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Large recalescence-like event at the first cooling across the magnetic transition of (Mn,Fe)2(P,Si) magnetocaloric materials.
- Source :
-
Scripta Materialia . Feb2019, Vol. 160, p81-85. 5p. - Publication Year :
- 2019
-
Abstract
- Abstract An unconventional phenomena is observed at the first-order magnetic transitions in (Mn,Fe) 2 (P,Si) materials. Here, we show that the first crossing of the transition upon cooling is associated with an abnormal temperature increase. While differential scanning calorimetry can detect this recalescence-like event, purposely-designed probes were employed to quantify it. Recalescence at a magnetic transition is extremely rare. But in (Mn,Fe) 2 (P,Si), it is even more remarkable by its amplitude, with the temperature rising up to +4.0 K. In (Mn,Fe) 2 (P,Si), this phenomenon is associated with irreversible burst-like evolution of the microstructure (increase in defect concentration and micro-cracking) and of the crystal structure. Graphical abstract Unlabelled Image [ABSTRACT FROM AUTHOR]
- Subjects :
- *PHASE transitions
*MAGNETIC properties
*MICROSTRUCTURE
*METALS
*ALLOYS
*SUPERCOOLING
Subjects
Details
- Language :
- English
- ISSN :
- 13596462
- Volume :
- 160
- Database :
- Academic Search Index
- Journal :
- Scripta Materialia
- Publication Type :
- Academic Journal
- Accession number :
- 132486693
- Full Text :
- https://doi.org/10.1016/j.scriptamat.2018.10.002