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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Raman spectroscopy of (Mn, Co)-codoped ZnO films
ChaoLing Du,Zheng-Bin Gu,Ming-Hui Lu,Jiming Wang,Shan Tao Zhang,Jijun Zhao,Guangxu Cheng,H. Heng,Yan-Feng Chen +8 more
TL;DR: In this article, the authors investigated the Raman spectra of (Mn, Co)-codoped ZnO films as functions of laser line and temperature, and found that the intensity of different phonon modes exhibits redshift with temperature increasing, which can be attributed to anharmonic effect in the material.
Journal ArticleDOI
Ferromagnetism in ZnO Nanowires Derived from Electro‐deposition on AAO Template and Subsequent Oxidation
TL;DR: In this article, a room-temperature ferromagnetism in ZnO nanowires derived from electrodeposition on anodic aluminum oxide (AAO) template and subsequent oxidation was reported through a controlled synthesis process.
Journal ArticleDOI
Synthesis and magnetic properties of Mn doped ZnO nanowires
Sasanka Deka,P. A. Joy +1 more
TL;DR: In this article, an autocombustion method was used to synthesize Mn doped ZnO nanowires, which were characterized by X-ray diffraction and transmission electron microscopy.
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The discovery, development and future of GMR: The Nobel Prize 2007
TL;DR: GMR is only manifest in nanoscale materials, and the development of nanotechnology growth techniques was a necessary pre-requisite; further, the considerable demands of the magnetic data storage industry to drive up the data density stored on a hard disk fuelled an enormous international research effort following the initial discovery with the result that more than 5 billion GMR read heads have been manufactured since 1997, ubiquitous in hard disks today as mentioned in this paper.
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Study of structural, optical and magnetic properties of cobalt doped ZnO nanorods
TL;DR: In this article, a micro-Raman study of Co-doped zinc oxide nanostructures indicates the incorporation of Co in ZnO and the observed ferromagnetism may have originated due to the exchange interaction between the localized d electrons in Co2+ atoms and free carriers generated due to Co doping.
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.
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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.