Voltage Manipulation of Desired Magnetization Orientation in Multiferroic Nanomagnets

2020 ◽  
Author(s):  
Jiahao Liu ◽  
Xiaokuo Yang ◽  
Dunhua Hong ◽  
Cheng Li ◽  
Nuo Xu ◽  
...  
Keyword(s):  
Magnetization Orientation

scholarly journals Stability of Bar Code Information Stored in Magnetic Nanowire Arrays

2017 ◽  
Vol 2017 ◽  
pp. 1-8
Author(s):  
Eduardo Cisternas ◽  
Eugenio E. Vogel ◽  
Julián Faúndez
Keyword(s):  
Magnetic Material ◽  
Triangular Lattice ◽  
Porous Alumina ◽  
Nanowire Arrays ◽  
Bar Code ◽  
Bar Codes ◽  
Repulsive Energy ◽  
Magnetic Nanowire ◽  
Magnetization Orientation ◽  
Stored Information

Firmware applications such as security codes, magnetic keys, and similar products can be stored in magnetic bar codes similar to optical bar codes. This can be achieved on the triangular lattice present in porous alumina, whose pori can be filled by magnetic material, over which magnetic bar codes can be inscribed. We study the conditions to improve the durability of the stored information by minimizing the repulsive energy among wires with parallel magnetization within the same bar but interacting with attractive energy with wires in the neighboring bar. The following parameters are varied to minimize the energy of the system: relative amount of magnetization orientation within the bar code area in any orientation, width of the bars, and distribution of wider bars to the outside or to the inside of the code. It is found that durability of the code is favored for equal amount of magnetization in each direction, abundance of narrow bars trying to locate a few wider ones towards the center. Three real commercial optical bar codes taken at random were mapped into magnetic bar codes; it is found that the corresponding magnetic energies are similar to those analyzed here which provides a realistic test for this approach.

Synthesis and Characterization of BiFeO3 Ceramic by Simple and Novel Methods

2016 ◽  
Vol 35 (6) ◽  
pp. 551-557 ◽  
Author(s):  
Omid Amiri ◽  
Mohammad Reza Mozdianfar ◽  
Mahmoud Vahid ◽  
Masoud Salavati-Niasari ◽  
Sousan Gholamrezaei
Keyword(s):  
Magnetic Properties ◽  
Domain Walls ◽  
Magnetic Domain ◽  
X Ray Diffraction ◽  
X Ray ◽  
Size Dependent ◽  
Magnetic Domain Walls ◽  
Magnetization Orientation ◽  
Thermal Stability Of

AbstractBiFeO3 nanopowders with new morphology have been synthesized by different methods. X-ray diffraction analysis, scanning electron microscopy, Fourier transform infrared and vibrating sample magnetometer were carried out at room temperature to study the structural and magnetic properties of as-synthesized products. VSM was utilized to measure the size-dependent magnetic behaviors of the as-prepared nanoparticles. Results show that the method has strong effect on the purity of the products. BFO synthesized by third method was pure. Crystallite size has a great effect on the magnetic properties. According to these results the nanoparticle diameter is smaller than the critical single-domain diameter, avoiding the configuration of magnetic domain walls decreases the magnetization. Even though the diameter of particle becomes even smaller, the thermal stability of the magnetization orientation decreases.

Laser-Induced Magnetization Dynamics of GdFeCo Film Probing by Time Resolved Magneto-Optic Kerr Effect

SPIN ◽  
2015 ◽  
Vol 05 (04) ◽  
pp. 1540014 ◽  
Author(s):  
Wei He ◽  
Hong-Ye Wu ◽  
Jian-Wang Cai ◽  
Yao-Wen Liu ◽  
Zhao-Hua Cheng
Keyword(s):  
Diffusion Coefficient ◽  
Kerr Effect ◽  
Recovery Process ◽  
Optical Effect ◽  
Magnetization Dynamics ◽  
Time Resolved ◽  
Thermal Diffusion Coefficient ◽  
Magneto Optical Effect ◽  
Magnetization Orientation ◽  
Magnetization Precession

Laser-induced magnetization dynamics in Gd[Formula: see text]Fe[Formula: see text]Co[Formula: see text] (GdFeCo) film was investigated by time-resolved magneto-optical effect. After an ultrafast demagnetization and a magnetization recovery process, a second slower drop from several picoseconds (ps) to 200[Formula: see text]ps was observed. Previous report explained it as the demagnetization of Gd sublattice. However, when timescale extended up to 5 nanosecond (ns), we identified it as the part of an oscillated magnetization precession. It presents the change of magnetization orientation rather than the change of magnetization amplitude. Our results reveal that the low thermal diffusion coefficient of GdFeCo film plays an important role in the laser-induced magnetization dynamics of GdFeCo film.

The magnetization orientation of Fe ultrathin layers in contact with graphene

2016 ◽  
Vol 18 (48) ◽  
pp. 33233-33239 ◽  
Author(s):  
Mattia Cattelan ◽  
Igor Píš ◽  
Silvia Nappini ◽  
Elena Magnano ◽  
Federica Bondino ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Ultrathin Films ◽  
Photoelectron Spectroscopy ◽  
Magnetic Circular Dichroism ◽  
Chemical Properties ◽  
X Ray ◽  
Ultrathin Layers ◽  
Magnetization Orientation ◽  
Circular Dichroïsm ◽  
And Chemical Properties

In this paper, we study the magnetic and chemical properties of Fe/graphene vertically stacked ultrathin films by means of X-ray magnetic circular dichroism and X-ray photoelectron spectroscopy.

Effect of substrate symmetry on the preferred magnetization orientation of Ni films on Cu

1995 ◽  
Vol 13 (3) ◽  
pp. 1497-1500 ◽  
Author(s):  
S. Z. Wu ◽  
G. J. Mankey ◽  
R. F. Willis
Keyword(s):  
Magnetization Orientation

scholarly journals Machine‐Learning‐Enabled Vectorial Opto‐Magnetization Orientation

2021 ◽  
pp. 2100287
Author(s):  
Weichao Yan ◽  
Zhongquan Nie ◽  
Xunwen Zeng ◽  
Guohong Dai ◽  
Mengqiang Cai ◽  
...  
Keyword(s):  
Machine Learning ◽  
Magnetization Orientation

Piezo-voltage control of magnetization orientation in a ferromagnetic semiconductor

2008 ◽  
Vol 2 (3) ◽  
pp. 96-98 ◽  
Author(s):  
S. T. B. Goennenwein ◽  
M. Althammer ◽  
C. Bihler ◽  
A. Brandlmaier ◽  
S. Geprägs ◽  
...  
Keyword(s):  
Voltage Control ◽  
Ferromagnetic Semiconductor ◽  
Magnetization Orientation
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