Journal ArticleDOI
Zener Model Description of Ferromagnetism in Zinc-Blende Magnetic Semiconductors
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TLDR
Zener's model of ferromagnetism, originally proposed for transition metals in 1950, can explain T(C) of Ga(1-)(x)Mn(x)As and that of its II-VI counterpart Zn(1)-Mn (x)Te and is used to predict materials with T (C) exceeding room temperature, an important step toward semiconductor electronics that use both charge and spin.Abstract:
Ferromagnetism in manganese compound semiconductors not only opens prospects for tailoring magnetic and spin-related phenomena in semiconductors with a precision specific to III-V compounds but also addresses a question about the origin of the magnetic interactions that lead to a Curie temperature (T(C)) as high as 110 K for a manganese concentration of just 5%. Zener's model of ferromagnetism, originally proposed for transition metals in 1950, can explain T(C) of Ga(1-)(x)Mn(x)As and that of its II-VI counterpart Zn(1-)(x)Mn(x)Te and is used to predict materials with T(C) exceeding room temperature, an important step toward semiconductor electronics that use both charge and spin.read more
Citations
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Epitaxial thin film ZnFe2O4: a semi-transparent magnetic semiconductor with high Curie temperature
Y F Chen,D Spoddig,M Ziese +2 more
TL;DR: Semi-transparent ZnFe2O4 films were fabricated by pulsed laser deposition on MgAl 2O4 substrates in this article, showing epitaxial growth and a zinc-to-iron ratio of close to 1 : 2.
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Fe-implanted ZnO: Magnetic precipitates versus dilution
Shengqiang Zhou,Kay Potzger,G. Talut,Helfried Reuther,J. von Borany,Rainer Groetzschel,Wolfgang Skorupa,Manfred Helm,Jürgen Fassbender,N. Volbers,Michael Lorenz,T. Herrmannsdoerfer +11 more
TL;DR: In this article, different implantation fluences and temperatures and post-implantation annealing temperatures have been chosen in order to evaluate the structural and magnetic properties over a wide range of parameters.
Journal ArticleDOI
Activation of room-temperature ferromagnetism in nonstoichiometric TiO2-δ powders by oxygen vacancies
TL;DR: In this paper, an analysis of X-ray photoelectron spectroscopy spectra indicates that the concentration of oxygen vacancies increases with prolonging annealing time in H2/Ar mixture.
Journal ArticleDOI
Abnormal room temperature ferromagnetism in CuO/ZnO nanocomposites via hydrothermal method
TL;DR: In this article, the abnormal room temperature ferromagnetism was discovered at the interface between diamagnetic ZnO and antiferromagnetic CuO, which can be tuned by changing the phase ratios.
Journal ArticleDOI
Room temperature ferromagnetic and ultraviolet optical properties of Co-doped ZnO nanocluster films
Jiji Antony,Sweta Pendyala,Amit Sharma,Xiang-Bai Chen,John L. Morrison,Leah Bergman,You Qiang +6 more
TL;DR: In this paper, 2% and 5% Co-doped ZnO nanocluster films at room temperature (RT) were prepared using doped znO nanoparticles as building blocks and the average nanocrystallite size was ∼7.5nm.
References
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Journal ArticleDOI
Making Nonmagnetic Semiconductors Ferromagnetic
TL;DR: The magnetic coupling in all semiconductor ferromagnetic/nonmagnetic layered structures, together with the possibility of spin filtering in RTDs, shows the potential of the present material system for exploring new physics and for developing new functionality toward future electronics.
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Diluted magnetic semiconductors
TL;DR: In this paper, the physical properties of diluted magnetic semiconductors (DMS) of the type AII1−xMnxBVI (e.g., Cd1−mnxSe, Hg 1−mnsTe) were reviewed.
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(Ga,Mn)As: A new diluted magnetic semiconductor based on GaAs
Hideo Ohno,Aidong Shen,Fumihiro Matsukura,Akira Oiwa,Akira Endo,Shingo Katsumoto,Yasuhiro Iye +6 more
TL;DR: In this article, a new GaAs-based diluted magnetic semiconductor, (Ga,Mn)As, was prepared by molecular beam epitaxy and the lattice constant was determined by x-ray diffraction and shown to increase with the increase of Mn composition, x.
Journal ArticleDOI
Interaction Between the d Shells in the Transition Metals
TL;DR: In this paper, it is shown that the spin coupling between the incomplete $d$ shells and the conduction electrons leads to a tendency for a ferromagnetic alignment of $d $ spins.