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

Kaeswurm, B. and Barcza, A. and Vögler, Malte and Geiger, Philipp T. and Katter, M. and Gutfleisch, Oliver 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 Science Publishing, pp. 427-433, (697), ISSN 09258388, [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, Malte and Geiger, Philipp T. and Katter, M. and Gutfleisch, Oliver 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
Number: 697
Publisher: Elsevier Science Publishing
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 > Nonmetallic-Inorganic Materials
Date Deposited: 18 Jan 2017 06:51
Identification Number: doi: 10.1016j.jallcom.2016.11.360
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