نتایج جستجو برای: coercivity force

تعداد نتایج: 190083  

Journal: :journal of nanostructures 2013
m. almasi kashi a. ramazani v. asgari e. jafari- khamse

the effect of length variation on the magnetic properties of nife alloy nanowires electrodeposited into the alumina template was investigated. the diameter (45±2.5 nm) and length (~ 1.9, 7.12, 8.3, 9.5 and 13.3 µm) of the nanowires were estimated from scanning electron microscopy images. energy dispersive spectroscopy results showed ni3fe7 composition of the alloy nanowires.  the magnetic prope...

Journal: :Journal of Alloys and Compounds 2021

The process of the nucleation and evolution ferromagnetic phase in thin Fe49Rh51 film on a MgO substrate near transition from antiferromagnetic (AFM) to (FM) state was comprehensively characterized by means measurements temperature, time magnetic field dependences magnetization. observed relaxation processes magnetization indicate FM surface its further growth towards film-substrate interface u...

Journal: :journal of nanostructures 0
kambiz hedayati department of science, arak university of technology, arak, iran mojtaba goodarzi department of science, arak university of technology, arak, iran davood ghanbari young researchers and elite club, arak branch, islamic azad university, arak, iran

fe3o4 nanostructures were synthesized via a facile hydrothermal reaction. the effect of various surfactants such as cationic and anionic on the morphology of the product was investigated. magnetic nanoparticles were added to poly styrene (ps) for preparation of magnetic nanocomposite. nanostructures were then characterized using x-ray diffraction (xrd), scanning electron microscopy (sem) and fo...

2009
G. DAL I. FONSECA G. LEONI

In this paper it is shown that, when there is lack of coercivity with respect to some partial derivatives on the underlying field u , then the relaxation of the functional

2017
Gisella Croce Philippe Lebon

In this paper we study a Dirichlet problem for an elliptic equation with degenerate coercivity and a singular lower order term with natural growth with respect to the gradient. The model problem is

In this study, the improvement of the magnetic properties of Co2FeSi Heusler compound was followed by the utilization of different experimental synthesizing procedures. Comparing the crystal structure showed that the milled samples had a higher crystalline order than the arc-melted ones. Annealing of the milled sample improved the crystalline order, resulting in the highest saturation magnetiza...

2004
G. P. Zhao H. S. Lim Y. P. Feng C. K. Ong

We present our simulated initial magnetization curves for nanostructured permanent magnets based on a simple hybrid model. The model assumes that the reversible change in the magnetization curves obeys the Stoner–Wohlfarth (SW) model while the irreversible part can be attributed to the motion of the transition region (TR), which is a domainwall-like magnetic moment distribution formed in the gr...

Journal: :Scientific reports 2015
Houfang Liu Ran Wang Peng Guo Zhenchao Wen Jiafeng Feng Hongxiang Wei Xiufeng Han Yang Ji Shufeng Zhang

Magnetization switching between parallel and antiparallel alignments of two magnetic layers in magnetic tunnel junctions (MTJs) is conventionally controlled either by an external magnetic field or by an electric current. Here, we report that the manipulation of magnetization switching and tunnel magnetoresistance (TMR) in perpendicularly magnetized CoFeB/MgO/CoFeB MTJs can be achieved by both t...

Journal: :journal of nanostructures 2015
m. ahmadzadeh m. almasi-kashi

cofecu nanowires were deposited by pulsed electrodeposition technique into the porous alumina templates by a two-step mild anodization technique, using the single-bath method. the electrodeposition was performed in a constant electrolyte while cu constant was controlled by electrodeposition current. the electrodeposition current was 3.5, 4.25, 5 and 6 ma. the effect of electrodeposition current...

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