Pseudo spin-valve structures with Co/Ti as soft magnetic layer

2003 ◽  
Vol 196 (1) ◽  
pp. 56-59 ◽  
Author(s):  
M. Schmidt ◽  
F. Stobiecki ◽  
B. Szymański
Keyword(s):  
Spin Valve ◽  
Magnetic Layer ◽  
Soft Magnetic

Influence of a helical anisotropy profile on the static and dynamic properties of a soft magnetic layer

2012 ◽  
Vol 85 (9) ◽  
Author(s):  
M. Gloanec ◽  
S. Dubourg ◽  
O. Acher ◽  
F. Duverger ◽  
D. Plessis ◽  
...  
Keyword(s):  
Dynamic Properties ◽  
Magnetic Layer ◽  
Soft Magnetic ◽  
Helical Anisotropy

Magnetic Field Enhancement with Soft Magnetic Flux Guides

2008 ◽  
Vol 587-588 ◽  
pp. 313-317
Author(s):  
D.C. Leitão ◽  
I.G. Trindade ◽  
R. Fermento ◽  
João P. Araújo ◽  
S. Cardoso ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Spin Valve ◽  
Field Enhancement ◽  
High Permeability ◽  
Soft Magnetic ◽  
Field Amplification ◽  
Close Proximity ◽  
Magnetic Field Enhancement ◽  
The Magnetic Field

In this work, a study of the sensitivity enhancement of spin valve sensors, when located in close proximity to magnetic flux guides, is presented. The magnetoresistance (MR) of spin-valve sensors, lithographically patterned into stripes with lateral dimensions, (length) l = 500 µm, (width) wsensor = 1, 2, 6 µm and placed near one/two Co93.5Zr2.8Nb3.7 (CZN) magnetic flux guide, is characterized at room temperature. CZN has a high permeability that together with a defined microstructured shape, is able to concentrate the magnetic flux in a small area, leading to an increase in sensor's sensitivity. The magnetic field amplification is estimated by comparison of sensor sensitivity with/without magnetic flux guides, in the linear operation range, and studied as a function of different parameters. Besides an enhancement in sensitivity, sensors also exhibit an important increase in the hard axis coercivity and a shift from MR(H=0) = 0.5, both attributed to the magnetic flux guides. Amplification factors of the order of 20 are observed..

Interfacial Contributions to Magnetostriction of Ferromagnetic Layers for Magnetoresistive Sensors

2002 ◽  
Vol 721 ◽  
Author(s):  
E.W. Singleton ◽  
K.J. Duxstad
Keyword(s):  
Layer Thickness ◽  
Spin Valve ◽  
Magnetic Layer ◽  
Experimental Results ◽  
Ferromagnetic Layers ◽  
Magnetoresistive Sensors

AbstractWe have experimentally measured magnetostriction of thin CoFe layers when deposited with various seed and capping layers. Seed and capping layers were chosen to be materials that may be used in spin-valve (SV) type structures. Materials deposited adjacent to the magnetic layer include Cu, Ta and TaN. The experimental results are interpreted using a model that allows separation of bulk and interface contributions to the measured magnetostriction [1].Results show a clear interfacial contribution that is dependent upon the material at the interface of the magnetic layer. The results demonstrate that surface contributions to the magnetostriction dominate as layer thickness decreases.

scholarly journals Взаимодействие ферромагнитных слоев через магнитную перемычку

2019 ◽  
Vol 61 (9) ◽  
pp. 1649
Author(s):  
И.Ю. Пашенькин ◽  
Р.В. Горев ◽  
А.А. Фраерман
Keyword(s):  
Domain Wall ◽  
Exchange Interaction ◽  
Magnetization Curve ◽  
Magnetic Layer ◽  
Geometric Parameters ◽  
Soft Magnetic ◽  
Hard Layer ◽  
Ferromagnetic Films ◽  
Micromagnetic Modeling

Using the methods of micromagnetic modeling, the dependence of the structure and energy of a domain wall localized in the magnetic bridge between ferromagnetic films on the geometric parameters of the system has been investigated. The effect of displacement and change in the shape of the magnetization curve of the soft magnetic layer caused by the exchange interaction with the magnetic hard layer through a magnetic filament has been demonstrated.

Pseudo spin-valve structures with NiO/Co as a hard magnetic layer

2004 ◽  
Vol 241 (7) ◽  
pp. 1613-1616
Author(s):  
J. Dubowik ◽  
F. Stobiecki ◽  
B. Szymański ◽  
I. Gościańska ◽  
K. Röll ◽  
...  
Keyword(s):  
Spin Valve ◽  
Magnetic Layer

scholarly journals Влияние магнитомягкой фазы на процессы перемагничивания магнитотвердого/магнитомягкого бислоя

2020 ◽  
Vol 62 (6) ◽  
pp. 846
Author(s):  
Т.А. Тааев ◽  
К.Ш. Хизриев ◽  
А.К. Муртазаев
Keyword(s):  
Magnetic Field ◽  
Monte Carlo ◽  
Monte Carlo Method ◽  
External Magnetic Field ◽  
Exchange Interaction ◽  
Magnetization Reversal ◽  
Magnetic Layer ◽  
Anisotropy Constant ◽  
Soft Magnetic ◽  
The Monte Carlo Method

Investigation of the magnetization reversal of a hard/soft magnetic bilayer in an external magnetic field was performed by the Monte Carlo method. The magnetization reversal curves of the magnetic bilayer are plotted for various values of the thickness of the soft magnetic layer. Also the effect of the intralayer exchange interaction and the anisotropy constant on the magnetization reversal processes was studied. The phase diagrams of the magnetic bilayer are plotted.

DEPENDENCE OF GIANT MAGNETORESISTANCE ON THE THICKNESS OF MAGNETIC AND NON-MAGNETIC LAYERS IN DUAL SPIN VALVES

2004 ◽  
Vol 18 (09) ◽  
pp. 355-365 ◽  
Author(s):  
YONG WANG ◽  
MING XU ◽  
ZHENHONG MAI
Keyword(s):  
Giant Magnetoresistance ◽  
Classical Model ◽  
Spin Valve ◽  
Magnetic Layer ◽  
Spin Valves ◽  
Experimental Result ◽  
Magnetic Layers ◽  
Ferromagnetic Layers ◽  
Hole Effect ◽  
Good Agreement

Based on the previous semi-classical model, we have performed calculation of the giant magnetoresistance (GMR) as a function of the thickness of the top/bottom or center ferromagnetic layers and the non-magnetic layer in dual spin valves. Our results are in good agreement with that reported in experiment, i.e., a GMR maximum is observed when the thickness of the top/bottom magnetic layer is at 20 ~ 40 Å; the GMR value decreases monotonically with the increase of the non-magnetic layer thickness. By considering the "pin-hole" effect, the variation of GMR versus the thickness of the center magnetic layer is also found to be consistent with the experimental result. These calculations will be helpful in the design of high-quality spin-valve structures.

scholarly journals Magnetic Recording of Superconducting States

Metals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1022 ◽  
Author(s):  
Gorky Shaw ◽  
Sylvain Blanco Blanco Alvarez ◽  
Jérémy Brisbois ◽  
Loïc Burger ◽  
Lincoln B. L. G. Pinheiro ◽  
...  
Keyword(s):  
Magnetic Recording ◽  
Magnetic Layer ◽  
Ex Situ ◽  
Soft Magnetic ◽  
Superconducting Layer ◽  
Hard Drives ◽  
Binary Information ◽  
Drawing Board ◽  
Local Polarization ◽  
Compelling Experimental Evidence

Local polarization of magnetic materials has become a well-known and widely used method for storing binary information. Numerous applications in our daily life such as credit cards, computer hard drives, and the popular magnetic drawing board toy, rely on this principle. In this work, we review the recent advances on the magnetic recording of inhomogeneous magnetic landscapes produced by superconducting films. We summarize the current compelling experimental evidence showing that magnetic recording can be applied for imprinting in a soft magnetic layer the flux trajectory taking place in a superconducting layer at cryogenic temperatures. This approach enables the ex situ observation at room temperature of the imprinted magnetic flux landscape obtained below the critical temperature of the superconducting state. The undeniable appeal of the proposed technique lies in its simplicity and the potential to improve the spatial resolution, possibly down to the scale of a few vortices.

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