Room temperature ferromagnetism study of tio2 based magnetic semiconductors by pulsed laser deposition
Room temperature ferromagnetism study of tio2 based magnetic semiconductors by pulsed laser deposition
... to magnetic properties, semiconductors can be classified as magnetic semiconductors, dilute magnetic semiconductors, and non -magnetic semiconductors in terms of the amount and distribution of magnetic ... Diluted magnetic semiconductors (DMS), alloys between nonmagnetic semiconductors and magnetic elements, are semiconductors formed by replacing a fraction of...
Ferromagnetism study of dilute magnetic semiconductors by pulsed laser deposition
... between nonmagnetic semiconductors and magnetic elements is the next generation of magnetic semiconductors [1.2] They are semiconductors formed by replacing a fraction of the cations in a range of compound ... different from magnetic semiconductors in which one of the two sub-lattices is constituted by magnetic ions The incomplete d-shell of the magnetic atoms...
DEFECT INDUCED NOVEL ELECTRICAL, MAGNETIC AND OPTICAL PROPERTIES OF TIO2 THIN FILMS GROWN BY PULSED LASER DEPOSITION
... electronic and magnetic properties of epitaxially grown transition metal doped TiO2 thin films by pulsed laser deposition technique on different metal oxide substrates Crystal Structure of TiO2 TiO2 ... magnetic semiconductor applications The objective of this thesis is to investigate the defect induced electrical, optical, magnetic and structural p...
Structural, magnetic and transport study of DBPLD fabricated magnetic semiconductors 4
... Phys Lett 81, pp 42 12 -42 14, 2002 45 H.-J Lee, S.-Y Jeong, C.R Cho and C.-H Park, Study of diluted magnetic semiconductor: Co-doped ZnO, Appl Phys Lett 81, pp 40 20 -40 22, 2002 46 K Rode, A Anane, ... center of the bandgap, and the relative position of Fermi level and the top of the valence band, EF − Ev for Zn1-xCoxO is that EF − Ev ≈ 1.6 eV, similar to that of ZnO...
Structural, magnetic and transport study of DBPLD fabricated magnetic semiconductors 1
... such as Ga1-xMnxN [15 ], Ga1-xMnxAs [1] , (In,Mn)As [16 ], Cd1-xMnxTe [17 ], Zn1-xMnxO (M=TM) [18 ] and Zn1-xMnxO [19 ] Ⅱ-Ⅵ compounds semiconductor includes a variety of compounds consisting of various ... the distribution of impurities and local magnetization, and the understanding of the magnetic ordering and underlying mechanisms [67] National University of Singapore 1...
Structural, magnetic and transport study of DBPLD fabricated magnetic semiconductors 2
... 120 000 (d) Co 0.015 Co 0.03 Co 0.05 Co 0.09 Co 0 .25 Co 0.41 CoO Co 2p3 /2 20000 18000 16000 Co 14000 20 000 120 00 1017 1018 1019 1 020 1 021 1 022 1 023 1 024 1 025 776 Binding Energy (eV) 778 780 7 82 ... 16000 O1 O2 120 00 O1 22 000 18000 14000 Co 0.015 Co 0.03 Co 0.05 Co 0.09 Co 0 .25 (b) 24 000 Intensity(a.u.) 26 000 20 000 18000 16000 14000 120 00 10000 10000 8000 8000 524 526...
Structural, magnetic and transport study of DBPLD fabricated magnetic semiconductors 3
... 200 250 30 0 T (K) Fig 6 -3( a) Magnetic loop of the thin film with Co concentration of x = 0.02 measured at 30 0 K by SQUID Inset: Enlarged view of the low field region to show the presence of hysteresis ... hysteresis and remanence for the samples measured at 30 0, 100 and 30 K; (b) Hc dependence on temperature of the film with Co concentration of x = 0.02 National Uni...
Structure and properties of lead zirconate titanate thin films by pulsed laser deposition
... the deposition and growth structure of the thin films They are listed as bellow: 1) Laser power, wavelength, pulse length and repetition rate; 2) Interaction of laser with target such as laser ... Physics, 97, 073905 (2005) W C Goh, K Yao and C K Ong, Effects of microstructure on the properties of ferroelectric lead zirconate titanate (PZT) thin films, A...
Growth and characterization of oxide thin films on silicon by pulsed laser deposition
... method of pulsed laser deposition (PLD); investigate the growth mechanism of high quality MgO films on silicon Fabricate highly oriented CoFe2O4 films on silicon with the help of MgO buffer layer and ... thesis 2.1.1 Pulsed- laser deposition One of the most significant approaches to oxide film growth is pulsed- laser deposition Pulsed- laser dep...
Room tepmeaterature ferromagnetism in zno based magnetic semiconductors and carbon related systems
... promising candidates for spintronics materials The ferromagnetism mechanism in ZnO based and carbon based systems are probably similar [63] Therefore, to further study the ferromagnetism in carbon ... providing explanations for the high temperature ferromagnetism in ZnO materials, such as nonmagnetic metal clusters inducing ferromagnetism in metallic Zn doped...
Temperature-Controlled Growth of Silicon-Based Nanostructures by Thermal Evaporation of SiO Powders
... Conclusion Silicon-based nanostructures with different colors, morphologies, and microstructures were formed over a wide temperature range from 890 to 1320 °C by thermal evaporation of SiO powders ... decomposition of SiO described by 2SiO ) Si + SiO2 After the Si nucleus is formed, it will grow into a larger particle by continuously adsorbing SiO from the vapor ph...
study of wo3-based sensing materials for nh3 and no detection
... Conclusions The sensing materials of WO loaded with wt.% metal oxides were prepared and applied for NH and NO detection, and several composition materials with good responses, both to NH and NO, were ... NO. , and fast response to NH and NO compared with pure WO The materials of WO loaded with wt.% Cr, La, Pr, Sm, Gd, Er, Tm and Yb showed good responses to N...
Báo cáo hóa học: " Room-temperature nonequilibrium growth of controllable ZnO nanorod arrays" ppt
... growth of ZnO nanorod arrays There were several parameters affecting the growth characteristics of ZnO nanorod arrays, such as molar ratio of Zn2+ to OH-, zinc ion concentration, and volume of ... http://www.nanoscalereslett.com/content/6/1/477 studied The formation of ZnO nanorod arrays was influenced by the concentration of growth medium and the molar ratio of...
Theoretical study of carbon based materials and their applications in nanoelectronics
... THEORETICAL STUDY OF CARBON- BASED MATERIALS AND THEIR APPLICATIONS IN NANOELECTRONICS KAI-TAK LAM A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILIOSOPHY DEPARTMENT OF ELECTRICAL AND COMPUTER ... vii in obtaining GNRs by unzipping carbon nanotubes has made the prospect of fabricating GNR -based electronic devices in large quantities more promising an...
Brillouin scattering study of magnons in magnetic nanostructures 1
... Magn Mater 290-2 91, 530 (2005) Chapter Chapter Brillouin Scattering from Spin Waves Brillouin Scattering from Spin Waves 2 .1 Introduction Since the 19 80’s, Brillouin light scattering (BLS) has proved ... devices Since this research uses BLS as the main investigation tool for studying spin waves, the basic theories of Brillouin scattering and of spin waves will be pres...