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Evidence of Ferromagnetic Response of TbMnO3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$_{3}$$\end{document} Thin Films at High Temperatures

Authors
  • Izquierdo, J. L.1
  • Astudillo, A.2
  • Bolaños, G.2
  • Gómez, A.3
  • Arnache, O.4
  • Parra, C.5
  • Morán, O.1
  • 1 Universidad Nacional de Colombia, Departamento de Física, Facultad de Ciencias, Laboratorio de Cerámicos y Vítreos, Campus Medellín, A.A. 568, Medellín, Colombia , Medellín (Colombia)
  • 2 Universidad del Cauca, Departamento de Física, Laboratorio de Bajas Temperaturas, Calle 5 No. 4-70, Popayán, Colombia , Popayán (Colombia)
  • 3 Universidad Nacional de Colombia, Facultad de Minas, Laboratorio de Caracterización de Materiales, Campus Medellín, A.A. 568, Medellín, Colombia , Medellín (Colombia)
  • 4 Universidad de Antioquia, Departamento de Física, Grupo de Estado Sólido, Medellín, A.A. 1226, Colombia , Medellín (Colombia)
  • 5 Universidad Pedagógica y Tecnológica de Colombia, Departamento de Física, Avenida Central del Norte 39-115, Tunja, Colombia , Tunja (Colombia)
Type
Published Article
Journal
Journal of Low Temperature Physics
Publisher
Springer US
Publication Date
Nov 06, 2014
Volume
179
Issue
1-2
Pages
48–54
Identifiers
DOI: 10.1007/s10909-014-1247-9
Source
Springer Nature
Keywords
License
Yellow

Abstract

Magnetometry measurements performed on TbMnO3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$_{3}$$\end{document} films grown onto single-crystal [001] SrTiO3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$_{3}$$\end{document} substrates using magnetron sputtering technique exhibit series of anomalies related to the magnetic ordering of the Mn3+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{3+}$$\end{document} sublattice. Despite the fact that bulk TbMnO3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$_{3}$$\end{document} is a low-temperature antiferromagnet, the measurements indicate the presence of high-temperature ferromagnetism. Well-defined hysteresis loops are observed at temperatures as high as 70 K. Analysis of the X-ray diffraction patterns of the target and films shows no evidence of affectation (within the resolution limit of the technique) by external impurities, such as Mn3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$_{3}$$\end{document}O4\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$_{4}$$\end{document}, which might give rise to an artificial magnetic signal. Thus, it is probable that the ferromagnetism observed in the films to be an intrinsic property of TbMnO3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$_{3}$$\end{document}. Concretely, it is possible that the strain imposed by the substrate, resulting in the tetragonally distorted orthorhombic phase of the TbMnO3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$_{3}$$\end{document} films, is behind the mechanism governing the anomalous ferromagnetism observed in the films.

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