Microstructure formation and magnetocaloric effect of the Fe2P-type phase in (Mn,Fe)2(P, Si, B) alloys

J. W. Lai; Z. G. Zheng; B. W. Huang; H. Y. Yu; Z. G. Qiu; Y. L. Mao; S. Zhang; F. M. Xiao; D. C. Zeng; K. Goubitz; E. Brück

doi:10.1016/j.jallcom.2017.11.287

Microstructure formation and magnetocaloric effect of the Fe₂P-type phase in (Mn,Fe)₂(P, Si, B) alloys

J. W. Lai, Z. G. Zheng^*, B. W. Huang, H. Y. Yu, Z. G. Qiu, Y. L. Mao, S. Zhang, F. M. Xiao, D. C. Zeng, K. Goubitz, E. Brück

^*Corresponding author for this work

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

28 Citations (Scopus)

Abstract

The relation between the microstructure and the magnetic properties of Fe₂P-type (Mn,Fe)₂(P,Si,B) based materials has been systematically investigated by changing the annealing temperature and time. X-ray diffraction, Scanning Electron Microscopy and Energy Dispersive X-ray Spectroscopy measurements show that the alloys contain the main Fe₂P-type phase and two impurity phases of (Fe,Mn)₅Si₃-type and Fe₂MnSi-type. Boron appears to facilitate the formation of the Fe₂P-type phase during the arc-melting progress. Upon increasing the annealing temperatures from 1123 to 1423 K, the Curie temperature (T_C) decreases from 302.0 to 270.5 K in the Mn_1.15Fe_0.85P_0.55Si_0.45 alloys and the magnetic-entropy change (ΔS_M) increases linearly with annealing temperature. For the Mn_1.15Fe_0.85P_0.52Si_0.45B_0.03 alloys annealed at 1423 K for different times, T_C decreases from 263.8 and 232.8 K with increasing annealing time and ΔS_M reaches a maximum value after annealing for 48 h. The differences in the annealing temperature and time influence the Si content in the Fe₂P-type phase of the alloys and determine T_C, the thermal hysteresis and the magneto-elastic transition.

Original language	English
Pages (from-to)	2567-2573
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	735
DOIs	https://doi.org/10.1016/j.jallcom.2017.11.287
Publication status	Published - 2018

Keywords

(Mn,Fe)(P, Si, B)
Entropy
Magnetic properties
Magnetocaloric
Microstructure formation

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10.1016/j.jallcom.2017.11.287

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title = "Microstructure formation and magnetocaloric effect of the Fe2P-type phase in (Mn,Fe)2(P, Si, B) alloys",

abstract = "The relation between the microstructure and the magnetic properties of Fe2P-type (Mn,Fe)2(P,Si,B) based materials has been systematically investigated by changing the annealing temperature and time. X-ray diffraction, Scanning Electron Microscopy and Energy Dispersive X-ray Spectroscopy measurements show that the alloys contain the main Fe2P-type phase and two impurity phases of (Fe,Mn)5Si3-type and Fe2MnSi-type. Boron appears to facilitate the formation of the Fe2P-type phase during the arc-melting progress. Upon increasing the annealing temperatures from 1123 to 1423 K, the Curie temperature (TC) decreases from 302.0 to 270.5 K in the Mn1.15Fe0.85P0.55Si0.45 alloys and the magnetic-entropy change (ΔSM) increases linearly with annealing temperature. For the Mn1.15Fe0.85P0.52Si0.45B0.03 alloys annealed at 1423 K for different times, TC decreases from 263.8 and 232.8 K with increasing annealing time and ΔSM reaches a maximum value after annealing for 48 h. The differences in the annealing temperature and time influence the Si content in the Fe2P-type phase of the alloys and determine TC, the thermal hysteresis and the magneto-elastic transition.",

keywords = "(Mn,Fe)(P, Si, B), Entropy, Magnetic properties, Magnetocaloric, Microstructure formation",

author = "Lai, {J. W.} and Zheng, {Z. G.} and Huang, {B. W.} and Yu, {H. Y.} and Qiu, {Z. G.} and Mao, {Y. L.} and S. Zhang and Xiao, {F. M.} and Zeng, {D. C.} and K. Goubitz and E. Br{\"u}ck",

year = "2018",

doi = "10.1016/j.jallcom.2017.11.287",

language = "English",

volume = "735",

pages = "2567--2573",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier",

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TY - JOUR

T1 - Microstructure formation and magnetocaloric effect of the Fe2P-type phase in (Mn,Fe)2(P, Si, B) alloys

AU - Lai, J. W.

AU - Zheng, Z. G.

AU - Huang, B. W.

AU - Yu, H. Y.

AU - Qiu, Z. G.

AU - Mao, Y. L.

AU - Zhang, S.

AU - Xiao, F. M.

AU - Zeng, D. C.

AU - Goubitz, K.

AU - Brück, E.

PY - 2018

Y1 - 2018

N2 - The relation between the microstructure and the magnetic properties of Fe2P-type (Mn,Fe)2(P,Si,B) based materials has been systematically investigated by changing the annealing temperature and time. X-ray diffraction, Scanning Electron Microscopy and Energy Dispersive X-ray Spectroscopy measurements show that the alloys contain the main Fe2P-type phase and two impurity phases of (Fe,Mn)5Si3-type and Fe2MnSi-type. Boron appears to facilitate the formation of the Fe2P-type phase during the arc-melting progress. Upon increasing the annealing temperatures from 1123 to 1423 K, the Curie temperature (TC) decreases from 302.0 to 270.5 K in the Mn1.15Fe0.85P0.55Si0.45 alloys and the magnetic-entropy change (ΔSM) increases linearly with annealing temperature. For the Mn1.15Fe0.85P0.52Si0.45B0.03 alloys annealed at 1423 K for different times, TC decreases from 263.8 and 232.8 K with increasing annealing time and ΔSM reaches a maximum value after annealing for 48 h. The differences in the annealing temperature and time influence the Si content in the Fe2P-type phase of the alloys and determine TC, the thermal hysteresis and the magneto-elastic transition.

AB - The relation between the microstructure and the magnetic properties of Fe2P-type (Mn,Fe)2(P,Si,B) based materials has been systematically investigated by changing the annealing temperature and time. X-ray diffraction, Scanning Electron Microscopy and Energy Dispersive X-ray Spectroscopy measurements show that the alloys contain the main Fe2P-type phase and two impurity phases of (Fe,Mn)5Si3-type and Fe2MnSi-type. Boron appears to facilitate the formation of the Fe2P-type phase during the arc-melting progress. Upon increasing the annealing temperatures from 1123 to 1423 K, the Curie temperature (TC) decreases from 302.0 to 270.5 K in the Mn1.15Fe0.85P0.55Si0.45 alloys and the magnetic-entropy change (ΔSM) increases linearly with annealing temperature. For the Mn1.15Fe0.85P0.52Si0.45B0.03 alloys annealed at 1423 K for different times, TC decreases from 263.8 and 232.8 K with increasing annealing time and ΔSM reaches a maximum value after annealing for 48 h. The differences in the annealing temperature and time influence the Si content in the Fe2P-type phase of the alloys and determine TC, the thermal hysteresis and the magneto-elastic transition.

KW - (Mn,Fe)(P, Si, B)

KW - Entropy

KW - Magnetic properties

KW - Magnetocaloric

KW - Microstructure formation

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U2 - 10.1016/j.jallcom.2017.11.287

DO - 10.1016/j.jallcom.2017.11.287

M3 - Article

AN - SCOPUS:85042765983

SN - 0925-8388

VL - 735

SP - 2567

EP - 2573

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Microstructure formation and magnetocaloric effect of the Fe₂P-type phase in (Mn,Fe)₂(P, Si, B) alloys

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