scholarly journals Growth and Magnetic Properties of Polycrystalline Self-Assembled Bifurcated Co Nanowires

2008 ◽  
Vol 2008 ◽  
pp. 1-7 ◽  
Author(s):  
Jesse Silverberg ◽  
Adam L. Friedman ◽  
Latika Menon
Keyword(s):  
Magnetic Properties ◽  
Magnetic Measurements ◽  
Lattice Structure ◽  
Aluminum Foil ◽  
Porous Structures ◽  
Anodization Voltage ◽  
Alumina Template ◽  
New Material ◽  
Self Assembled ◽  
Co Nanowires

We use anodization of aluminum foil with variable applied anodization voltage to create an alumina template with bifurcated porous structures. The template is then used to electrodeposit Co, fabricating unique bifurcated Co nanowires. In order to better understand the crystal structure of our new material, we then report magnetic properties of these self-assembled bifurcated Co nanowires. Magnetic measurements of the bifurcated wires are studied as functions of branch/stem ratios, wire length, and temperature. The results are compared with those of straight Co nanowires of similar dimensions and thin film Co samples to find that a different crystal lattice structure prevails in the stems than in the branches of the wires.

Structure and magnetic properties of Fe-Co nanowires in self-assembled arrays

2002 ◽  
Vol 66 (13) ◽  
Author(s):  
Qingfeng Zhan ◽  
Ziyu Chen ◽  
Desheng Xue ◽  
Fashen Li ◽  
Henry Kunkel ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Self Assembled ◽  
Co Nanowires

Structure and magnetic properties of Co nanowires in self-assembled arrays

2004 ◽  
Vol 16 (45) ◽  
pp. 8053-8060 ◽  
Author(s):  
Fashen Li ◽  
Tao Wang ◽  
Liyuan Ren ◽  
Jianrong Sun
Keyword(s):  
Magnetic Properties ◽  
Self Assembled ◽  
Co Nanowires

Magnetic Properties of Uniform Nanowire arrays

1996 ◽  
Vol 431 ◽  
Author(s):  
P. P. Nguyen ◽  
R. J. Tonucci
Keyword(s):  
Magnetic Properties ◽  
Saturation Magnetization ◽  
Thermal Activation ◽  
Magnetic Measurements ◽  
Nanowire Arrays ◽  
Activation Model ◽  
Co Nanowires

AbstractFabrication and magnetic measurements of ferromagnetic (Ni and Co) nanowire arrays using nanochannel glass templates are presented. These nanowire arrays have novel characteristics: The nanowires are very parallel (to within a fraction of a degree) and regularly placed. They are circular with extremely uniform diameter (of less than 80 nm for some samples) both along individual wire's length and among different wires within an array. Magnetic measurements show enhanced coercivities compared to the bulk values. The saturation magnetization for Ni nanowires depends much more strongly on temperature than that for Co nanowires. The coercivities are also dependent strongly on temperature and can be explained by a thermal-activation model.

scholarly journals Magnetic properties of self-assembled Co nanowires of varying length and diameter

2000 ◽  
Vol 87 (9) ◽  
pp. 4718-4720 ◽  
Author(s):  
H. Zeng ◽  
M. Zheng ◽  
R. Skomski ◽  
D. J. Sellmyer ◽  
Y. Liu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Varying Length ◽  
Self Assembled ◽  
Co Nanowires

Photoluminescence and Magnetic Properties of Undoped and (Mn, Co) co-doped ZnO Nanoparticles

2020 ◽  
Vol 16 (4) ◽  
pp. 655-666
Author(s):  
Mona Rekaby
Keyword(s):  
Magnetic Properties ◽  
Zno Nanoparticles ◽  
Room Temperature ◽  
Magnetic Measurements ◽  
Structural Defects ◽  
Ferromagnetic Behavior ◽  
Secondary Phases ◽  
Antiferromagnetic Ordering ◽  
Doped Zno ◽  
Co Doped

Objective: The influence of Manganese (Mn2+) and Cobalt (Co2+) ions doping on the optical and magnetic properties of ZnO nanoparticles was studied. Methods: Nanoparticle samples of type ZnO, Zn0.97Mn0.03O, Zn0.96Mn0.03Co0.01O, Zn0.95Mn0.03 Co0.02O, Zn0.93Mn0.03Co0.04O, and Zn0.91Mn0.03Co0.06O were synthesized using the wet chemical coprecipitation method. Results: X-ray powder diffraction (XRD) patterns revealed that the prepared samples exhibited a single phase of hexagonal wurtzite structure without any existence of secondary phases. Transmission electron microscope (TEM) images clarified that Co doping at high concentrations has the ability to alter the morphologies of the samples from spherical shaped nanoparticles (NPS) to nanorods (NRs) shaped particles. The different vibrational modes of the prepared samples were analyzed through Fourier transform infrared (FTIR) measurements. The optical characteristics and structural defects of the samples were studied through Photoluminescence (PL) spectroscopy. PL results clarified that Mn2+ and Co2+ doping quenched the recombination of electron-hole pairs and enhanced the number of point defects relative to the undoped ZnO sample. Magnetic measurements were carried out at room temperature using a vibrating sample magnetometer (VSM). (Mn, Co) co-doped ZnO samples exhibited a ferromagnetic behavior coupled with paramagnetic and weak diamagnetic contributions. Conclusion: Mn2+ and Co2+ doping enhanced the room temperature Ferromagnetic (RTFM) behavior of ZnO. In addition, the signature for antiferromagnetic ordering between the Co ions was revealed. Moreover, a strong correlation between the magnetic and optical behavior of the (Mn, Co) co-doped ZnO was analyzed.

scholarly journals A Dy(III) Fluorescent Single-Molecule Magnet Based on a Rhodamine 6G Ligand

Inorganics ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 51
Author(s):  
Lin Miao ◽  
Mei-Jiao Liu ◽  
Man-Man Ding ◽  
Yi-Quan Zhang ◽  
Hui-Zhong Kou
Keyword(s):  
Magnetic Properties ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Rhodamine 6G ◽  
Bond Angle ◽  
Magnetic Measurements ◽  
Single Molecule Magnet ◽  
Lanthanide Metals ◽  
Process Studies ◽  
Dual Functions

The complexes of lanthanide metals, especially dysprosium, can generally exhibit excellent magnetic properties. By means of modifying ligands, dual functions or even multi-functions can be achieved. Here, we synthesized an eight-coordinate Dy(III) complex 1, [Dy(HL-o)2(MeOH)2](ClO4)3·4.5MeOH, which is single-molecule magnet (SMM), and the introduction of the rhodamine 6G chromophore in the ring-opened ligand HL-o realizes ligand-centered fluorescence in addition to SMM. Magnetic measurements and ab initio calculations indicate that the magnetic relaxation for complex 1 should be due to the Raman relaxation process. Studies on magneto-structural correlationship of the rhodamine salicylaldehyde hydrazone Dy(III) complexes show that the calculated energy of the first Kramers Doublet (EKD1) is basically related to the Ophenoxy-Dy-Ophenoxy bond angle, i.e., the larger Ophenoxy-Dy-Ophenoxy bond angle corresponds to a larger EKD1.

Influence of local lattice structure on magnetic properties in Y2Fe17 compounds

2020 ◽  
Vol 4 (11) ◽  
Author(s):  
Jun-ichiro Inoue ◽  
Takuya Yoshioka ◽  
Hiroki Tsuchiura
Keyword(s):  
Magnetic Properties ◽  
Lattice Structure ◽  
Local Lattice

Structure and magnetic properties of Fe1−xCox nanowires in self-assembled arrays

2009 ◽  
Vol 54 (26) ◽  
pp. 6543-6547 ◽  
Author(s):  
G.H. Yue ◽  
X. Wang ◽  
L.S. Wang ◽  
P. Chang ◽  
R.T. Wen ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Self Assembled

scholarly journals Influence of the centrosome on the structure of nucleated microtubules.

1985 ◽  
Vol 100 (4) ◽  
pp. 1185-1191 ◽  
Author(s):  
L Evans ◽  
T Mitchison ◽  
M Kirschner
Keyword(s):  
Lattice Structure ◽  
Neuroblastoma Cells ◽  
Nucleation Sites ◽  
Self Assembled ◽  
Brain Microtubules

The capacity of the centrosome to influence the lattice structure of nucleated microtubules was studied in vitro. Brain microtubules self-assembled to give predominantly (98%) 14-protofilament microtubules. However, under exactly the same conditions of assembly they grew off of purified centrosomes from neuroblastoma cells to give mostly (82%) 13-protofilament microtubules. Thus, the nucleation sites on the centrosome constrained the microtubule lattice to yield the number of protofilaments usually found in vivo.

Self-Assembled Fibers Containing Stable Organic Radical Moieties: Alignment and Magnetic Properties in Liquid Crystals

2016 ◽  
Vol 22 (26) ◽  
pp. 8872-8878 ◽  
Author(s):  
Hiroki Eimura ◽  
Yoshikazu Umeta ◽  
Hiroko Tokoro ◽  
Masafumi Yoshio ◽  
Shin-ichi Ohkoshi ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Liquid Crystals ◽  
Organic Radical ◽  
Self Assembled
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