Random fields and apparent exchange bias in the dilute Ising antiferromagnet Fe(0.6)Zn(0.4)F(2)

Random field induced spontaneous excess moments appear in field cooled single crystals of diluted Ising antiferromagnets. Here we report results from low temperature measurements of field cooled (including zero field) magnetic hysteresis loops parallel and perpendicular to the c-axis of a single cry...

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Detalles Bibliográficos
Autores principales: Joshi, D. C., Nordblad, P., Mathieu, R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7471909/
https://www.ncbi.nlm.nih.gov/pubmed/32884093
http://dx.doi.org/10.1038/s41598-020-71533-6
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author Joshi, D. C.
Nordblad, P.
Mathieu, R.
author_facet Joshi, D. C.
Nordblad, P.
Mathieu, R.
author_sort Joshi, D. C.
collection PubMed
description Random field induced spontaneous excess moments appear in field cooled single crystals of diluted Ising antiferromagnets. Here we report results from low temperature measurements of field cooled (including zero field) magnetic hysteresis loops parallel and perpendicular to the c-axis of a single crystal of composition Fe(0.6)Zn(0.4)F(2). We find that weak static ferromagnetic excess moments attained on field cooling give rise to an apparent exchange bias of the magnetic hysteresis loops, whose magnitude is controlled by temperature and the strength and direction of the cooling field. Random field induced temporal excess moments only become observable in cooling fields larger than 1 T applied along the c-axis direction of the Fe(0.6)Zn(0.4)F(2) single crystal.
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spelling pubmed-74719092020-09-08 Random fields and apparent exchange bias in the dilute Ising antiferromagnet Fe(0.6)Zn(0.4)F(2) Joshi, D. C. Nordblad, P. Mathieu, R. Sci Rep Article Random field induced spontaneous excess moments appear in field cooled single crystals of diluted Ising antiferromagnets. Here we report results from low temperature measurements of field cooled (including zero field) magnetic hysteresis loops parallel and perpendicular to the c-axis of a single crystal of composition Fe(0.6)Zn(0.4)F(2). We find that weak static ferromagnetic excess moments attained on field cooling give rise to an apparent exchange bias of the magnetic hysteresis loops, whose magnitude is controlled by temperature and the strength and direction of the cooling field. Random field induced temporal excess moments only become observable in cooling fields larger than 1 T applied along the c-axis direction of the Fe(0.6)Zn(0.4)F(2) single crystal. Nature Publishing Group UK 2020-09-03 /pmc/articles/PMC7471909/ /pubmed/32884093 http://dx.doi.org/10.1038/s41598-020-71533-6 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Joshi, D. C.
Nordblad, P.
Mathieu, R.
Random fields and apparent exchange bias in the dilute Ising antiferromagnet Fe(0.6)Zn(0.4)F(2)
title Random fields and apparent exchange bias in the dilute Ising antiferromagnet Fe(0.6)Zn(0.4)F(2)
title_full Random fields and apparent exchange bias in the dilute Ising antiferromagnet Fe(0.6)Zn(0.4)F(2)
title_fullStr Random fields and apparent exchange bias in the dilute Ising antiferromagnet Fe(0.6)Zn(0.4)F(2)
title_full_unstemmed Random fields and apparent exchange bias in the dilute Ising antiferromagnet Fe(0.6)Zn(0.4)F(2)
title_short Random fields and apparent exchange bias in the dilute Ising antiferromagnet Fe(0.6)Zn(0.4)F(2)
title_sort random fields and apparent exchange bias in the dilute ising antiferromagnet fe(0.6)zn(0.4)f(2)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7471909/
https://www.ncbi.nlm.nih.gov/pubmed/32884093
http://dx.doi.org/10.1038/s41598-020-71533-6
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