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  Electron Transport in Ferromagnetic Nanostructures

Stein, F.-U., & Meier, G. (2018). Electron Transport in Ferromagnetic Nanostructures. In R. Wiesendanger (Ed.), Atomic- and Nanoscale Magnetism (1st Ed., pp. 359-383). Basel: Springer Nature Switzerland AG. doi:10.1007/978-3-319-99558-8_18.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-800A-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-800B-1
Genre: Book Chapter

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Stein-Meier2018_Chapter_ElectronTransportInFerromagnet.pdf (Publisher version), 2MB
 
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 Creators:
Stein, F.-U.1, Author              
Meier, G.2, Author              
Affiliations:
1Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
2Dynamics and Transport in Nanostructures, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2074319              

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 Abstract: The proposal of logic- and memory devices based on magnetic domain-wall motion in nanostructures created a great demand on the understanding of the dynamics of domain walls. We describe the controlled creation and annihilation of domain walls by Oersted-field pulses as well as their internal dynamics during motion. Electric measurements of the magnetoresistance are utilized to identify permanent- or temporal creation and continuous motion of domain walls initiated by nanosecond short field pulses in external magnetic fields. The injection of domain walls into nanowires with control of their magnetic pattern (transverse or vortex), their type (head-to-head or tail-to-tail magnetization orientation) and their sense of magnetization rotation (clockwise or counter clockwise chirality) is reliably achieved. Influencing the creation process of consecutively created domain walls to obtain multiple walls inside one wire or to mutually annihilate the walls is found to be possible by changes of magnetic field parameters. The time structure of the creation process is analysed by time-resolved transmission X-ray microscopy. After complete formation wall transformations are observed above a critical driving field known as the Walker breakdown. Internal excitations of vortex domain walls are also found in low field motion. A strong interplay between internal dynamics and the macroscopic motion is identified.

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Language(s): eng - English
 Dates: 2018-11-032018-11
 Publication Status: Published in print
 Pages: 25
 Publishing info: -
 Table of Contents: -
 Rev. Method: Internal
 Identifiers: DOI: 10.1007/978-3-319-99558-8_18
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Title: Atomic- and Nanoscale Magnetism
Source Genre: Book
 Creator(s):
Wiesendanger, R.1, Editor
Affiliations:
1 University of Hamburg, ou_persistent22            
Publ. Info: Basel : Springer Nature Switzerland AG, 1st Ed.
Pages: 25 Volume / Issue: - Sequence Number: - Start / End Page: 359 - 383 Identifier: ISBN: 978-3-319-99557-1
DOI: 10.1007/978-3-319-99558-8