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磁场和电流下畴壁的基本去钉过程。

Elementary depinning processes of magnetic domain walls under fields and currents.

机构信息

1] INAC/CEA Grenoble and Université Joseph Fourier, 38054, Grenoble, France [2] Institut Néel and Université Joseph Fourier, 38042 Grenoble, France.

INAC/CEA Grenoble and Université Joseph Fourier, 38054, Grenoble, France.

出版信息

Sci Rep. 2014 Oct 1;4:6509. doi: 10.1038/srep06509.

DOI:10.1038/srep06509
PMID:25270773
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4180821/
Abstract

The probability laws associated to domain wall depinning under fields and currents have been studied in NiFe and FePt nanowires. Three basic domain wall depinning processes, associated to different potential landscapes, are found to appear identically in those systems with very different anisotropies. We show that these processes constitute the building blocks of any complex depinning mechanism. A Markovian analysis is proposed, that provides a unified picture of the depinning mechanism and an insight into the pinning potential landscape.

摘要

在磁场和电流下的畴壁钉扎的概率定律已在 NiFe 和 FePt 纳米线中进行了研究。在具有非常不同各向异性的这些系统中，发现与不同的势垒相关的三种基本的畴壁钉扎过程以相同的方式出现。我们表明，这些过程构成了任何复杂的去钉扎机制的构建块。提出了一种马尔可夫分析，该分析为去钉扎机制提供了统一的图景，并深入了解了钉扎势垒。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf7f/4180821/f6c063ae3d8b/srep06509-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf7f/4180821/04c00235efcd/srep06509-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf7f/4180821/1bb220e98bfe/srep06509-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf7f/4180821/75eb9b76b6aa/srep06509-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf7f/4180821/f6c063ae3d8b/srep06509-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf7f/4180821/04c00235efcd/srep06509-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf7f/4180821/1bb220e98bfe/srep06509-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf7f/4180821/75eb9b76b6aa/srep06509-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf7f/4180821/f6c063ae3d8b/srep06509-f4.jpg

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本文引用的文献

1
Depinning probability of a magnetic domain wall in nanowires by spin-polarized currents.通过自旋极化电流使纳米线中磁畴壁去钉扎的概率。
Nat Commun. 2013;4:2293. doi: 10.1038/ncomms3293.
2
Two-barrier stability that allows low-power operation in current-induced domain-wall motion.允许在电流诱导的畴壁运动中低功耗运行的双势垒稳定性。
Nat Commun. 2013;4:2011. doi: 10.1038/ncomms3011.
3
Electric current effect on the energy barrier of magnetic domain wall depinning: origin of the quadratic contribution.电流对磁畴壁去钉扎能垒的影响：二次项的起源。
Phys Rev Lett. 2011 Nov 18;107(21):217205. doi: 10.1103/PhysRevLett.107.217205.
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J Phys Condens Matter. 2012 Jan 18;24(2):024220. doi: 10.1088/0953-8984/24/2/024220. Epub 2011 Dec 15.
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Phys Rev Lett. 2010 Jul 30;105(5):056601. doi: 10.1103/PhysRevLett.105.056601. Epub 2010 Jul 29.
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Phys Rev Lett. 2009 Apr 10;102(14):147204. doi: 10.1103/PhysRevLett.102.147204.
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Interdimensional universality of dynamic interfaces.动态界面的跨维度普遍性。
Nature. 2009 Apr 9;458(7239):740-2. doi: 10.1038/nature07874.
8
Thermal effects on domain wall depinning from a single notch.热对单个缺口处畴壁脱钉的影响。
Phys Rev Lett. 2007 Jun 29;98(26):267202. doi: 10.1103/PhysRevLett.98.267202. Epub 2007 Jun 27.
9
Direct imaging of stochastic domain-wall motion driven by nanosecond current pulses.纳秒级电流脉冲驱动的随机畴壁运动的直接成像
Phys Rev Lett. 2007 May 4;98(18):187202. doi: 10.1103/PhysRevLett.98.187202. Epub 2007 May 2.
10
Dependence of current and field driven depinning of domain walls on their structure and chirality in permalloy nanowires.坡莫合金纳米线中电流和场驱动的畴壁脱钉对其结构和手性的依赖性。
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