electric properties of magnetic nanostructured matter

... the type of crystal structure conversion should be the two most important reasons Investigation of the magnetic properties of Fe3 O4 and ␥-Fe2 O3 nanotubes revealed that both the two magnetic ... and properties of single-crystalline ␥-Fe2 O3 nanowires The Journal of Physical Chemistry C, 111(13), 5034–5038 Huang, Z B., & Tang, F J (2005) Preparation, structure, and magnetic properties of ... synthesized products possess more properties of MD structures, the magnetic domain walls would exist inside the particles For MD materials, the movement of magnetic domain walls is the main reason...

Ngày tải lên: 20/03/2014, 13:06

... thin layer of 3-aminopropyltriethoxysilane (APS) patterned substrate by selecting an organic solvent [12] They also studied the effect of doping by APS on the electric properties of the CNT In ... immobilization of biomolecules on the CNT-FET For immobilization of biomolecules on the device surface, ODT might be a problem for immobilization of the biomolecules because of their lack of chemical ... adsorption of oxygen gas [14] Effects of molecule binding to the CNT surface have been investigated by many research groups Reportedly, the APS molecule changes the electric properties of the CNT-FET...

Ngày tải lên: 22/06/2014, 18:20

... determining the microstructure, magnetic and transport properties of the magnetic oxide thin films (2) A whole picture of the structure and magnetic properties of half metallic magnetite (Fe3O4) ... XI LIST OF FIGURES Figure 1 The density of state of non -magnetic, ferromagnetic, and half metallic meterials Figure Schematic diagram of Spin filter tunneling Below the TC of the ferromagnetic ... dependent transport properties of magnetic oxide materials with a high degree of spin polarization A research into the unique properties of magnetic oxides is one of the most important issues for...

Ngày tải lên: 09/09/2015, 10:15

... Permeability of Fe phase µ2 Permeability of Fe3O4 phase ε1 Permittivity of Fe phase ε2 Permittivity of Fe3O4 phase v1 Volume fraction of Fe phase v2 Volume fraction of of Fe3O4 phase d Diameter of the ... coefficient The first step of the design of magnetic absorber is to select good magnetic filler(s) for the magnetic absorber The intrinsic permeability of several magnetic metallic materials ... to consist of many grains with a random distribution of magnetic anisotropy axes Each particle contains many magnetic domains The magnetization of a magnetic domain is parallel to its magnetic...

Ngày tải lên: 11/09/2015, 09:18

... which can improve thermoelectric properties The effect of the pores will be investigated in future work Figure gives the temperature dependence of electrical conductivity of these La-doped CaMnO3 ... Lattice parameters of the Ca1−x Lax MnO3 series as a function of La substitution content can be well understood based on the fact that the ionic radius of La3+ is larger than that of Ca2+ Figure ... reveals that La ions can replace the Ca sites The substitution of the Ca sites with trivalent La ions will lead to the variation of electric properties, and the detailed results will be given in the...

Ngày tải lên: 26/09/2016, 20:42

... increase up-spin of positions 2a and 2b About the role of La to improve hard magnetic properties of hexagonal ferrite, the Vietnamese researchers have published a large number of publications ... al Magnetic Properties of La-Co substituted M-Type Sr-Ferrite ultrafine Powders prepared from citrate recursors, Proc of the ICF9, SanFrancisco, California, USA (2004) 75 [9] L Neél Magnetic Properties ... and properties of Sr ferrite, J Phys IV, France (1997) CI 313 [17] N.Chau, N.K.Dung, D.L.Minh, B.T.Cong, High hard magnetic properties of Sr hexagonal ferrite substituted by La, Proceedings of...

Ngày tải lên: 13/02/2014, 03:20

... hence it was the increasing of HC The increasing of HC proved that the soft magnetic property of ferrite NiFe2O4 changed to the hard magnetic property of ferrite CoFe2O4 Ni-Co ferrite samples ... part of several tens percent of HC and the last one whereas can only reach several hundreds of gauss Thus, the increasing of Co-concentration led to the increasing of anisotropy property of ferrites ... in an increasing magnetic moment per formula of Ni1-xCoxFe2O4 and equivalently, an enhancement of magnetization [7].The dependence of saturation magnetization Ms as a function of Co2+ concentration...

Ngày tải lên: 13/02/2014, 04:20

... ¼ 80 K with a magnetic moment of 2:5mB per atom of iron [17] The a-Fe2O3 phase is antiferromagnetic (paramagnetic) at temperatures To260 K (T4T N 950 K) while a destabilization of their perfect ... oxides In order to determine the magnetization contribution of different magnetic phases, a basic knowledge for the magnetic properties of bulk Fe and its oxides is crucial It is well known that ... magnetization at K of the asprepared sample in an applied field of T is as large as 56 Am2 =kg, arising from the magnetization of metallic Fe and its oxides Assuming a magnetic moment of 2:2mB per iron...

Ngày tải lên: 20/03/2014, 13:08

... superparamagnetic properties of Ni-Zn ferrite for nano-bio fusion applications ware reported [13] In this paper we study magnetic and electric properties including canting structure of Ni-Zn ... between direction of magnetic moment of A ions and magnetic moment of B1 and B2 ions Comparing MSt and MSe from Tab 2, we could determine the canting angle between magnetic moments of B1 and B2 ions ... structure of samples was checked by X-ray diffractometer D5005, Bruker and the microstructure of samples was examined by Scanning Electron Microscope (SEM) Jeol LV5410 Magnetic properties of ferrites...

Ngày tải lên: 22/03/2014, 11:20

... of the inuence of the heme orientation on functional properties of myoglobin Biochim Biophys Acta 1388, 349362 Emerson, S.D & La Mar., G.N (1990) NMR determination of the orientation of the magnetic ... R.J.P (1985) Comparison of the solution and crystal structures of mitochondrial cytochrome c Analysis of paramagnetic shifts in the nuclear magnetic resonance spectrum of ferricytochrome c J Mol ... conservation of the magnetic anisotropies of low-spin hemin with His/cyanide ligation The 10 tilt of the major magnetic or z-axis is shown to be consistent with the % 10 tilt of the Fe-CN vector...

Ngày tải lên: 23/03/2014, 17:22

... the seed and the feed of this thesis It is a long list of collaborators working in the groups of Prof T.W Ebbesen, Prof S.I Bozhevolnyi, Prof D Bäuerle, Prof J.R Kreen, Prof A Dereux and A.V Kats ... metal thickness and the study of optical properties of metal coated microspheres), the optical properties of metamaterials made with stacked hole arrays and the guiding of metallic waveguides (and ... electromagnetic fields interacting with objects of size smaller than, but of the order of, the wavelength of the field remained largely unexplored The reason was the failure, in that regime, of the...

Ngày tải lên: 29/05/2014, 18:40

... because of their own enormous importance, methods of describing electric and magneto-optical properties are then shortly discussed (Chapter 16) and applied to magnetic nanostructured matter (Chapters ... Vienna He is a fellow of the American Physical Society and a receiver of the Ernst Mach medal of the Czech Academy of Sciences (1998) In 2004 he acted as coordinator of a team of scientists that ... 3-atom-wide Co shell By courtesy of the authors of Ref [2] FIGURE 1.6: Theoretical image of a quantum corral consisting of 48 Fe atoms on top of Cu(111) From Ref [3] are a kind of upper limit for nanostructures,...

Ngày tải lên: 04/06/2014, 14:26

... Effect of electrical conduction properties on magnetic behaviors of Cudoped ZnO thin films Physica B 2010, 405:4678 17 Wang Q, Sun Q, Jena P, Hu Z, Note R, Kawazoe Y: First-principles study of magnetic ... images of ZnO NPs with different Zr contents the result, those motivated us to carry out a comparative study on their magnetic properties Magnetization curves as a function of applied magnetic ... at RT of samples are revealed in Figure 6, where the contributions of the paramagnetism (PM) signals of the samples were deducted In the inset of Figure 6, which displays the M-H curves of the...

Ngày tải lên: 20/06/2014, 22:20

... Kaiser M: Effect of nickel substitutions on some properties of Cu-Zn ferrites J Alloy Compd 2009, 468(1-2):15-21 19 Iqbal MJ, Siddiquah MR: Electrical and magnetic properties of chromiumsubstituted ... magnetic and optical properties of the ferrite nanoparticles for a variety of magneto-optical nanodevice applications From a synthesis point of view exploring the effect of firing temperatures ... state of the zinc ferrite nanoparticles starts to transfer from the ferromagnetic state to the paramagnetic state With the increase of the firing temperature up to 800°C the hysteresis loop of the...

Ngày tải lên: 21/06/2014, 01:20

... concentrations of ferro-nanofluids were applied to the magnetic cores of transformers The performance of transformers with magnetic cores of air Figure The coupling coefficients of transformers ... factor of coils of transformers with different magnetic cores Owing to the fact that the increase of resistance is larger and faster than that of inductance with the presence of Fe3 O4 nanofluids, ... magnetized curve of the Fe O nanofluid measured by a VSM Results and discussion Different magnetic cores, air, and Fe3O4 nanofluids of 0.25, 0.5, 0.75, and M were applied as the magnetic core of transformers...

Ngày tải lên: 21/06/2014, 04:20

... Tunable magnetic properties of heterogeneous nanobrush: from nanowire to nanofilm Nanoscale Res Lett 2010, 5:853-858 Silverberg J, Friedman A, Menon L: Growth and magnetic properties of polycrystalline ... is that of Co/InP nanocomposites Magnetic properties of Co/InP nanocomposites Figure shows field-dependent magnetization (M-H) curves of such Co/InP nanocomposites, where the applied magnetic ... synthesis of an array of nickel nanotubules and its magnetic behavior Adv Mater 2001, 13:1631-1633 Li DD, Thompson RS, Bergmann G, Lu JG: Template-based synthesis and magnetic properties of cobalt...

Ngày tải lên: 21/06/2014, 04:20

... of 8.86 Å (5 × 1.772 Å) is consistent with that of the [200] planes of single-crystalline face-centered Co, which is compatible with the data of XRD The SAED patterns (see the inset in Page of ... superparamagnetic CoFe2O4 microspheres with high saturation magnetization Nanoscale Res Lett 2010, 5:1718 Cao H, Xu Z, Sang H, Sheng D, Tie C: Template synthesis and magnetic behavior of an array of ... multiple branches because of the stronger anisotropic magnetic forces, and these findings are in agreement with those of our earlier article [17] Despite the presence of the amorphous buffer layer,...

Ngày tải lên: 21/06/2014, 04:20

... a magnetic moment of μB per chromium atom, which is independent of the number of monolayers As the FM rutileCrO2 is unstable at ambient temperature, and known to be stabilized when on top of ... Abbreviations AFM: anti-ferromagnetic; FM: ferromagnetic; GGA-PBE: generalized gradient approximation and the Perdew, Burke, and Ernzerhof; NM: non -magnetic; PDOS: projected density of states; SL: superlattice; ... Density of states and total energies for the SL with n=10 (a) Total density of states (in black) and project density of states (in gray) for the Cr–3d (b) Total energies for the non magnetic...

Ngày tải lên: 21/06/2014, 05:20

Ngày tải lên: 21/06/2014, 08:20

... structures The roomtemperature and low-temperature magnetic properties of these SNTs were investigated The study of pure c-Fe2O3 SNTs and their magnetic properties is a key issue, not only for practical ... exhibit weak ferromagnetic and soft magnetic behaviors [26] The structure of a-Fe2O3 can be described as consisting hcp arrays of oxygen ions stacked along the [001] direction Two-thirds of the sites ... unless the magnetic properties of magnetic materials are improved [39] Conclusions The approach used in this study provides a simple and inexpensive method for the preparation of stable and magnetic...

Ngày tải lên: 21/06/2014, 17:20