Journal
NATURE COMMUNICATIONS
Volume 9, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-05111-w
Keywords
-
Categories
Funding
- MINECO
- EU FEDER [MAT2013-45165-P]
- AEI/FEDER-UE [MAT-2016-77265-R]
- PAI of the Regional Government of Andalucia
- Deutscher Akademischer Austauschdienst DAAD [A/13/09434]
- FPU fellowship from the Spanish MECD
- European Research Council (ERC) under the European Union Horizon 2020 research and innovation programme [743116]
- DFG [SPP 1599]
- Russian Science Foundation [18-42-06201] Funding Source: Russian Science Foundation
Ask authors/readers for more resources
The ideal magnetocaloric material would lay at the borderline of a first-order and a second-order phase transition. Hence, it is crucial to unambiguously determine the order of phase transitions for both applied magnetocaloric research as well as the characterization of other phase change materials. Although Ehrenfest provided a conceptually simple definition of the order of a phase transition, the known techniques for its determination based on magnetic measurements either provide erroneous results for specific cases or require extensive data analysis that depends on subjective appreciations of qualitative features of the data. Here we report a quantitative fingerprint of first-order thermomagnetic phase transitions: the exponent n from field dependence of magnetic entropy change presents a maximum of n > 2 only for first-order thermomagnetic phase transitions. This model-independent parameter allows evaluating the order of phase transition without any subjective interpretations, as we show for different types of materials and for the Bean-Rodbell model.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available