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Title: Combined effects of vertical and lateral confinement on the magnetic properties of MnAs micro and nano-ribbons

Abstract

The micromagnetic domain structure of MnAs films gave place to an intense research activity in the last few years due to its potential application in magneto-electronic devices such as domain-wall track memories and logic circuits. These applications require a full knowledge of miniaturization effects on the magnetic properties of the material. In this work, X-ray photoemission electron microscopy has been used for imaging magnetic domains in lithographically fabricated MnAs ribbons, addressing the dependence of the domain configuration on film thickness and ribbon width. Our experiments show a transition from head-on to regular stripe domains below a critical width/thickness ratio w{sub c} ≈ 6. Micromagnetic simulations suggest that this transition is correlated to the magnetic structure of the surface plane. Depending on the ribbon width and thickness, the magnetic configuration is shown to evolve from flux-closure domain structure to a state of almost homogeneous magnetization, observed for narrower ribbons. The evolution of the domain structure, magnetic fraction, and magnetization with temperature has been studied across the ferromagnetic/paramagnetic transition. Our experiments show that the magnetic configuration in ribbons exhibits higher stability to temperature variations than in as-cast films.

Authors:
;  [1];  [2]; ;  [3];  [2]; ;  [4];  [5];  [6]; ; ;  [7]
  1. Centro Atómico Constituyentes CNEA, 1650 San Martín (Argentina)
  2. (Argentina)
  3. Consejo Nacional de Investigaciones Científicas y Técnicas, C1033AAJ Buenos Aires (Argentina)
  4. Sorbonne Universités, UPMC Univ. Paris 06, UMR 7588, INSP, 4 place Jussieu, F-75005 Paris (France)
  5. (France)
  6. Fédération Lavoisier Franklin, UVSQ, 78035 Versailles Cedex (France)
  7. Elettra-Sincrotrone Trieste S.C.p.A., 34149 Basovizza, Trieste (Italy)
Publication Date:
OSTI Identifier:
22598808
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 120; Journal Issue: 9; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CONFIGURATION; CONFINEMENT; DOMAIN STRUCTURE; ELECTRON MICROSCOPY; ELECTRONIC EQUIPMENT; FILMS; IMAGES; LOGIC CIRCUITS; MAGNETIC PROPERTIES; MAGNETIZATION; MANGANESE ARSENIDES; MINIATURIZATION; PARAMAGNETISM; PHOTOEMISSION; SURFACES; THICKNESS; WIDTH; X RADIATION

Citation Formats

Steren, L. B., Tortarolo, M., Consejo Nacional de Investigaciones Científicas y Técnicas, C1033AAJ Buenos Aires, Fernandez Baldis, F., Sirena, M., Centro Atómico Bariloche and Instituto Balseiro, CNEA, 8400 S. C. de Bariloche, Sacchi, M., Eddrief, M., CNRS, UMR 7588, Institut des Nanosciences de Paris, 4 place Jussieu, F-75005 Paris, Etgens, V. H., Santos, B., Mentes, T. O., and Locatelli, A. Combined effects of vertical and lateral confinement on the magnetic properties of MnAs micro and nano-ribbons. United States: N. p., 2016. Web. doi:10.1063/1.4961501.
Steren, L. B., Tortarolo, M., Consejo Nacional de Investigaciones Científicas y Técnicas, C1033AAJ Buenos Aires, Fernandez Baldis, F., Sirena, M., Centro Atómico Bariloche and Instituto Balseiro, CNEA, 8400 S. C. de Bariloche, Sacchi, M., Eddrief, M., CNRS, UMR 7588, Institut des Nanosciences de Paris, 4 place Jussieu, F-75005 Paris, Etgens, V. H., Santos, B., Mentes, T. O., & Locatelli, A. Combined effects of vertical and lateral confinement on the magnetic properties of MnAs micro and nano-ribbons. United States. doi:10.1063/1.4961501.
Steren, L. B., Tortarolo, M., Consejo Nacional de Investigaciones Científicas y Técnicas, C1033AAJ Buenos Aires, Fernandez Baldis, F., Sirena, M., Centro Atómico Bariloche and Instituto Balseiro, CNEA, 8400 S. C. de Bariloche, Sacchi, M., Eddrief, M., CNRS, UMR 7588, Institut des Nanosciences de Paris, 4 place Jussieu, F-75005 Paris, Etgens, V. H., Santos, B., Mentes, T. O., and Locatelli, A. Wed . "Combined effects of vertical and lateral confinement on the magnetic properties of MnAs micro and nano-ribbons". United States. doi:10.1063/1.4961501.
@article{osti_22598808,
title = {Combined effects of vertical and lateral confinement on the magnetic properties of MnAs micro and nano-ribbons},
author = {Steren, L. B. and Tortarolo, M. and Consejo Nacional de Investigaciones Científicas y Técnicas, C1033AAJ Buenos Aires and Fernandez Baldis, F. and Sirena, M. and Centro Atómico Bariloche and Instituto Balseiro, CNEA, 8400 S. C. de Bariloche and Sacchi, M. and Eddrief, M. and CNRS, UMR 7588, Institut des Nanosciences de Paris, 4 place Jussieu, F-75005 Paris and Etgens, V. H. and Santos, B. and Mentes, T. O. and Locatelli, A.},
abstractNote = {The micromagnetic domain structure of MnAs films gave place to an intense research activity in the last few years due to its potential application in magneto-electronic devices such as domain-wall track memories and logic circuits. These applications require a full knowledge of miniaturization effects on the magnetic properties of the material. In this work, X-ray photoemission electron microscopy has been used for imaging magnetic domains in lithographically fabricated MnAs ribbons, addressing the dependence of the domain configuration on film thickness and ribbon width. Our experiments show a transition from head-on to regular stripe domains below a critical width/thickness ratio w{sub c} ≈ 6. Micromagnetic simulations suggest that this transition is correlated to the magnetic structure of the surface plane. Depending on the ribbon width and thickness, the magnetic configuration is shown to evolve from flux-closure domain structure to a state of almost homogeneous magnetization, observed for narrower ribbons. The evolution of the domain structure, magnetic fraction, and magnetization with temperature has been studied across the ferromagnetic/paramagnetic transition. Our experiments show that the magnetic configuration in ribbons exhibits higher stability to temperature variations than in as-cast films.},
doi = {10.1063/1.4961501},
journal = {Journal of Applied Physics},
number = 9,
volume = 120,
place = {United States},
year = {Wed Sep 07 00:00:00 EDT 2016},
month = {Wed Sep 07 00:00:00 EDT 2016}
}
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