Giant low field magnetocaloric effect and magnetostructural coupling in MnCoGe1-xInx around room temperature

Tian Gao; Mei Wu; Ningning Qi; Tao Zhou; Xiaojing Luo; Yongsheng Liu; Kun Xu; Vyacheslav V. Marchenkov; Hongliang Dong; Zhiqiang Chen; Bin Chen

doi:10.1016/j.jallcom.2018.04.154

Giant low field magnetocaloric effect and magnetostructural coupling in MnCoGe_1-xIn_x around room temperature

Tian Gao^*
, Mei Wu
, Ningning Qi
, Tao Zhou
, Xiaojing Luo
, Yongsheng Liu
, Kun Xu
, Vyacheslav V. Marchenkov
, Hongliang Dong
, Zhiqiang Chen
, Bin Chen

^*Corresponding author for this work

Shanghai University of Electric Power
Qujing Normal University
Ural Federal University
Center for High Pressure Science & Technology Advanced Research

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

20 Scopus citations

Abstract

Effects on substitution of Ge by In on structural and magnetic properties are studied in MnCoGe_1-xIn_x compounds. A small amount of In (2% and 5%) dopant can shift the martensite transformation temperature to room temperature and make it overlap with Curie temperature window, which results in a spin-lattice coupling and a large conventional magnetocaloric effect. Giant values of magnetic entropy change (△S_M) are obtained in both magnetizing and demagnetizing processes in the vicinity of the magnetostructural transition. The maximum values of |△S_M| for MnCoGe_0.95In_0.05 reach 21.4 and 25.4 J/kg K for a small magnetic field change △H = 2–0 and 0–2 T, respectively, which make it promising for room temperature magnetic refrigeration applications.

Original language	English
Pages (from-to)	149-154
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	753
DOIs	https://doi.org/10.1016/j.jallcom.2018.04.154
State	Published - 15 Jul 2018
Externally published	Yes

Keywords

Magnetization curves
Magnetocaloric effect
Magnetostructural transitions
Martensitic transformations
MnCoGe alloys

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10.1016/j.jallcom.2018.04.154

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@article{01deaecd65c441b8aa8a5d416c97e10d,

title = "Giant low field magnetocaloric effect and magnetostructural coupling in MnCoGe1-xInx around room temperature",

abstract = "Effects on substitution of Ge by In on structural and magnetic properties are studied in MnCoGe1-xInx compounds. A small amount of In (2\% and 5\%) dopant can shift the martensite transformation temperature to room temperature and make it overlap with Curie temperature window, which results in a spin-lattice coupling and a large conventional magnetocaloric effect. Giant values of magnetic entropy change (△SM) are obtained in both magnetizing and demagnetizing processes in the vicinity of the magnetostructural transition. The maximum values of |△SM| for MnCoGe0.95In0.05 reach 21.4 and 25.4 J/kg K for a small magnetic field change △H = 2–0 and 0–2 T, respectively, which make it promising for room temperature magnetic refrigeration applications.",

keywords = "Magnetization curves, Magnetocaloric effect, Magnetostructural transitions, Martensitic transformations, MnCoGe alloys",

author = "Tian Gao and Mei Wu and Ningning Qi and Tao Zhou and Xiaojing Luo and Yongsheng Liu and Kun Xu and Marchenkov, \{Vyacheslav V.\} and Hongliang Dong and Zhiqiang Chen and Bin Chen",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = jul,

day = "15",

doi = "10.1016/j.jallcom.2018.04.154",

language = "英语",

volume = "753",

pages = "149--154",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Giant low field magnetocaloric effect and magnetostructural coupling in MnCoGe1-xInx around room temperature

AU - Gao, Tian

AU - Wu, Mei

AU - Qi, Ningning

AU - Zhou, Tao

AU - Luo, Xiaojing

AU - Liu, Yongsheng

AU - Xu, Kun

AU - Marchenkov, Vyacheslav V.

AU - Dong, Hongliang

AU - Chen, Zhiqiang

AU - Chen, Bin

PY - 2018/7/15

Y1 - 2018/7/15

N2 - Effects on substitution of Ge by In on structural and magnetic properties are studied in MnCoGe1-xInx compounds. A small amount of In (2% and 5%) dopant can shift the martensite transformation temperature to room temperature and make it overlap with Curie temperature window, which results in a spin-lattice coupling and a large conventional magnetocaloric effect. Giant values of magnetic entropy change (△SM) are obtained in both magnetizing and demagnetizing processes in the vicinity of the magnetostructural transition. The maximum values of |△SM| for MnCoGe0.95In0.05 reach 21.4 and 25.4 J/kg K for a small magnetic field change △H = 2–0 and 0–2 T, respectively, which make it promising for room temperature magnetic refrigeration applications.

AB - Effects on substitution of Ge by In on structural and magnetic properties are studied in MnCoGe1-xInx compounds. A small amount of In (2% and 5%) dopant can shift the martensite transformation temperature to room temperature and make it overlap with Curie temperature window, which results in a spin-lattice coupling and a large conventional magnetocaloric effect. Giant values of magnetic entropy change (△SM) are obtained in both magnetizing and demagnetizing processes in the vicinity of the magnetostructural transition. The maximum values of |△SM| for MnCoGe0.95In0.05 reach 21.4 and 25.4 J/kg K for a small magnetic field change △H = 2–0 and 0–2 T, respectively, which make it promising for room temperature magnetic refrigeration applications.

KW - Magnetization curves

KW - Magnetocaloric effect

KW - Magnetostructural transitions

KW - Martensitic transformations

KW - MnCoGe alloys

UR - https://www.scopus.com/pages/publications/85046011359

U2 - 10.1016/j.jallcom.2018.04.154

DO - 10.1016/j.jallcom.2018.04.154

M3 - 文章

AN - SCOPUS:85046011359

SN - 0925-8388

VL - 753

SP - 149

EP - 154

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Giant low field magnetocaloric effect and magnetostructural coupling in MnCoGe_1-xIn_x around room temperature

Abstract

Keywords

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