نتایج جستجو برای: magnetic nanowire

تعداد نتایج: 347198  

Journal: :Nano letters 2008
Ke Xu James R Heath

The preparation and electrical properties of high-temperature superconductor nanowire arrays are reported for the first time. YBa2Cu3O(7-delta) nanowires with widths as small as 10 nm (much smaller than the magnetic penetration depth) and lengths up to 200 microm are studied by four-point electrical measurements. All nanowires exhibit a superconducting transition above liquid nitrogen temperatu...

Journal: :Nanoscale 2015
Oleksandr Trotsenko Alexander Tokarev Alexey Gruzd Timothy Enright Sergiy Minko

Magnetic field assisted assembly is used to fabricate aligned single nanowire mesh-like nanostructured films. Inhomogeneous magnetic field is applied to translocate high aspect ratio silver nanowires from suspensions to the surface of solid supports. The tangential component of the magnetic field vector is rotated in two consecutive steps to arrange the rectangular mesh-like structure of orthog...

Journal: :Scientific reports 2016
Fabian Haas Tobias Wenz Patrick Zellekens Nataliya Demarina Torsten Rieger Mihail Lepsa Detlev Grützmacher Hans Lüth Thomas Schäpers

We study the impact of the direction of magnetic flux on the electron motion in GaAs/InAs core/shell nanowires. At small tilt angles, when the magnetic field is aligned nearly parallel to the nanowire axis, we observe Aharonov-Bohm type h/e flux periodic magnetoconductance oscillations. These are attributed to transport via angular momentum states, formed by electron waves within the InAs shell...

In this work, magnetic Ni nanowire arrays were ac-pulse electrodeposited into the anodic aluminum oxide (AAO) template fabricated by the common two-step anodization technique. The barrier layers at the  bottom of the pores were exponentially thinned in a non-equilibrium anodization process to 8, 12, 16 and 20 V. These were fabricated using the constant of 15 mA deposition current, 48 mS off-tim...

روح ا... گلی پور, , عبدالعلی رمضانی, , علی خیاطیان, , محمد الماسی کاشی, ,

  Co and Ni magnetic nanowires with different diameter and deposition time were fabricated into the alumina template using ac electrodeposition. For Ni nanowires with 30 nm diameter the coercivity initially increased then dropped with deposition time, while it only increased with deposition time for all the other diameters. In general, the results showed that the coercivity reduced with diamete...

2006
Xiaoxu Liu Jianling Zhao Yangxian Li Shifeng Xu Zhiyong Zhu Jinglan Chen Guangheng Wu

A series of Co1 xCux (x 1⁄4 0:05{0:70) composite nanowire arrays have been electrodeposited in alumina templates. An apparent pH value rule for nanowire phase and composition has been found. Based on it, composite nanowires can be obtained and the composition becomes more controllable. In the composite nanowires, the cubic and hexagonal structures coexisted. The specific magnetic properties, co...

Journal: :Optics express 2010
Rongkuo Zhao Philippe Tassin Thomas Koschny Costas M Soukoulis

We study the optical force arising when isolated gold nanowire pairs and metamaterials with a gold nanowire pair in the unit cell are illuminated with laser radiation. Firstly, we show that isolated nanowire pairs are subject to much stronger optical forces than nanospheres due to their stronger electric and magnetic dipole resonances. We also investigate the properties of the optical force as ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه کاشان - دانشکده علوم 1384

در دهه اخیر تحقیقات زیادی در زمینه ساخت نانو سیم های مغناطیسی به روش های مختلف و کاربرد آن ها برای ساخت حافظه های مغناطیسی صورت گرفته و همچنین بررسی تاثیر شرایط ساخت و پارامترهای هندسی نانوسیم ها بر خواص مغناطیسی آن ها مورد توجه بوده است. یکی از روش های ساخت نانو سیم های مغناطیسی استفاده از قالب های حفره دار آلومینا و پر نمودن آن ها به روش الکتروشیمی می باشد. در متن حاضر نتایج فعالیت های انجا...

Journal: :Nature communications 2014
Zheng Duan Andrew Smith Liu Yang Brian Youngblood Jürgen Lindner Vladislav E Demidov Sergej O Demokritov Ilya N Krivorotov

Spin torque from spin current applied to a nanoscale region of a ferromagnet can act as negative magnetic damping and thereby excite self-oscillations of its magnetization. In contrast, spin torque uniformly applied to the magnetization of an extended ferromagnetic film does not generate self-oscillatory magnetic dynamics but leads to reduction of the saturation magnetization. Here we report st...

2016
Fengjun Zhuo Z. Z. Sun

Field-driven domain wall (DW) motion in ferromagnetic nanowires with easy- and hard-axis anisotropies was studied theoretically and numerically in the presence of the bulk Dzyaloshinskii-Moriya interaction (DMI) based on the Landau-Lifshitz-Gilbert equation. We propose a new trial function and offer an exact solution for DW motion along a uniaxial nanowire driven by an external magnetic field. ...

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