Growth and characterisation of spintronics materials

... Chapter CVD growth of CrO2 and fabrication of Devices 5.1 CVD growth of CrO2 5.2 Characterization of CrO2 thin films 5.2.1 XRD and surface roughness 5.2.2 Magnetic properties 5.2.3 Effect of Ion Milling ... Application of DMS and (Zn, TM)O 1.4 CrO2 1.4.1 CrO2 1.4.2 Growth and characterization of CrO2 1.5 Application of CrO2 1.6 Motivation of researches Referenc...

Ngày tải lên: 07/10/2015, 10:10

Ngày tải lên: 14/11/2014, 07:51

... semiconductor”, Adv Mater 16 , 211 5 (2004) 12 1 S Ramachandran, A Tiwari, and J Narayani, “Origin of room-temperature ferromagnetism in cobalt- doped ZnO”, J Electronic Mater 33, 12 98 (2004) 12 2 H J Lee, G ... properties of Co -doped ZnO nanoparticles”, Appl Phys Lett 86, 10 311 3 (2005) 75 J S Hong and R Q Wu, “Magnetic ordering and x-ray magnetic circular dichroism of...

Ngày tải lên: 12/09/2015, 08:18

... (Zn0.75Co0 .25 O + CoO + Co) structures, respectively [After J H Kim, 20 02, Ref 12] 50 Chapter Cobalt doped zinc oxide 2. 3 .2. 2 Choice of dopants As ZnO can be both p-type and n-type doped, the choice of ... 1 725 02 (20 06) 72 Chapter Cobalt doped zinc oxide 22 K Sato and H K Yoshida, “Stabilization of ferromagnetic states by electron doping in Fe-, Co- or...

Ngày tải lên: 12/09/2015, 08:18

... s for -doped samples at a sputtering power of 10 W For the co -doped samples, Co was added to ZnO:Al by co-sputtering Co with ZnO and Al2O3 On the other hand, in -doped samples, Co was doped “digitally” ... Al2O3 Substrate e) Deposit Al2O3, Lift-off f) Ion-mill to form Hall bar Al2O3 Substrate Al2O3 Substrate g) Coat resist h) Write electrodes, develop Al2O3 Substrate Al2O3 Substrate...

Ngày tải lên: 12/09/2015, 08:18

... the peak at 44 .5o was near peak positions of CoO (200) 107 Chapter Structural Characterization FCC at 40 .6o and 42 .4o, Co (111) at 44 .217o, ZnCo2O4 (40 0) at 44 .74o and Co3O4 (40 0) at 44 .81o For ... state of Co in ZnCo2O4 and Co3O4 was 3+ and 4+ , and that in Co clusters was 0, respectively In comparison, the corresponding δ -doped Co98s sample, showed a variation...

Ngày tải lên: 12/09/2015, 08:18

... formation of other secondary phases 133 Chapter Magnetic properties and its origins 0. 05 0.10 0. 15 0.20 0. 25 0.30 0. 35 0. 05 0.10 0. 15 0.20 0. 25 0.30 0. 35 Figure 5- 4 (a) In-plane M-H curves of co -doped ... in-plane and out -of- plane configuration and corrected M-H curves (b), (d) and (f) respectively Out -of- plane M-H curves for co -doped sample Co3W (Zn0.95C...

Ngày tải lên: 12/09/2015, 08:19

... (Ohm) 1 .66 E+022 1 .66 ×10 1 .64 E+022 1 .64 ×10 (c) 1 .62 E+022 1 .62 ×10 1 .60 E+022 1 .60 ×10 1.58×10 1.58E+022 1. 56 102 1.56E+02 -0.04 -0.02 0.02 0.04 Field (T) Figure 6- 13 dI/dV curves as a function of bias ... in Co -doped samples 150 Chapter Origin of ferromagnetism from transport studies 1. 966 20K 1. 964 -3 1. 962 10K 8K 1. 960 6K 1.958 (a) -2 50K 7 .62 30K 7 .60 10K 7.58 4....

Ngày tải lên: 12/09/2015, 08:19

... XRD and TEM data suggested that, although Co clusters had been formed in heavily co -doped samples, the dominant phase of these samples was still in the form of Co -doped ZnO The formation of substitutional ... composition for formation of secondary phases and Co clusters could be identified clearly On the other hand, the shape of the MR curves for heavily doped samples rese...

Ngày tải lên: 12/09/2015, 08:19

... concentration of sodium to the surface, where it then carbonates A selection of typical powder X-ray diffraction patterns of the starting materials and polymers of different compositions is shown ... carbonate by atmospheric carbonation Polymer compositions which not cure satisfactorily show FTIR evidence of carbonation, by contrast with optimum curing compositions The water con...

Ngày tải lên: 30/05/2014, 12:08

... PB-Nr: S05 Supply and stock of raw materials flow/process documentation/competence Issed by Hr Bauer Date of release Version 00 Page 2/5 PB-Nr: S05 Supply and stock of raw materials Supplier ... Delivery of raw material and other goods Refuse of acceptance Control of delivery papers Stock supply Supply Information to Purchasing Check goods of damages...

Ngày tải lên: 25/01/2014, 00:20

... regarding the rise of the economic power of Western Europe and the United States and the causes of the decline of the economic power It is also an appeal to the professional economists and academicians ... verge of collapse? Or does it mean the prosperity of the limited companies and business houses of the nation, their assets and profitability...

Ngày tải lên: 21/02/2014, 14:20

... annealing and (b) after annealing two emission bands around 550 and 600 nm, as indicated in Fig 5a Each nanowire consists of a crystalline Si core and an amorphous SiOx shell The core and shell both ... crystalline silicon self-assembly Under the 488 nm excitation of an Arþ laser, the PL of the Si/ SiOx nanowires corresponds to Fig Photoluminescence spectra for...

Ngày tải lên: 16/03/2014, 15:08

... Andreas Öchsner Lucas F M da Silva Holm Altenbach • Editors Mechanics and Properties of Composed Materials and Structures 123 Editors Andreas Öchsner Department of Applied Mechanics Faculty of ... mechanism of opening and closing of cracks under cyclic load, transfer of shear stresses, anisotropic properties of strength and stiffness of masonry in horizon...

Ngày tải lên: 16/03/2014, 22:20

... MECHANICS AND ANALYSIS OF COMPOSITE MATERIALS MECHANICS AND ANALYSIS OF COMPOSITE MATERIALS Valery V Vasiliev Professor of Aerospace Composite Structures Director of School of Mechanics and ... elasticity, mechanics of composite materials, design, analysis, fabrication, and application of composite structures According to the list of books o...

Ngày tải lên: 22/03/2014, 12:20