The book deals with diluted magnetic semiconductors, a class of materials important to the emerging field of spintronics. This volume covers basic semiconductor properties, characteristics of materials with particular attention to silicon and basic principles underlying fabrication processes for devices and ic. Lowtemperature ferromagnetism in a new diluted magnetic. Dederichs iff, research center j ulich, d52425 j ulich, germany abstract we describe exchange interactions in dilute magnetic semiconductors dms based on. A perspective of recent progress in zno diluted magnetic. Solubility of mn into zno exceeds thermal equilibrium limit as. Diluted magnetic semiconductors dmss have generally low mobility less than a few hundreds cm 2 v. In these materials semiconducting properties, both transport and optical, are influenced by the presence of magnetic ions.
Insight into the origin of ferromagnetism in fedoped zno. Kun zeng, zhiyou guo, and xiaoqi gao ain based diluted magnetic semiconductors from first. For all crystals, the transition into a ferromagnetic state with easy axis parallel to the c 3 axis was observed at temperature t c increasing with iron concentration and reaching 12 k at x0. Maggnetic will get the rate and quickness to swipe 25 bases complete thesis on diluted magnetic semiconductor season while legging out triples towards the doubledigit range, but his appropriate product across the bases is completed between first and third, and 2nd and residential on. We have approached this system from two fronts and have found that co zno multilayers at the correct.
Dilute magnetic semiconductor cu2fesns4 nanocrystals with. These new effects are due either to exchange interactions between. Besides elemental, compund and diluted magnetic semiconductors. Diluted magnetic semiconductor thesis proposal diluted magnetic semiconductors dms are very important functional materials that gather two fundamental regions of electron, namely the charge along with the spin, to derive new characteristics in materials. Dilute magnetic semiconducting dms materials materials. The wurtzite transparent semiconductor zno was predicted by dietl et al.
Diluted magnetic semiconductor nanomaterials fabrication by a chemical vapor deposition method a thesis submitted to the graduate faculty of the university of new orleans in partial fulfillment of the requirements for the degree of master of science in applied physics by jingjing liu b. Diluted magnetic semiconductors dms based on iivi compounds3 e. Writing a book on semiconductor device physics and design is never complete and probably never completely satisfying. Abstract we report on the hightemperature ferromagnetism in codoped zno films fabricated by the solgel method above 350 k. Semimagnetic semiconductors smsc and diluted magnetic semiconductors dms have in the past decade attracted considerable attention because they confer many new physical properties on both bulk materials and heterostructures. Magnetic behavlor of 11vi group diluted magnetic semiconductors, based on mn 1. Martin kneip doctoral thesis dissertation physics theoretical physics publish your bachelors or masters thesis, dissertation, term paper or essay. Insight into the origin of ferromagnetism in fedoped zno diluted magnetic semiconductor nanocrystals. The term dms applies generally to semiconductors in which a fraction of its constituent ions are replaced by magnetic ions. Introduction dilute magnetic semiconductors dmss are magnetic materials where parts of the host metal are replaced by magnetic ions of rare earth or transition metals. Conducting 2des is formed at the interface between the insulator and the ptype semi. The race toward a dilute magnetic semiconductor dms that exhibits roomtemperature rt ferromagnetism has been in progress for about 15 years, sparked by the theoretical prediction that the two wide bandgap semiconductors gan and zno would show a curie temperature t c above 300 k if doped with 5% of mn and a large hole concentration of 1. This book presents an analysis of the charge density distribution and other properties of some silicon and germanium based diluted magnetic semiconductors. These doped materials are known as dilute magnetic semiconductors dmss, where usually a transition element is substituted on a small fraction, x, of a host.
Diluted magnetic semiconductors dilute magnetic semiconductors k. Rkky, dilute magnetic semiconductor, monte carlo, size. Miura, in comprehensive semiconductor science and technology, 2011. Katayamayoshida isir, osaka university, 5670047 osaka, japan p. Isovalent doping strategy for manganese introduction into. Diluted magnetic semiconductor c u 2 fesn s 4 nanocrystals with a novel zincblende structure have been successfully synthesized by a hotinjection approach. Although a lot of fundamental studies have been carried out in this type of dms, little application has been realized, except. Structure, size and shape, and magnetic properties article pdf available in turkish journal of physics 411. V based diluted magnetic semiconductor dms nanoparticles of in1xmnxp x. For the contribution history and old versions of the redirected page, please see. It is no secret that silicon devices dominate the semiconductor industry. Epitaxial thin films of an oxidediluted magnetic semiconductor, mn doped zno, were fabricated by pulsedlaser deposition technique. Introduction the subband structure subband structure of cd 1x mn x te cd te the landau levels of cd 1x mn x te cd te magnetic polaron effect acknowledgements references.
Semiconductor like properties are also found in organic compounds like polydiacetylene ch2n with conjugate carbon chains, fullerenes, nanotubes, bn nanotubes, etc. Dilute magnetic semiconductor free download as powerpoint presentation. Diluted magnetic semimagnetic semiconductors december 16, 1986 boston, massachusetts, usa printed from emedia with permission by. Magnetization dynamics in diluted magnetic semiconductor. Pdf we describe exchange interactions in dilute magnetic semiconductors dms based on ab initio calculations. General synthesis and white light emission of diluted. The lattice constant of c axis of wurtzite zn 1x co x o follows vergards law for 0 book deals with diluted magnetic semiconductors, a class of materials important to the emerging field of spintronics. Magnetism and semiconducting properties are known to coexist in some ferromagnetic. Fieldeffect transistors fabricated from diluted magnetic.
We report the densityfunctionaltheory calculations of the exchange interactions and curie temperature for a series of iiiv and iivi diluted magnetic. It presents a detailed treatment of the current state of knowledge of the established properties of dms in the form. An increase in the seebeck coefficient, anomalous hall effect, and resistivity jump at tt c were. The discovery was made in a material called europium nitride and unambiguously confirmed using xray magnetic circular dichroism xmcd. Electronic spin resonance esr was used to study the magnetic properties of this solution. Diluted magnetic semiconductor spintronics abstract deposition of 0. Diluted magnetic semiconductors ferromagnetic semiconductors new materials, nanostructures, interfaces.
Diluted magnetic semiconductors dms are intriguing materials for spintronic applications that offer the possibility of studying magnetic phenomena in crystals with a simple band structure and. The nanocrystals were characterized by means of xray diffraction xrd. Quantum transport in diluted magnetic semiconductors. The magnetic behavior of diluted magnetic semiconductors.
The materials were prepared using either mnii or mniii salts as dopants and the resulting nanoparticles have. But during the last decade the paradigm has shifted. Magnetization dynamics in diluted magnetic semiconductor heterostructures dr. The advantage of dms, compared to metals, is that conductivity of the injector is similar to that of the nonmagnetic semiconductor used in applications, and in this way the conductance mismatch problem can be overcome. A quantitative analysis of the charge density distribution has been done in order to obtain measurements of the charges involved in the bonding, which are decisive for the physical and. Semiconductordms interfaces can be made by introducing the dopant during the growth process, this controllability is especially evident in processes such as mbe, where it. Magnetic beha vlor of 11vi group diluted magnetic semiconductors, based on fe 1. Exposed to microscope light, a 10 times current enhancement is observed in the doped nanowirebased devices due to the significant modification of the.
General synthesis and white light emission of diluted magnetic semiconductor nanowires using singlesource precursors. Magnetic circular dichroism mcd in corelevel absorption diluted magnetic semiconductors magnetic semiconductors. Actually, the concentration of the magnetic impurities is much higher. Classical magnetic semiconductors diluted magnetic. Ain based diluted magnetic semiconductors from first. This handbook is a revised and updated version of the original handbook on s e m i c o n d u c t o r s published in 1982. The contents of the znobased diluted magnetic semiconductors page were merged into magnetic semiconductor on 26th july 2016. The primary aim of a dms is compatibility with existing semiconductor structures and materials. A perspective of recent progress in zno diluted magnetic semiconductors 243 table 1 experimental studies of spin coherence in zno material type of spin lifetime spin lifetime temperature method note reference year zno bulk single crystal electron spincoherence time. Single crystals of a new diluted magnetic semiconductor bi 2.
1184 487 483 318 447 1203 1122 1459 88 1111 545 1510 783 695 879 782 664 439 751 294 100 1475 403 1306 617 1447 300 843 1038 1293 20