Large recalescence-like event at the first cooling across the magnetic transition of (Mn,Fe)2(P,Si) magnetocaloric materials

F. Guillou; H. Yibole; Z. Q. Ou; E. Brück; O. Tegus

doi:10.1016/j.scriptamat.2018.10.002

Large recalescence-like event at the first cooling across the magnetic transition of (Mn,Fe)₂(P,Si) magnetocaloric materials

F. Guillou, H. Yibole^*, Z. Q. Ou, E. Brück, O. Tegus

^*Corresponding author for this work

RST/Fundamental Aspects of Materials and Energy

Research output: Contribution to journal › Article › Scientific › peer-review

9 Citations (Scopus)

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.

Original language	English
Pages (from-to)	81-85
Journal	Scripta Materialia
Volume	160
DOIs	https://doi.org/10.1016/j.scriptamat.2018.10.002
Publication status	Published - 2019

Keywords

Magnetic properties
Metals and alloys
Microstructure
Phase transitions
Undercooling

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10.1016/j.scriptamat.2018.10.002

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title = "Large recalescence-like event at the first cooling across the magnetic transition of (Mn,Fe)2(P,Si) magnetocaloric materials",

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.",

keywords = "Magnetic properties, Metals and alloys, Microstructure, Phase transitions, Undercooling",

author = "F. Guillou and H. Yibole and Ou, {Z. Q.} and E. Br{\"u}ck and O. Tegus",

year = "2019",

doi = "10.1016/j.scriptamat.2018.10.002",

language = "English",

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pages = "81--85",

journal = "Scripta Materialia",

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TY - JOUR

T1 - Large recalescence-like event at the first cooling across the magnetic transition of (Mn,Fe)2(P,Si) magnetocaloric materials

AU - Guillou, F.

AU - Yibole, H.

AU - Ou, Z. Q.

AU - Brück, E.

AU - Tegus, O.

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

KW - Magnetic properties

KW - Metals and alloys

KW - Microstructure

KW - Phase transitions

KW - Undercooling

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U2 - 10.1016/j.scriptamat.2018.10.002

DO - 10.1016/j.scriptamat.2018.10.002

M3 - Article

AN - SCOPUS:85054162356

SN - 1359-6462

VL - 160

SP - 81

EP - 85

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Large recalescence-like event at the first cooling across the magnetic transition of (Mn,Fe)₂(P,Si) magnetocaloric materials

Abstract

Keywords

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