scholarly journals Large magnetic moments and anomalous exchange coupling in As-doped Mn clusters

2006 ◽  
Vol 73 (7) ◽  
Author(s):  
Mukul Kabir ◽  
D. G. Kanhere ◽  
Abhijit Mookerjee
Keyword(s):  
Exchange Coupling ◽  
Magnetic Moments

scholarly journals Control of the noncollinear interlayer exchange coupling

2020 ◽  
Vol 6 (48) ◽  
pp. eabd8861
Author(s):  
Zachary R. Nunn ◽  
Claas Abert ◽  
Dieter Suess ◽  
Erol Girt
Keyword(s):  
Exchange Coupling ◽  
Magnetic Moments ◽  
Interlayer Exchange Coupling ◽  
Magnetic Structures ◽  
Spintronic Devices ◽  
Spacer Layer ◽  
Ferromagnetic Layers ◽  
Almost All ◽  
Interlayer Exchange ◽  
Coupling Angle

Interlayer exchange coupling in transition metal multilayers has been intensively studied for more than three decades and is incorporated into almost all spintronic devices. With the current spacer layers, only collinear magnetic alignment can be reliably achieved; however, controlling the coupling angle has the potential to markedly expand the use of interlayer exchange coupling. Here, we show that the coupling angle between the magnetic moments of two ferromagnetic layers can be precisely controlled by inserting a specially designed magnetic metallic spacer layer between them. The coupling angle is controlled solely by the composition of the spacer layer. Moreover, the biquadratic coupling strength, responsible for noncollinear alignment, is larger than that of current materials. These properties allow for the fabrication and study of not yet realized magnetic structures that have the potential to improve existing spintronic devices.

scholarly journals Studies on the electronic structures, exchange coupling and magnetic moments of spin and orbital in the compound SmCo55

2005 ◽  
Vol 54 (4) ◽  
pp. 1814
Author(s):  
Zhang Chang-Wen ◽  
Li Hua ◽  
Dong Jian-Min ◽  
Wang Yong-Juan ◽  
Pan Feng-Chun ◽  
...  
Keyword(s):  
Electronic Structures ◽  
Exchange Coupling ◽  
Magnetic Moments

Magnetic moments, exchange coupling, and crossover temperatures of Co clusters on Pt(111) and Au(111)

2007 ◽  
Vol 19 (9) ◽  
pp. 096203 ◽  
Author(s):  
O Šipr ◽  
S Bornemann ◽  
J Minár ◽  
S Polesya ◽  
V Popescu ◽  
...  
Keyword(s):  
Exchange Coupling ◽  
Magnetic Moments

Spin Polarization of PT in Pt/Co Multilayers Studied by X-Ray Absorption

1991 ◽  
Vol 231 ◽  
Author(s):  
G. Schütz ◽  
H. Ebert ◽  
P. Fischer ◽  
S. Rüegg ◽  
W. B. Zeper
Keyword(s):  
Spin Polarization ◽  
Exchange Coupling ◽  
Magnetic Moments ◽  
Multilayered Structures ◽  
X Ray ◽  
Total Magnetization ◽  
Experimental Findings ◽  
X Ray Absorption

AbstractLocal d-magnetic moments of the Pt interlayer in Pt/Co multilayered structures (4 ÅCo + X ÅPt, X=9,19,23,30,40) have been investigated theoretically and experimentally by circular magnetic x-ray dichroism studies.It has been found that a significant Pt polarization is induced, which contributes by about 13% to the total magnetization. The experimental findings of the average Pt moments agree well with the theoretical expectations indicating the existence of a longrange exchange coupling through the Pt layer.

Step-Induced Magnetic Defects in Fe/Cr Systems

1997 ◽  
Vol 475 ◽  
Author(s):  
M. Freyss ◽  
D. Stoeffler ◽  
H. Dreysse
Keyword(s):  
Exchange Coupling ◽  
Essential Role ◽  
Magnetic Order ◽  
Magnetic Moments ◽  
Topological Defects ◽  
The Other ◽  
Coupling Mechanism ◽  
Atomic Step ◽  
Other Hand ◽  
Multilayered Systems

ABSTRACTWe present the results of calculations of the magnetic order in Fe/Cr systems with a mono-atomic step at the interface. The study of such a systems is of particular interest since it is believed that topological defects play an essential role in the exchange coupling mechanism in Fe/Cr multilayered systems. We show that assuming only collinear magnetism, an interfacial step creates a very extended magnetic defect in the Cr layer. On the other hand, when the local magnetic moments are allowed to rotate, the magnetic defect is very localized near the step and the presence of the step induces a non-collinear coupling between the Fe layers in Fe/Cr superlattices.

LuGd: A system exhibiting positive exchange coupling between conduction electrons and localised magnetic moments

1978 ◽  
Vol 49 (3) ◽  
pp. 1440-1442 ◽  
Author(s):  
R. W. Cochrane ◽  
J. O. Ström‐Olsen ◽  
Gwyn Williams
Keyword(s):  
Exchange Coupling ◽  
Magnetic Moments ◽  
Conduction Electrons

scholarly journals Giant exchange coupling and field-induced slow relaxation of magnetization in Gd2@C79N with a single-electron Gd–Gd bond

2018 ◽  
Vol 54 (23) ◽  
pp. 2902-2905 ◽  
Author(s):  
G. Velkos ◽  
D. S. Krylov ◽  
K. Kirkpatrick ◽  
X. Liu ◽  
L. Spree ◽  
...  
Keyword(s):  
Electron Spin ◽  
Unpaired Electron ◽  
Exchange Coupling ◽  
Magnetic Moments ◽  
Slow Relaxation ◽  
Single Electron ◽  
Ferromagnetic Coupling

Single-electron Gd–Gd bond in Gd2@C79N results in giant ferromagnetic coupling between local 4f magnetic moments and unpaired electron spin.

Effects of interfacial Dzyaloshinskii–Moriya interaction on magnetic dynamics

2021 ◽  
Author(s):  
Maokang Shen ◽  
Xiangyu Li ◽  
Yue Zhang ◽  
Xiaofei Yang ◽  
Shi Chen
Keyword(s):  
Spin Wave ◽  
Exchange Coupling ◽  
Magnetic Moments ◽  
Asymmetric Structure ◽  
Interlayer Exchange Coupling ◽  
Chiral Structure ◽  
Magnetic Dynamics ◽  
Anisotropic Exchange ◽  
Magnetic Dynamic ◽  
Moriya Interaction

Abstract In the “Beyond Moore” era, the information device is expected to exhibit advantages including small sizes, high processing speed, and low power and dissipation. The novel magnetic information device with these advantages is made of heavy metal(HM)/ferromagnet (FM) composite. Owing to the asymmetric structure, the anisotropic exchange coupling named the interfacial Dzyaloshinskii–Moriya interaction (iDMI) is generated at the HM/FM interface. This iDMI influences the magnetic dynamics including ferromagnetic resonance (FMR), spin wave, and the motion of chiral DWs. These magnetic dynamic behaviors are the bases of the functions of novel magnetic information devices. Therefore, the influence of iDMI on the magnetic dynamics has attracted wide attention in recent years. In this topical review, we give a detailed introduction and discussion about recent investigation on the iDMI-relevant magnetic dynamics of the HM/FM bilayer system. This review consists of five sections: (1). the introduction about the background, the basic theory of magnetic dynamics and DMI; (2). the review about the effect of iDMI on the propagation of spin wave. Owing to the iDMI, the dispersion relationship of spin wave is asymmetric. This not only offers a precise method for measuring the iDMI constant, but also gives rise to potential application for novel magnonic devices. (3). the review about the effect of iDMI on the FMR. Unique iDMI-relevant mode was observed in the FMR spectra owing to the nonparallel alignment of magnetic moments. (4). the review about the motion of DWs with chiral structure due to iDMI. The iDMI plays a fundamental role in the high velocity of the chiral DWs. Meanwhile, the iDMI results in the tilting of DW plane, and the mechanism has been widely investigated. The tilting of the DW plane may be depressed by the interlayer exchange coupling. (5). finally, we summarize the review and give an outlook.

Indirect Exchange Coupling of Magnetic Moments in Rare-Earth Metals

1971 ◽  
Vol 3 (3) ◽  
pp. 1025-1033 ◽  
Author(s):  
Lawrence Baylor Robinson ◽  
Lloyd N. Ferguson ◽  
Frederick Milstein
Keyword(s):  
Rare Earth ◽  
Exchange Coupling ◽  
Magnetic Moments ◽  
Rare Earth Metals ◽  
Indirect Exchange

Electronic States and Magnetic Coupling in Fe/Fe3O4 Junctions

2011 ◽  
Vol 1292 ◽  
Author(s):  
J. Inoue ◽  
T. Kida ◽  
S. Honda ◽  
H. Itoh ◽  
H. Yanagihara ◽  
...  
Keyword(s):  
Exchange Coupling ◽  
Magnetic Moments ◽  
Magnetic Coupling ◽  
Exchange Interactions ◽  
Coupling Energy ◽  
Local Moments ◽  
Potential Applicability ◽  
Atomic Exchange ◽  
Magnetic States ◽  
Fe Ions

ABSTRACTExchange coupling observed recently in Fe/ Fe3O4 (001) junctions shows comparable intensity to that in Co/Ru/Co trilayers, and has potential applicability to spintronics devices. To clarify the mechanism of the exchange coupling, electronic and magnetic states of Fe/ Fe3O4 junctions are calculated in the first principles method by assuming four junction structures of bcc Fe and Fe3O4 layers. It is shown that the local moments of bcc Fe atoms at the interface increase, but those of Fe ions at the interface of Fe3O4 layer decrease. The total energy of the junctions is plotted as a function of distance between Fe and Fe3O4 layers. Calculated results of the coupling energy between Fe and Fe3O4 layers, however, are larger than experimental ones by two orders of magnitude, and they correspond to inter-atomic exchange interactions at the interface. In order to explain the experimental results, we propose a mechanism of exchange coupling mediated by impurity-like states of interfacial Fe atoms which possess reversed magnetic moments in bcc Fe layer. Frustration effects in exchange coupling between Fe and Fe3O4 layers are also discussed.

Sign in / Sign up

Export Citation Format

Share Document