The impact of surface morphology on the magnetovolume transition in magnetocaloric LaFe11.8Si1.2
First order magnetocaloric materials reach high entropy changes but at the same time exhibit hysteresis losses which depend on the sample’s microstructure. We use non-destructive 3D X-ray microtomography to understand the role of surface morphology for the magnetovolume transition of LaFe11.8Si1.2....
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2016-10-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/1.4963840 |
| _version_ | 1819267916911083520 |
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| author | A. Waske E. Lovell A. Funk K. Sellschopp A. Rack L. Giebeler P. F. Gostin S. Fähler L. F. Cohen |
| author_facet | A. Waske E. Lovell A. Funk K. Sellschopp A. Rack L. Giebeler P. F. Gostin S. Fähler L. F. Cohen |
| author_sort | A. Waske |
| collection | DOAJ |
| description | First order magnetocaloric materials reach high entropy changes but at the same time exhibit hysteresis losses which depend on the sample’s microstructure. We use non-destructive 3D X-ray microtomography to understand the role of surface morphology for the magnetovolume transition of LaFe11.8Si1.2. The technique provides unique information on the spatial distribution of the volume change at the transition and its relationship with the surface morphology. Complementary Hall probe imaging confirms that on a morphologically complex surface minimization of strain energy dominates. Our findings sketch the way for a tailored surface morphology with low hysteresis without changing the underlying phase transition. |
| first_indexed | 2024-12-23T21:24:47Z |
| format | Article |
| id | doaj.art-608b80e125e64be39f4c4d6d06060621 |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-12-23T21:24:47Z |
| publishDate | 2016-10-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj.art-608b80e125e64be39f4c4d6d060606212022-12-21T17:30:38ZengAIP Publishing LLCAPL Materials2166-532X2016-10-01410106101106101-610.1063/1.4963840001610APMThe impact of surface morphology on the magnetovolume transition in magnetocaloric LaFe11.8Si1.2A. Waske0E. Lovell1A. Funk2K. Sellschopp3A. Rack4L. Giebeler5P. F. Gostin6S. Fähler7L. F. Cohen8IFW Dresden, P.O. 270116, 01171 Dresden, GermanyBlackett Laboratory, Imperial College London, SW7 2AZ London, United KingdomIFW Dresden, P.O. 270116, 01171 Dresden, GermanyIFW Dresden, P.O. 270116, 01171 Dresden, GermanyESRF - The European Synchrotron, CS 40220, 38043 Grenoble Cedex 9, FranceIFW Dresden, P.O. 270116, 01171 Dresden, GermanyIFW Dresden, P.O. 270116, 01171 Dresden, GermanyIFW Dresden, P.O. 270116, 01171 Dresden, GermanyBlackett Laboratory, Imperial College London, SW7 2AZ London, United KingdomFirst order magnetocaloric materials reach high entropy changes but at the same time exhibit hysteresis losses which depend on the sample’s microstructure. We use non-destructive 3D X-ray microtomography to understand the role of surface morphology for the magnetovolume transition of LaFe11.8Si1.2. The technique provides unique information on the spatial distribution of the volume change at the transition and its relationship with the surface morphology. Complementary Hall probe imaging confirms that on a morphologically complex surface minimization of strain energy dominates. Our findings sketch the way for a tailored surface morphology with low hysteresis without changing the underlying phase transition.http://dx.doi.org/10.1063/1.4963840 |
| spellingShingle | A. Waske E. Lovell A. Funk K. Sellschopp A. Rack L. Giebeler P. F. Gostin S. Fähler L. F. Cohen The impact of surface morphology on the magnetovolume transition in magnetocaloric LaFe11.8Si1.2 APL Materials |
| title | The impact of surface morphology on the magnetovolume transition in magnetocaloric LaFe11.8Si1.2 |
| title_full | The impact of surface morphology on the magnetovolume transition in magnetocaloric LaFe11.8Si1.2 |
| title_fullStr | The impact of surface morphology on the magnetovolume transition in magnetocaloric LaFe11.8Si1.2 |
| title_full_unstemmed | The impact of surface morphology on the magnetovolume transition in magnetocaloric LaFe11.8Si1.2 |
| title_short | The impact of surface morphology on the magnetovolume transition in magnetocaloric LaFe11.8Si1.2 |
| title_sort | impact of surface morphology on the magnetovolume transition in magnetocaloric lafe11 8si1 2 |
| url | http://dx.doi.org/10.1063/1.4963840 |
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