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Title: Determination of the Transition Temperature of a Weak Ferromagnetic Thin Film by Means of an Evolution of the Method Based on the Arrott Plots

Abstract

The ferromagnetic transition temperature (T{sub c}) of a weak ferromagnetic thin film Cu{sub 0.38}Ni{sub 0.62} has been estimated by using an evolution of the Belov, Goriaga, and Arrott (BGA) model. In fact, the typically used measurements of the zero-field-cooled-field-cooled magnetic moment (m) as a function of temperature (T), the magnetic hysteresis loops (m(H)) as a function of field, and the temperature dependence of the remanent magnetic moment, performed on our sample, did not allow us to individuate precisely the value of T{sub c}, mainly due to the influence of thermal effects and noise on the weak ferromagnetic response of the sample, resulting in a large uncertainty in the estimation of T{sub c}. On the other hand, also the commonly used method of determining the T{sub c} by means of a linear extrapolation of the high-field region of m{sup 2} as a function of the normalized magnetic field (H/m) at different temperatures (Arrott curves), working though for our analyzed material, could not completely fulfill the basic assumptions of the BGA model in general. For these reasons, we have considered the analysis of the derivatives of the Arrott curves, starting from observing that the T{sub c} of the sample corresponds to themore » temperature where the curvature of the Arrott curves at low fields inverts. In this way, the sensitivity in the determination of the Curie point from the inductive measurements of the magnetic moment is improved while the correct assumptions of the Arrott model are also fully respected.« less

Authors:
; ; ; ; ;  [1]
  1. University of Salerno, Department of Physics “E.R. Caianiello” (Italy)
Publication Date:
OSTI Identifier:
22776971
Resource Type:
Journal Article
Journal Name:
Journal of Superconductivity and Novel Magnetism
Additional Journal Information:
Journal Volume: 31; Journal Issue: 4; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; Article Copyright (c) 2017 Springer Science+Business Media, LLC; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1557-1939
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COPPER ALLOYS; CURIE POINT; DIAGRAMS; FERROMAGNETIC MATERIALS; HYSTERESIS; MAGNETIC FIELDS; MAGNETIC MOMENTS; MAGNETIZATION; TEMPERATURE DEPENDENCE; THIN FILMS

Citation Formats

Galluzzi, A., Mancusi, D., Cirillo, C., Attanasio, C., Pace, S., and Polichetti, M., E-mail: polimax@sa.infn.it. Determination of the Transition Temperature of a Weak Ferromagnetic Thin Film by Means of an Evolution of the Method Based on the Arrott Plots. United States: N. p., 2018. Web. doi:10.1007/S10948-017-4281-4.
Galluzzi, A., Mancusi, D., Cirillo, C., Attanasio, C., Pace, S., & Polichetti, M., E-mail: polimax@sa.infn.it. Determination of the Transition Temperature of a Weak Ferromagnetic Thin Film by Means of an Evolution of the Method Based on the Arrott Plots. United States. doi:10.1007/S10948-017-4281-4.
Galluzzi, A., Mancusi, D., Cirillo, C., Attanasio, C., Pace, S., and Polichetti, M., E-mail: polimax@sa.infn.it. Sun . "Determination of the Transition Temperature of a Weak Ferromagnetic Thin Film by Means of an Evolution of the Method Based on the Arrott Plots". United States. doi:10.1007/S10948-017-4281-4.
@article{osti_22776971,
title = {Determination of the Transition Temperature of a Weak Ferromagnetic Thin Film by Means of an Evolution of the Method Based on the Arrott Plots},
author = {Galluzzi, A. and Mancusi, D. and Cirillo, C. and Attanasio, C. and Pace, S. and Polichetti, M., E-mail: polimax@sa.infn.it},
abstractNote = {The ferromagnetic transition temperature (T{sub c}) of a weak ferromagnetic thin film Cu{sub 0.38}Ni{sub 0.62} has been estimated by using an evolution of the Belov, Goriaga, and Arrott (BGA) model. In fact, the typically used measurements of the zero-field-cooled-field-cooled magnetic moment (m) as a function of temperature (T), the magnetic hysteresis loops (m(H)) as a function of field, and the temperature dependence of the remanent magnetic moment, performed on our sample, did not allow us to individuate precisely the value of T{sub c}, mainly due to the influence of thermal effects and noise on the weak ferromagnetic response of the sample, resulting in a large uncertainty in the estimation of T{sub c}. On the other hand, also the commonly used method of determining the T{sub c} by means of a linear extrapolation of the high-field region of m{sup 2} as a function of the normalized magnetic field (H/m) at different temperatures (Arrott curves), working though for our analyzed material, could not completely fulfill the basic assumptions of the BGA model in general. For these reasons, we have considered the analysis of the derivatives of the Arrott curves, starting from observing that the T{sub c} of the sample corresponds to the temperature where the curvature of the Arrott curves at low fields inverts. In this way, the sensitivity in the determination of the Curie point from the inductive measurements of the magnetic moment is improved while the correct assumptions of the Arrott model are also fully respected.},
doi = {10.1007/S10948-017-4281-4},
journal = {Journal of Superconductivity and Novel Magnetism},
issn = {1557-1939},
number = 4,
volume = 31,
place = {United States},
year = {2018},
month = {4}
}