Journal ArticleDOI
Magneto-optical properties of ZnO-based diluted magnetic semiconductors
K. Ando,Hidekazu Saito,Zhengwu Jin,Tomoteru Fukumura,Masashi Kawasaki,Yuji Matsumoto,Hideomi Koinuma +6 more
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TLDR
The magnetic circular dichroism (MCD) spectra of Zn1−xTMxO (TM=Sc, Ti, V, Cr, Mn, Co, Ni, and Cu) films were measured to clarify their magneto-optical properties as mentioned in this paper.Abstract:
Magnetic circular dichroism (MCD) spectra of Zn1−xTMxO (TM=Sc, Ti, V, Cr, Mn, Co, Ni, and Cu) films were measured to clarify their magneto-optical properties. Noticeable magneto-optical effect was not observed for Zn1−xScxO, Zn1−xTixO, Zn1−xVxO, and Zn1−xCrxO. On the contrary, Zn1−xMnxO, Zn1−xCoxO, Zn1−xNixO, and Zn1−xCuxO showed pronounced negative MCD peaks near 3.4 eV which correspond to the band gap of the host ZnO semiconductor. These results show that ZnO alloyed with Mn, Co, Ni, and Cu is a diluted magnetic semiconductor with strong exchange interaction between sp-band carriers and localized d electrons.read more
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Journal ArticleDOI
A comprehensive review of zno materials and devices
Ümit Özgür,Ya. I. Alivov,C. Liu,A. Teke,Michael A. Reshchikov,Seydi Doğan,Vitaliy Avrutin,Sang-Jun Cho,Hadis Morkoç +8 more
TL;DR: The semiconductor ZnO has gained substantial interest in the research community in part because of its large exciton binding energy (60meV) which could lead to lasing action based on exciton recombination even above room temperature.
Journal ArticleDOI
Ferromagnetism above room temperature in bulk and transparent thin films of Mn-doped ZnO
Parmanand Sharma,Parmanand Sharma,Amita Gupta,K. V. Rao,Frank J. Owens,Renu Sharma,Rajeev Ahuja,J. M. Osorio Guillen,Börje Johansson,Börje Johansson,G. A. Gehring +10 more
TL;DR: The first observations of ferromagnetism above room temperature for dilute (<4 at%) Mn-doped ZnO semiconductors are reported, promising new spintronic devices as well as magneto-optic components.
Journal ArticleDOI
High temperature ferromagnetism with a giant magnetic moment in transparent co-doped SnO(2-delta).
S. B. Ogale,R. J. Choudhary,James P. Buban,Samuel E. Lofland,S. R. Shinde,Sangeeta Kale,V. N. Kulkarni,Joshua Higgins,C. Lanci,Jeffrey R. Simpson,Nigel D. Browning,S. Das Sarma,H. D. Drew,R. L. Greene,T. Venkatesan +14 more
TL;DR: The occurrence of room temperature ferromagnetism is demonstrated in pulsed laser deposited thin films of Sn(1-x)Co(x)O(2-delta) (x<0.3) and a giant magnetic moment of 7.5+/-0.5 micro(B)/Co, not yet reported in any diluted magnetic semiconductor system.
Journal ArticleDOI
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
Ferromagnetism of ZnO and GaN: A Review
C. Liu,F. Yun,Hadis Morkoç +2 more
TL;DR: In this article, a review of the recent progress in the theoretical and experimental studies of ZnO-and GaN-based DMSs is presented, focusing on the structural, optical, and magnetic properties of these materials.
References
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Journal ArticleDOI
Zener Model Description of Ferromagnetism in Zinc-Blende Magnetic Semiconductors
TL;DR: 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.
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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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Material Design for Transparent Ferromagnets with ZnO-Based Magnetic Semiconductors
TL;DR: Ferromagnetic ordering of ZnO-based magnetic semiconductors was investigated by ab initio calculations based on the local density approximation in this article, and it was shown that 3D transition metal atoms of V, Cr, Fe, Co and Ni showed the ferromagnetic order of their magnetic moments in ZnOs without any additional carrier doping treatments.
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An oxide-diluted magnetic semiconductor: Mn-doped ZnO
TL;DR: In this article, the lattice constants of both a and c axes of wurtzite Zn1−xMnxO films (x < 0.35) increase and the band gap expands although considerable in-gap absorption develops.
Journal ArticleDOI
Valence-band ordering in ZnO
TL;DR: In this paper, the emission and reflection spectra of ZnO have been investigated in the intrinsic region and the data have been interpreted in terms of the wurtzite crystal band structure.