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Direct measurement of the magnetocaloric effect in cementite

Kaeswurm, B. and Friemert, K. and Gürsoy, M. and Skokov, K. P. and Gutfleisch, O. (2016):
Direct measurement of the magnetocaloric effect in cementite.
410, In: Journal of Magnetism and Magnetic Materials, ELSEVIER SCIENCE BV, pp. 105-108, ISSN 03048853, [Online-Edition: http://dx.doi.org/10.1016/j.jmmm.2016.02.080],
[Article]

Abstract

Measurements of the magnetocaloric effect of cementite at its Curie temperature of 475 K are presented. An adiabatic temperature change of 1.76 +/- 0.01 K was measured using a direct measurement technique. The isothermal entropy change was determined from measurements of magnetisation isotherms and was shown to be 3.07 J K-1 kg(-1) in a field change of 2 T. The field dependencies of both magnetocaloric properties follow the H-2/3 dependence typical for ferromagnetic materials with a second order phase transition. The material may be of interest in magnetocaloric applications such as magnetic refrigeration or thermomagnetic power generation. (C) 2016 Elsevier B.V. All rights reserved.

Item Type: Article
Erschienen: 2016
Creators: Kaeswurm, B. and Friemert, K. and Gürsoy, M. and Skokov, K. P. and Gutfleisch, O.
Title: Direct measurement of the magnetocaloric effect in cementite
Language: English
Abstract:

Measurements of the magnetocaloric effect of cementite at its Curie temperature of 475 K are presented. An adiabatic temperature change of 1.76 +/- 0.01 K was measured using a direct measurement technique. The isothermal entropy change was determined from measurements of magnetisation isotherms and was shown to be 3.07 J K-1 kg(-1) in a field change of 2 T. The field dependencies of both magnetocaloric properties follow the H-2/3 dependence typical for ferromagnetic materials with a second order phase transition. The material may be of interest in magnetocaloric applications such as magnetic refrigeration or thermomagnetic power generation. (C) 2016 Elsevier B.V. All rights reserved.

Journal or Publication Title: Journal of Magnetism and Magnetic Materials
Volume: 410
Publisher: ELSEVIER SCIENCE BV
Uncontrolled Keywords: Magnetocaloric effect, Second order phase transition, Ferromagnetism, Cementite, Cohenite
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Functional Materials
07 Department of Chemistry
07 Department of Chemistry > Fachgebiet Anorganische Chemie
07 Department of Chemistry > Physical Chemistry
Date Deposited: 11 May 2016 13:03
Official URL: http://dx.doi.org/10.1016/j.jmmm.2016.02.080
Identification Number: doi:10.1016/j.jmmm.2016.02.080
Funders: M.G. received funding from Deutsche Forschungsgemeinschaft (Darmstadt graduate school of energy science and engineering, GSC 1070)., The research leading to these results has received funding from the European community's seventh framework programme FP7/2007-2013 under grant agreement no. 310748 (DRREAM).
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