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Dephasing-Assisted Macrospin Transport
2020
Entropy
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In the present work, we show, by means of micromagnetics simulations, that transport efficiency in a chain of classical macrospins can be greatly increased by an optimal level of dephasing noise. ...
There are, however, cases in which transport can be enhanced by fluctuations. ...
On the other hand, the generality of the DNLS model strongly suggests that dephasing-assisted transport is a general phenomenon that can be observed in a large class of classical oscillating systems. ...
doi:10.3390/e22020210
pmid:33285985
fatcat:6e5ciadw5vew3nfstwam2e44ha
Magnetization Dynamics
[article]
2018
arXiv
pre-print
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In the sub-threshold I < I c0 region, while no switching would be expected at zero temperature, with finite temperature, thermally-assisted reversal has a finite probability. ...
The dephasing of the spin component transverse to the magnetization under the usually strong s-d exchange-like interaction results in a net torque being exerted on the ferromagnetic moment. ...
arXiv:1810.04591v1
fatcat:eze62gbswzcqpkm4hbgvrfmhca
Maximizing Spin-Orbit Torque Generated by the Spin Hall Effect of Pt
[article]
2021
arXiv
pre-print
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Here we reviews recent advances in understanding the physics of spin current generation, interfacial spin transport, and the metrology of spin-orbit torques, and summarize progress towards the goal of ...
are thinner than its spin dephasing length (~1 nm for 3d FMs 104 ). ...
layer (interpreted in some literature as "to break the reversal symmetry" of a macrospin). ...
arXiv:2106.04992v2
fatcat:fh3zmdapc5dj3k7tu6ichscqr4
Ensemble-averaged Rabi oscillations in a ferromagnetic CoFeB film
2017
Nature Communications
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Our study is a step towards connecting concepts used in quantum processing with spin-transport effects in ferromagnets. ...
Acknowledgements We thank Dr Dan Rugar, Dr Chris Lutz and Dr John Mamin for fruitful discussions, and Chris Lada for expert technical assistance. ...
Furthermore, it is worth noting that although our macrospin model lacks spatial resolution, it reproduces the experimental results. ...
doi:10.1038/ncomms16004
pmid:28656960
pmcid:PMC5493749
fatcat:tfc7khitejba5kyuf4lrwgi6fm
Inductive determination of the optimum tunnel barrier thickness in magnetic tunneling junction stacks for spin torque memory applications
2011
Journal of Applied Physics
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2011 pre-print arXiv:1103.4248v1 fatcat:vrhczujqtjeo7f7ll2v5w7mdeu
Such inductive measurements, in combination with wafer probe station based magneto transport experiments, allow a fast determination of the optimum tunnel barrier thickness range for spin torque memory ...
However, a further systematic study of this impurity-assisted IEC in the sputtered CoFeB/MgO/CoFeB MTJs under a precise control of the parameter conditions during the growth process of the samples should ...
As the way the magnetization relaxes towards equilibrium is very sensitive to the details of the microscopic interactions 32 , this large magnetic inhomogeneity will lead to an inhomogeneous dephasing ...
doi:10.1063/1.3610948
fatcat:mcmzdw4jxjht7fj33gh55bkzci
Spin caloritronics
2012
Nature Materials
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This work was supported in part by the FOM Foundation, EU-ICT-7 'MACALO' , and DFG Priority Programme 1538 'Spin-Caloric Transport' . ...
The spin-related signal can be disentangled by the Hanle effect -that is, the dephasing of the spin accumulation by a transverse magnetic field. ...
If the underlying ferromagnet is macroscopically large, a macrospin approximation is not appropriate. ...
doi:10.1038/nmat3301
pmid:22522639
fatcat:3oftek665jaf5mq76vmfwbdvhm
Information transfer in coupled Langevin equations
[article]
2020
arXiv
pre-print
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More exotic situations such as discrete breathers and negative temperature states [32] , dephasing-assisted spin transport [33] and anomalous heat transport in oscillator chains [34] involve information ...
We remark that in spin systems the latter corresponds to the spin wave current that describes the net transport of the magnetisation between neighbouring macrospins [22] and as with Φ C , it is a coherent ...
arXiv:2004.03950v1
fatcat:uzgbxn7cqrbmlmuizdybpcxs6e
Charge pumping by magnetization dynamics in magnetic and semimagnetic tunnel junctions with interfacial Rashba or bulk extrinsic spin-orbit coupling
2012
Physical Review B
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requires to take into account up to ten photons in order to reach the asymptotic value of pumped charge current; (iv) disorder within F/I/F MTJs can enhance the dc pumping voltage in the quasiballistic transport ...
TAMR and spin dephasing in perpendicular transport through interfaces with the Rashba SOC To understand the correspondence between the strength of the Rashba SOC measured by the spindependent hopping parameter ...
Recent vigorous experimental efforts have focused on the direct detection of pure spin current generated by coherent macrospin precession in both ferromagnetic metals [11] [12] [13] and insulators 14 ...
doi:10.1103/physrevb.85.054406
fatcat:6mypccbxbngftjgtgo6dqyum6e
Current Induced Magnetization Dynamics in Electrodeposited Nanostructures
2010
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This apparent dephasing linked to the inversion of the field is not explained by our simple macrospin model, which presumes a "pure" STT excitation of the resonances. ...
Spin dependent transport in ferromagnets We adopt here a semiclassical description of transport phenomena in ferromagnetic materials. ...
doi:10.5075/epfl-thesis-4687
fatcat:euyhvmixxrbptoihpggcwecl3m
Magnetic Nanoparticles: A Subject for Both Fundamental Research and Applications
2013
Journal of Nanomaterials
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[35] reported the transport measurement performed in selfassembled Co particles. ...
The direction of the superspin or macrospin fluctuates with a frequency or a characteristic relaxation time, = (2 ) −1 . ...
doi:10.1155/2013/952540
fatcat:duyhyjcy4rfrzj5hhb2eyemplm
From Spin Torque Nano-Oscillators to Memristors: Multi-Functional Nanodevices for Advanced Computing
[article]
2014
arXiv
pre-print
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We have performed macrospin simulations taking into account the wavy dependence of spin transfer torque. ...
Thanks to macrospin simulations we have shown the possibility to synchronize several oscillators by this method. ...
arXiv:1407.1494v1
fatcat:3s7qby2ysngifjlxcl55su6nda
Towards high-density low-power spin-transfer-torque random access memory
[article]
2015
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Moreover, the traditionally used magnetic-eld-assisted random access memory (MRAM) is not scalable to smaller bits. ...
Results
Fokker-Planck calculation of WER within the macrospin approximation Here, we rst look at WER for a range of device dimensions within the macrospin approximation. ...
doi:10.15781/t24k9k
fatcat:lzyxqrpi6vfmnfcrddhgnpxs2i
Interface-Induced Phenomena in Magnetism
[article]
2017
arXiv
pre-print
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It starts with an introduction and overview of how basic magnetic properties are affected by interfaces, then turns to a discussion of charge and spin transport through and near interfaces and how these ...
, and Suzanne Kokosz at Argonne National Lab for her editing assistance. ...
One approach is the macrospin approximation, in which the magnetization is assumed to be spatially uniform. ...
arXiv:1607.00439v3
fatcat:v6w2ojb67je4jbg22hwdzzfrti
2019 Subject Index (N-Z) IEEE Transactions on Magnetics Vol. 55
2019
IEEE transactions on magnetics
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., +, TMAG Aug. 2019 1500309 Compact Macrospin-Based Model of Three-Terminal Spin-Hall Nano Oscillators. ...
Taniguchi, T., TMAG Feb. 2019 1400204 Effects of Elastic Dephasing on Scaling of Ultra-Small Magnetic Tunnel Junctions. ...
doi:10.1109/tmag.2020.2971166
fatcat:t37e2rcg2zez3oahabpj23ftaa
Antiferromagnetic spintronics
2018
Reviews of Modern Physics
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Intense research efforts over the past decade have been invested in unraveling spin transport properties in antiferromagnetic materials. ...
Whether spin transport can be used to drive the antiferromagnetic order and how subsequent variations can be detected are some of the thrilling challenges currently being addressed. ...
Other attempts reported efficient spin Hall assisted magnetic order reversal in FeMn and IrMn alloys Yang et al., 2016) . ...
doi:10.1103/revmodphys.90.015005
fatcat:evuoiwdjifctpl275k2lutlv4y
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