Influence of the Thickness of Nonmagnetic Spacer on the Magnetic Properties of Fe/Cu Multilayered Nanowires

2018 ◽  
Vol 787 ◽  
pp. 93-98
Author(s):  
Xi Zhi Wang ◽  
Liang Cai Ma ◽  
Ling Ma ◽  
Xue Ling Lin
Keyword(s):  
Magnetic Properties ◽  
Equilibrium Structure ◽  
Systematic Investigation ◽  
Structure Stability ◽  
Interlayer Exchange Coupling ◽  
One Dimensional ◽  
The Stability ◽  
Interlayer Exchange ◽  
Multilayered Nanowires ◽  
Nonmagnetic Spacer

We present a systematic investigation on the equilibrium structure, stability and magnetic properties of one-dimensional Fe/Cu multilayered nanowires with different width of nonmagnetic Cu spacer using first-principles calculations. The multilayered nanowires preserve their FCC (001) directional lattice symmetry after structural optimization. It is found that the stability of Fe/Cu multilayered nanowires decreases with increasing concentration of nonmagnetic Cu layers. The calculated interlayer exchange coupling (IEC) is found to switch signs as the thickness of nonmagnetic Cu spacer increases in the nanowire, and the magnitude of the IEC value is found to decrease significantly with increasing the number of nonmagnetic Cu layers.

Magnetooptical and magnetic properties of Fe/ZnTe/Fe nanoheterostructures: Manifestation of interlayer exchange coupling

2006 ◽  
Vol 102 (2) ◽  
pp. 149-156 ◽  
Author(s):  
I. D. Lobov ◽  
V. M. Maevskii ◽  
M. M. Kirillova ◽  
A. V. Korolev ◽  
F. A. Pudonin
Keyword(s):  
Magnetic Properties ◽  
Exchange Coupling ◽  
Interlayer Exchange Coupling ◽  
Interlayer Exchange

scholarly journals Magnetic properties, interlayer exchange coupling and electric transport in Fe/Cr/Fe trilayers

2002 ◽  
Vol 82 (1) ◽  
pp. 85-104 ◽  
Author(s):  
A. Vernes ◽  
P. Weinberger ◽  
C. Blaas ◽  
P. Mohn ◽  
L. Szunyogh ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Exchange Coupling ◽  
Electric Transport ◽  
Interlayer Exchange Coupling ◽  
Interlayer Exchange

scholarly journals High Temperature Magnetic Properties of Indirect Exchange Spring FePt/M(Cu,C)/Fe Trilayer Thin Films

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Anabil Gayen ◽  
Barnali Biswas ◽  
Akhilesh Kumar Singh ◽  
Padmanapan Saravanan ◽  
Alagarsamy Perumal
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
High Temperature ◽  
Exchange Coupling ◽  
High Performance ◽  
Interlayer Exchange Coupling ◽  
Magnetic Studies ◽  
Different Temperatures ◽  
Interlayer Exchange ◽  
Hard Magnetic Properties

We report the investigation of temperature dependent magnetic properties of FePt and FePt(30)/M(Cu,C)/Fe(5) trilayer thin films prepared by using magnetron sputtering technique at ambient temperature and postannealed at different temperatures.L10ordering, hard magnetic properties, and thermal stability of FePt films are improved with increasing postannealing temperature. In FePt/M/Fe trilayer, the formation of interlayer exchange coupling between magnetic layers depends on interlayer materials and interface morphology. In FePt/C/Fe trilayer, when the C interlayer thickness was about 0.5 nm, a strong interlayer exchange coupling between hard and soft layers was achieved, and saturation magnetization was enhanced considerably after using interlayer exchange coupling with Fe. In addition, incoherent magnetization reversal process observed in FePt/Fe films changes into coherent switching process in FePt/C/Fe films giving rise to a single hysteresis loop. High temperature magnetic studies up to 573 K reveal that the effective reduction in the coercivity decreases largely from 34 Oe/K for FePt/Fe film to 13 Oe/K for FePt/C(0.5)/Fe film demonstrating that the interlayer exchange coupling seems to be a promising approach to improve the stability of hard magnetic properties at high temperatures, which is suitable for high-performance magnets and thermally assisted magnetic recording media.

scholarly journals Readable High-Speed Racetrack Memory Based on an Antiferromagnetically Coupled Soft/Hard Magnetic Bilayer

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1538 ◽  
Author(s):  
Ziyang Yu ◽  
Chenhuinan Wei ◽  
Fan Yi ◽  
Rui Xiong
Keyword(s):  
Exchange Coupling ◽  
High Speed ◽  
Uniaxial Anisotropy ◽  
Schmitt Trigger ◽  
Coupling Constants ◽  
Stray Field ◽  
Interlayer Exchange Coupling ◽  
The Stability ◽  
Interlayer Exchange ◽  
Moriya Interaction

The current-induced domain wall (DW) motion in a racetrack memory with a synthetic antiferromagnets (SAFs) structure has attracted attention because of the ultrahigh velocity of the DW. However, since there is little stray field due to the zero net magnetization in a pair of antiferromagnetically (AFM) coupled domains, how to read the information stored in the pair of domains is still challenging. In the present work, we propose a readable SAF racetrack memory composed of two ferromagnetic (FM) layers with distinct uniaxial-anisotropy constants. As a result, a region of staggered domains formed between two neighboring DWs in the two layers. In this region, there is a parallel alignment of the moments in the two FM layers. This parallel magnetization is readable and can be exploited to label the structure of the nearby AFM-coupled domains for the racetrack with DWs moving in a fixed direction. This function can be realized by connecting a Schmitt Trigger to a sensor for reading. The stability and the length of the staggered region can be well-tuned by changing the magnetic parameters, such as the interlayer exchange coupling constants, the Dzyaloshinskii–Moriya interaction (DMI) constants, and the uniaxial-anisotropy constants of the two FM layers, in a range that is experimentally achievable.

Change of Interlayer Exchange Coupling between the Adjacent Magnetic Transition Metal Layers across a Rare-Earth Metal Layer by Hydrogenation

2006 ◽  
Vol 512 ◽  
pp. 177-182
Author(s):  
Yasushi Endo ◽  
Takanobu Sato ◽  
Tadashi Kaneko ◽  
Yoshio Kawamura ◽  
Masahiko Yamamoto
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Transition Metal ◽  
Rare Earth Metal ◽  
Exchange Coupling ◽  
Magnetic Transition ◽  
Earth Metal ◽  
Interlayer Exchange Coupling ◽  
The Difference ◽  
Interlayer Exchange

We have studied the change of the interlayer exchange coupling between the adjacent magnetic transition metal (TM) layers across a rare-earth metal (REM) layer by hydrogenation in TM (10 nm)/REM (t nm)/TM (10 nm) trilayers composed of Fe and Co as the TM and Y as the REM. In the case of the Fe as TM, the magnetic properties are sensitive to hydrogenation. In particular, the interlayer exchange coupling changes remarkably by hydrogenation. On the other hand, in the case of the Co as TM, the magnetic properties do not change by hydrogenation, and the change of the coupling by hydrogenation cannot be confirmed. The difference of the change of the coupling by hydrogenation between TM=Fe and TM=Co should be attributed to the difference of the TM/Y interface state.

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