TU Darmstadt / ULB / TUbiblio

Behaviour of the Young's modulus at the magnetocaloric transition in La(Fe,Co,Si)13

Kaeswurm, B. and Barcza, A. and Vögler, M. and Geiger, P. T. and Katter, M. and Gutfleisch, O. and Cohen, L. F. (2017):
Behaviour of the Young's modulus at the magnetocaloric transition in La(Fe,Co,Si)13.
In: Journal of Alloys and Compounds, Elsevier, pp. 427-433, 697, ISSN 09258388, [Online-Edition: http://doi.org/10.1016/j.jallcom.2016.11.360],
[Article]

Abstract

Magnetic solid state cooling applications require families of samples where the magnetic transition is cascaded across the working range of the fridge. Although magnetic properties are widely studied, information relating to the mechanical properties of such systems is less prevalent. Here we study the mechanical properties of a series of magnetocaloric La(Co,Fe,Si)13 samples where the Co content is varied to produce a range of transition temperatures. It was found that at room temperature the flexural strength decreases and the Young's modulus increases with increasing Co content. Interestingly we find a significant reduction of Young's modulus at temperature around the magnetic transition temperature. This reduction was less pronounced with increasing Co content. We associate the softening with the magnetovolume coupling known to exist in these materials.

Item Type: Article
Erschienen: 2017
Creators: Kaeswurm, B. and Barcza, A. and Vögler, M. and Geiger, P. T. and Katter, M. and Gutfleisch, O. and Cohen, L. F.
Title: Behaviour of the Young's modulus at the magnetocaloric transition in La(Fe,Co,Si)13
Language: English
Abstract:

Magnetic solid state cooling applications require families of samples where the magnetic transition is cascaded across the working range of the fridge. Although magnetic properties are widely studied, information relating to the mechanical properties of such systems is less prevalent. Here we study the mechanical properties of a series of magnetocaloric La(Co,Fe,Si)13 samples where the Co content is varied to produce a range of transition temperatures. It was found that at room temperature the flexural strength decreases and the Young's modulus increases with increasing Co content. Interestingly we find a significant reduction of Young's modulus at temperature around the magnetic transition temperature. This reduction was less pronounced with increasing Co content. We associate the softening with the magnetovolume coupling known to exist in these materials.

Journal or Publication Title: Journal of Alloys and Compounds
Volume: 697
Publisher: Elsevier
Uncontrolled Keywords: Magnetocaloric, Ferromagnetic, Phase Transition, La(Fe,Si)13, Lattice softening, Young's modulus
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
Date Deposited: 17 Mar 2017 09:45
Official URL: http://doi.org/10.1016/j.jallcom.2016.11.360
Identification Number: doi:10.1016/j.jallcom.2016.11.360
Funders: The research leading to these results has received funding from the European community's seventh framework programme FP 7/2007–2013 under grant agreement no 310748 (DRREAM).
Export:

Optionen (nur für Redakteure)

View Item View Item