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Effect of large mechanical stress on the magnetic properties of embedded Fe nanoparticles
Magnetic nanoparticles are promising candidates for next generation high density magnetic data storage devices. Data storage requires precise control of the magnetic properties of materials, in which the magnetic anisotropy plays a dominant role. Since the total magneto-crystalline anisotropy energy...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Beilstein-Institut
2011
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3148048/ https://www.ncbi.nlm.nih.gov/pubmed/21977439 http://dx.doi.org/10.3762/bjnano.2.31 |
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author | Saranu, Srinivasa Selve, Sören Kaiser, Ute Han, Luyang Wiedwald, Ulf Ziemann, Paul Herr, Ulrich |
author_facet | Saranu, Srinivasa Selve, Sören Kaiser, Ute Han, Luyang Wiedwald, Ulf Ziemann, Paul Herr, Ulrich |
author_sort | Saranu, Srinivasa |
collection | PubMed |
description | Magnetic nanoparticles are promising candidates for next generation high density magnetic data storage devices. Data storage requires precise control of the magnetic properties of materials, in which the magnetic anisotropy plays a dominant role. Since the total magneto-crystalline anisotropy energy scales with the particle volume, the storage density in media composed of individual nanoparticles is limited by the onset of superparamagnetism. One solution to overcome this limitation is the use of materials with extremely large magneto-crystalline anisotropy. In this article, we follow an alternative approach by using magneto-elastic interactions to tailor the total effective magnetic anisotropy of the nanoparticles. By applying large biaxial stress to nanoparticles embedded in a non-magnetic film, it is demonstrated that a significant modification of the magnetic properties can be achieved. The stress is applied to the nanoparticles through expansion of the substrate during hydrogen loading. Experimental evidence for stress induced magnetic effects is presented based on temperature-dependent magnetization curves of superparamagnetic Fe particles. The results show the potential of the approach for adjusting the magnetic properties of nanoparticles, which is essential for application in future data storage media. |
format | Online Article Text |
id | pubmed-3148048 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | Beilstein-Institut |
record_format | MEDLINE/PubMed |
spelling | pubmed-31480482011-10-05 Effect of large mechanical stress on the magnetic properties of embedded Fe nanoparticles Saranu, Srinivasa Selve, Sören Kaiser, Ute Han, Luyang Wiedwald, Ulf Ziemann, Paul Herr, Ulrich Beilstein J Nanotechnol Full Research Paper Magnetic nanoparticles are promising candidates for next generation high density magnetic data storage devices. Data storage requires precise control of the magnetic properties of materials, in which the magnetic anisotropy plays a dominant role. Since the total magneto-crystalline anisotropy energy scales with the particle volume, the storage density in media composed of individual nanoparticles is limited by the onset of superparamagnetism. One solution to overcome this limitation is the use of materials with extremely large magneto-crystalline anisotropy. In this article, we follow an alternative approach by using magneto-elastic interactions to tailor the total effective magnetic anisotropy of the nanoparticles. By applying large biaxial stress to nanoparticles embedded in a non-magnetic film, it is demonstrated that a significant modification of the magnetic properties can be achieved. The stress is applied to the nanoparticles through expansion of the substrate during hydrogen loading. Experimental evidence for stress induced magnetic effects is presented based on temperature-dependent magnetization curves of superparamagnetic Fe particles. The results show the potential of the approach for adjusting the magnetic properties of nanoparticles, which is essential for application in future data storage media. Beilstein-Institut 2011-06-01 /pmc/articles/PMC3148048/ /pubmed/21977439 http://dx.doi.org/10.3762/bjnano.2.31 Text en Copyright © 2011, Saranu et al. https://creativecommons.org/licenses/by/2.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms) |
spellingShingle | Full Research Paper Saranu, Srinivasa Selve, Sören Kaiser, Ute Han, Luyang Wiedwald, Ulf Ziemann, Paul Herr, Ulrich Effect of large mechanical stress on the magnetic properties of embedded Fe nanoparticles |
title | Effect of large mechanical stress on the magnetic properties of embedded Fe nanoparticles |
title_full | Effect of large mechanical stress on the magnetic properties of embedded Fe nanoparticles |
title_fullStr | Effect of large mechanical stress on the magnetic properties of embedded Fe nanoparticles |
title_full_unstemmed | Effect of large mechanical stress on the magnetic properties of embedded Fe nanoparticles |
title_short | Effect of large mechanical stress on the magnetic properties of embedded Fe nanoparticles |
title_sort | effect of large mechanical stress on the magnetic properties of embedded fe nanoparticles |
topic | Full Research Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3148048/ https://www.ncbi.nlm.nih.gov/pubmed/21977439 http://dx.doi.org/10.3762/bjnano.2.31 |
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