) on the structural, magnetic and photocatalytic properties of BiFeO3 is studied.
References
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