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FORC analysis of magnetocaloric Heusler-type alloys

Franco, Victorino and Gottschall, Tino and Skokov, Konstantin and Gutfleisch, Oliver (2016):
FORC analysis of magnetocaloric Heusler-type alloys.
In: IEEE Magnetics Letters, IEEE, p. 1, PP, (99), ISSN 1949-307X,
[Online-Edition: http://dx.doi.org/10.1109/LMAG.2016.2541622],
[Article]

Abstract

The thermomagnetic hysteresis loops of a Ni45.7Mn36.6In13.5Co4.2 Heusler-type alloy exhibiting inverse magnetocaloric effect were studied with the help of First Order Reversal Curves (FORC). These have been measured using two different protocols (either upon heating or cooling the sample) and using different applied magnetic fields. For proper comparison, FORC distributions were shifted according to the field dependent center of the M(T) hysteresis loop, which follows a linear trend. The qualitative behavior of FORC distributions remains the same, allowing their use for fingerprinting the transition, while there is a shift of their maxima along the hysteretic temperature axis and their distributions also get broader along the interaction temperature axis with increasing magnetic field. This was evidence that FORC distributions are dependent on the intensive variables temperature and field. As a consequence, it is necessary to obtain them for different temperatures and fields in order to accurately model the transition.

Item Type: Article
Erschienen: 2016
Creators: Franco, Victorino and Gottschall, Tino and Skokov, Konstantin and Gutfleisch, Oliver
Title: FORC analysis of magnetocaloric Heusler-type alloys
Language: English
Abstract:

The thermomagnetic hysteresis loops of a Ni45.7Mn36.6In13.5Co4.2 Heusler-type alloy exhibiting inverse magnetocaloric effect were studied with the help of First Order Reversal Curves (FORC). These have been measured using two different protocols (either upon heating or cooling the sample) and using different applied magnetic fields. For proper comparison, FORC distributions were shifted according to the field dependent center of the M(T) hysteresis loop, which follows a linear trend. The qualitative behavior of FORC distributions remains the same, allowing their use for fingerprinting the transition, while there is a shift of their maxima along the hysteretic temperature axis and their distributions also get broader along the interaction temperature axis with increasing magnetic field. This was evidence that FORC distributions are dependent on the intensive variables temperature and field. As a consequence, it is necessary to obtain them for different temperatures and fields in order to accurately model the transition.

Journal or Publication Title: IEEE Magnetics Letters
Volume: PP
Number: 99
Publisher: IEEE
Uncontrolled Keywords: FORC - First Order Reversal Curve Workshop (Magnetic Hysteresis), First order reversal curves, Heusler alloys, Magnetocaloric effect
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Functional Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 11 May 2016 12:58
Official URL: http://dx.doi.org/10.1109/LMAG.2016.2541622
Identification Number: doi:10.1109/LMAG.2016.2541622
Funders: V.F. acknowledges funding from the Deutscher Akademischer Austauschdienst DAAD Award A/13/09434, Spanish MINECO and EU FEDER (Project MAT2013-45165-P), and the PAI of the Regional Government of Andalucia., T.G. acknowledges funding from the DFG propriety program SPP1599., K.P.S. acknowledges funding from the European Community's seventh framework program FP 7/2007 -2013 under grant agreement n°310748 (DRREAM).)., O.G. acknowledges funding from the Hessian Excellence Programme LOEWE RESPONSE.
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