Effect of film thickness on soft magnetic behavior of Fe2CoSi Heusler alloy for spin transfer torque device applications

2018 ◽  
Author(s):  
V. Asvini ◽  
G. Saravanan ◽  
R. K. Kalaiezhily ◽  
M. Manivel Raja ◽  
K. Ravichandran
Keyword(s):  
Film Thickness ◽  
Heusler Alloy ◽  
Magnetic Behavior ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Soft Magnetic ◽  
Device Applications

Exchange-spring like magnetic behavior of the tetragonal Heusler compound Mn2FeGa as a candidate for spin-transfer torque

2013 ◽  
Vol 102 (20) ◽  
pp. 202402 ◽  
Author(s):  
Teuta Gasi ◽  
Ajaya K. Nayak ◽  
Jürgen Winterlik ◽  
Vadim Ksenofontov ◽  
Peter Adler ◽  
...  
Keyword(s):  
Magnetic Behavior ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Heusler Compound ◽  
Exchange Spring

scholarly journals Bias dependence of spin transfer torque in Co2MnSi Heusler alloy based magnetic tunnel junctions

2017 ◽  
Vol 110 (17) ◽  
pp. 172403 ◽  
Author(s):  
Jie Zhang ◽  
Timothy Phung ◽  
Aakash Pushp ◽  
Yari Ferrante ◽  
Jaewoo Jeong ◽  
...  
Keyword(s):  
Heusler Alloy ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Spin Transfer Torque ◽  
Spin Transfer

POLYCRYSTALLINE CO-BASED FULL-HEUSLER-ALLOY FILMS FOR SPINTRONIC DEVICES

SPIN ◽  
2014 ◽  
Vol 04 (04) ◽  
pp. 1440021 ◽  
Author(s):  
A. HIROHATA ◽  
J. SAGAR ◽  
L. R. FLEET ◽  
H. ENDO
Keyword(s):  
Heusler Alloy ◽  
Magnetic Behavior ◽  
Epitaxial Films ◽  
Next Generation ◽  
Alloy Films ◽  
Spintronic Devices ◽  
Low Temperature Annealing ◽  
Order Of Magnitude ◽  
Device Applications ◽  
Full Heusler

For the implementation of Heusler-alloy films into next-generation magnetic memories and storages, the optimization of their polycrystalline nature is critical. In this review, we identify two key parameters for the optimization; grain volume for interfacial magnetism and activation volume for magnetic dynamics. We establish correlations between these structural and magnetic volumes and magnetic behavior and then optimize these properties. The optimized polycrystalline films possess exchange bias of 250 Oe induced by low-temperature annealing (400°C for 30 min.), which is induced by the grain volume matching between the Heusler-alloy and antiferromagnetic layers. Despite the matching size measuring 7–8 nm in diameter, the magnetic activation volumes are estimated to be almost 80 nm which is one order of magnitude greater than that for epitaxial films. These values satisfy the requirements for next-generation spintronic device applications and unambiguously prove the great potential of the polycrystalline Heusler-alloy films for future spintronic applications.

scholarly journals Angular Dependence of Spin Transfer Switching in Spin Valve Nanopillar Based Heusler Alloy

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Pirat Khunkitti ◽  
Anan Kruesubthaworn ◽  
Arkom Kaewrawang ◽  
Tim Mewes ◽  
Claudia K. A. Mewes ◽  
...  
Keyword(s):  
Heusler Alloy ◽  
Spin Valve ◽  
Random Access ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Switching Behavior ◽  
Magnetization Switching ◽  
Low Frequencies ◽  
Power Spectral ◽  
High Density Recording

The spin transfer induced magnetization switching in current perpendicular-to-the-plane spin valve nanopillar based Co2FeAl0.5Si0.5Heusler alloy with varying the initial angles of the magnetization of sensing layer,θ0, was investigated via macrospin simulations. The effects of an in-plane magnetic field,Hi, on the switching behavior were also evaluated. The magnetization switching was excited by spin polarized switching current,Is. The time varying magnetization was computed by the Landau-Lifshitz-Gilbert-Slonczewski equation, while the spin transfer induced noise was examined by using the power spectral density analysis. It was found thatθ0should be narrowly initialized since this configuration produces the small noise during the switching. Also, the negativeIsproduced more uniform switching than the positiveIsdue to existence of ferromagnetic exchange coupling. WhenHiwas presented, the noise generated at low frequencies could be suppressed, and then the switching behavior became more uniform. In addition, the results indicated that the noise configuration could be explained by the physical dynamic of magnetization behavior. Hence, the spin transfer induced noise needs to be minimized in order to improve the performance of spin transfer torque random access memory for high density recording.

scholarly journals Spin-transfer-torque mediated quantum magnetotransport in MoS2/phosphorene vdW heterostructure based MTJs

2020 ◽  
Vol 22 (34) ◽  
pp. 19139-19146
Author(s):  
Sushant Kumar Behera ◽  
Pritam Deb
Keyword(s):  
Van Der Waals ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Van Der Waals Heterostructures ◽  
Magnetization Density ◽  
Device Applications ◽  
Vdw Heterostructure

Spin-transfer-torque mediated quantum magnetotransport behaviour can be realized via magnetization density switching in 2D van der Waals heterostructures for device applications.

Introduction of spin torques

2017 ◽  
Author(s):  
T. Kimura
Keyword(s):  
Angular Momentum ◽  
Giant Magnetoresistance ◽  
Spontaneous Magnetization ◽  
Magnetic Domain ◽  
Magnetic Multilayers ◽  
Transfer Effect ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Spin Angular Momentum ◽  
Spin Torques

This chapter discusses the spin-transfer effect, which is described as the transfer of the spin angular momentum between the conduction electrons and the magnetization of the ferromagnet that occurs due to the conservation of the spin angular momentum. L. Berger, who introduced the concept in 1984, considered the exchange interaction between the conduction electron and the localized magnetic moment, and predicted that a magnetic domain wall can be moved by flowing the spin current. The spin-transfer effect was brought into the limelight by the progress in microfabrication techniques and the discovery of the giant magnetoresistance effect in magnetic multilayers. Berger, at the same time, separately studied the spin-transfer torque in a system similar to Slonczewski’s magnetic multilayered system and predicted spontaneous magnetization precession.

Sign in / Sign up

Export Citation Format

Share Document