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.
697, In: Journal of Alloys and Compounds, pp. 427-433. Elsevier, 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, 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). |
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