Formation and Characterization of Magnetic Multilayer Ni/Cu Nanowires

2005 ◽  
Vol 877 ◽  
Author(s):  
R. S. Liu ◽  
S. C. Chang ◽  
S. F. Hu ◽  
C. Y. Huang
Keyword(s):  
Magnetic Force ◽  
Ferromagnetic Layer ◽  
Magnetic Multilayer ◽  
Alumina Membrane ◽  
Cu Nanowires ◽  
Force Microscopy ◽  
Transmission Electron ◽  
Multilayer Nanowires ◽  
Metal Layers

AbstractHighly ordered composite nanowires with multilayer of Ni/Cu, have been fabricated by pulsed electrodeposition into nanoporous alumina membrane. The diameter of wires can be easily controlled by pore size of alumina, ranging from 30 to 100 nm. The applied potential and the duration of each potential square pulse determine the thickness of the metal layers. The nanowires have been characterized by transmission electron microscopy (TEM), magnetic force microscopy (MFM), and vibrating sample magnetometer (VSM) measurements. From the result of MFM analysis, the magnetic multilayer nanowires indicate unique magnetic property. The MFM images indicate that every ferromagnetic layer separated by Cu layer was present as single isolated domain like magnet. This technique has potential for use in the measurement and application of magnetic nanodevices.

Ion Implantation Synthesis and Characterization of Cobalt Nanodots

2003 ◽  
Vol 777 ◽  
Author(s):  
L.G. Jacobsohn ◽  
M.E. Hawley ◽  
R.M. Dickerson ◽  
D.W. Cooke ◽  
M. Nastasi
Keyword(s):  
Ion Implantation ◽  
Size Distribution ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Collective Excitation ◽  
Synthesis And Characterization ◽  
Force Microscopy ◽  
Transmission Electron ◽  
Distributed Structures

AbstractA study of the synthesis of Co nanodots by ion implantation was carried out. Silica was implanted with 35 keV Co+ ion beams with doses of 8×1015, 3×1016 and 1×1017 at/cm2 and transmission electron microscopy revealed the presence of spherical nanodots in these samples. Annealing in vacuum at 900 oC was used to change the size distribution of the nanodots. The annealed samples presented an absorption band related to the plasmon collective excitation of the metallic nanodots that redshifted for higher Co contents. The magnetic character of the samples was revealed by magnetic force microscopy measurements that showed the presence of randomly distributed structures with defined magnetization in the case of annealed samples. This work shows the feasibility of synthesizing Co nanodots with controlled size distribution.

Structural and Morphological Characterization of Ultrathin Films of an Asymmetric Polydiacetylene

1996 ◽  
Vol 440 ◽  
Author(s):  
H. C. Wang ◽  
D. W. Cheong ◽  
J. Kumar ◽  
C. Sung ◽  
S. K. Tripathy
Keyword(s):  
Second Harmonic ◽  
Morphological Characterization ◽  
Lb Films ◽  
Force Microscopy ◽  
Langmuir Blodgett ◽  
Glass Substrates ◽  
Atomic Force ◽  
Transmission Electron ◽  
Air Water Interface

AbstractA soluble, asymmetrically substituted polydiacetylene, poly(BPOD), has been reported to form stable monolayers at the air-water interface by the Langmuir-Blodgett (LB) technique [2]. Preformed polydiacetylene has been deposited onto hydrophobic substrates as multilayers to form second order nonlinear optical thin films. Second harmonic generation was found to increase with the number of layers. From previous atomic force microscopy (AFM) studies backbone orientation along the dipping direction with an interchain spacing of about 5 A° was indicated [2].The film morphology and preferential molecular orientation of these LB films are further investigated by transmission electron microscopy (TEM). A specifically tailored sample preparation method for the ultrathin LB films was used. Multilayer films were deposited on hydrophobic collodion covered glass substrates for this purpose. Electron diffraction was employed to study the crystalline organization of mono and multilayers of LB films as well as cast films.

Characterization of magnetic force microscopy probe tip remagnetization for measurements in external in-plane magnetic fields

2008 ◽  
Vol 104 (12) ◽  
pp. 123503 ◽  
Author(s):  
Tanja Weis ◽  
Ingo Krug ◽  
Dieter Engel ◽  
Arno Ehresmann ◽  
Volker Höink ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Force Microscopy

scholarly journals Detection Limits of DLS and UV-Vis Spectroscopy in Characterization of Polydisperse Nanoparticles Colloids

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Emilia Tomaszewska ◽  
Katarzyna Soliwoda ◽  
Kinga Kadziola ◽  
Beata Tkacz-Szczesna ◽  
Grzegorz Celichowski ◽  
...  
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Point Of View ◽  
Spectroscopy Analysis ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
The One

Dynamic light scattering is a method that depends on the interaction of light with particles. This method can be used for measurements of narrow particle size distributions especially in the range of 2–500 nm. Sample polydispersity can distort the results, and we could not see the real populations of particles because big particles presented in the sample can screen smaller ones. Although the theory and mathematical basics of DLS technique are already well known, little has been done to determine its limits experimentally. The size and size distribution of artificially prepared polydisperse silver nanoparticles (NPs) colloids were studied using dynamic light scattering (DLS) and ultraviolet-visible (UV-Vis) spectroscopy. Polydisperse colloids were prepared based on the mixture of chemically synthesized monodisperse colloids well characterized by atomic force microscopy (AFM), transmission electron microscopy (TEM), DLS, and UV-Vis spectroscopy. Analysis of the DLS results obtained for polydisperse colloids reveals that several percent of the volume content of bigger NPs could screen completely the presence of smaller ones. The presented results could be extremely important from nanoparticles metrology point of view and should help to understand experimental data especially for the one who works with DLS and/or UV-Vis only.

scholarly journals Local characterization of a heavy-fermion superconductor via sub-Kelvin magnetic force microscopy

2020 ◽  
Vol 117 (25) ◽  
pp. 252601
Author(s):  
Dirk Wulferding ◽  
Geunyong Kim ◽  
Hoon Kim ◽  
Ilkyu Yang ◽  
E. D. Bauer ◽  
...  
Keyword(s):  
Magnetic Force Microscopy ◽  
Heavy Fermion ◽  
Magnetic Force ◽  
Force Microscopy ◽  
Local Characterization ◽  
Heavy Fermion Superconductor

scholarly journals Magnetic force microscopy characterization of cobalt nanoparticles: A preliminary study

2020 ◽  
Author(s):  
Livia Angeloni ◽  
Daniele Passeri ◽  
Pier Giorgio Schiavi ◽  
Francesca Pagnanelli ◽  
Marco Rossi
Keyword(s):  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Cobalt Nanoparticles ◽  
Force Microscopy ◽  
Preliminary Study ◽  
Microscopy Characterization
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