Enhanced low-field magnetocaloric effect in Nb and Al co-substituted EuTiO3 compounds

Huicai Xie; Wenxia Su; Haiming Lu; Zhaojun Mo; Dunhui Wang; Hao Sun; Lu tian; Xinqiang Gao; Zhenxing Li; Jun Shen

doi:10.1016/j.jmst.2022.02.005

Enhanced low-field magnetocaloric effect in Nb and Al co-substituted EuTiO₃ compounds

Huicai Xie, Wenxia Su, Haiming Lu, Zhaojun Mo^*, Dunhui Wang, Hao Sun, Lu tian, Xinqiang Gao, Zhenxing Li, Jun Shen

^*Corresponding author for this work

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

48 Citations (Scopus)

Abstract

The magnetic ground state switching between antiferromagnetic (AFM) and ferromagnetic (FM) states in EuTiO₃ provides the feasibility of regulating its magnetic properties and magnetocaloric effect. First-principles calculations demonstrate that the magnetic ground states for EuTi_0.875Nb_0.0625Al_0.0625O₃, EuTi_0.8125Nb_0.125Al_0.0625O₃, and EuTi_0.75Nb_0.125Al_0.125O₃ are FM coupling. Experimental results also exhibit the FM coupling domination in these compounds, accompanied by a significantly enhanced low magnetic field magnetocaloric effect. The maximum magnetic entropy change of all the samples surpasses 15 J kg⁻¹ K⁻¹ with a field change of 1 T, which is 1.4 times as large as that of bulk EuTiO₃. Especially, the maximum refrigerating capacity for EuTi_0.8125Nb_0.125Al_0.0625O₃ compound is evaluated to be 88.1 J kg⁻¹, more than three times of that of EuTiO₃. The remarkable magnetocaloric performances prove Nb and Al co-substituted EuTiO₃ compounds to be competitive candidates for magnetic refrigeration in the liquid helium temperature regime.

Original language	English
Pages (from-to)	128-135
Number of pages	8
Journal	Journal of Materials Science and Technology
Volume	118
DOIs	https://doi.org/10.1016/j.jmst.2022.02.005
Publication status	Published - 10 Aug 2022
Externally published	Yes

Keywords

Europium titanate (EuTiO)
Ferromagnetic
Magnetic refrigeration
Magnetocaloric effect

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10.1016/j.jmst.2022.02.005

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title = "Enhanced low-field magnetocaloric effect in Nb and Al co-substituted EuTiO3 compounds",

abstract = "The magnetic ground state switching between antiferromagnetic (AFM) and ferromagnetic (FM) states in EuTiO3 provides the feasibility of regulating its magnetic properties and magnetocaloric effect. First-principles calculations demonstrate that the magnetic ground states for EuTi0.875Nb0.0625Al0.0625O3, EuTi0.8125Nb0.125Al0.0625O3, and EuTi0.75Nb0.125Al0.125O3 are FM coupling. Experimental results also exhibit the FM coupling domination in these compounds, accompanied by a significantly enhanced low magnetic field magnetocaloric effect. The maximum magnetic entropy change of all the samples surpasses 15 J kg−1 K−1 with a field change of 1 T, which is 1.4 times as large as that of bulk EuTiO3. Especially, the maximum refrigerating capacity for EuTi0.8125Nb0.125Al0.0625O3 compound is evaluated to be 88.1 J kg−1, more than three times of that of EuTiO3. The remarkable magnetocaloric performances prove Nb and Al co-substituted EuTiO3 compounds to be competitive candidates for magnetic refrigeration in the liquid helium temperature regime.",

keywords = "Europium titanate (EuTiO), Ferromagnetic, Magnetic refrigeration, Magnetocaloric effect",

author = "Huicai Xie and Wenxia Su and Haiming Lu and Zhaojun Mo and Dunhui Wang and Hao Sun and Lu tian and Xinqiang Gao and Zhenxing Li and Jun Shen",

note = "Publisher Copyright: {\textcopyright} 2022",

year = "2022",

month = aug,

day = "10",

doi = "10.1016/j.jmst.2022.02.005",

language = "English",

volume = "118",

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journal = "Journal of Materials Science and Technology",

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TY - JOUR

T1 - Enhanced low-field magnetocaloric effect in Nb and Al co-substituted EuTiO3 compounds

AU - Xie, Huicai

AU - Su, Wenxia

AU - Lu, Haiming

AU - Mo, Zhaojun

AU - Wang, Dunhui

AU - Sun, Hao

AU - tian, Lu

AU - Gao, Xinqiang

AU - Li, Zhenxing

AU - Shen, Jun

PY - 2022/8/10

Y1 - 2022/8/10

N2 - The magnetic ground state switching between antiferromagnetic (AFM) and ferromagnetic (FM) states in EuTiO3 provides the feasibility of regulating its magnetic properties and magnetocaloric effect. First-principles calculations demonstrate that the magnetic ground states for EuTi0.875Nb0.0625Al0.0625O3, EuTi0.8125Nb0.125Al0.0625O3, and EuTi0.75Nb0.125Al0.125O3 are FM coupling. Experimental results also exhibit the FM coupling domination in these compounds, accompanied by a significantly enhanced low magnetic field magnetocaloric effect. The maximum magnetic entropy change of all the samples surpasses 15 J kg−1 K−1 with a field change of 1 T, which is 1.4 times as large as that of bulk EuTiO3. Especially, the maximum refrigerating capacity for EuTi0.8125Nb0.125Al0.0625O3 compound is evaluated to be 88.1 J kg−1, more than three times of that of EuTiO3. The remarkable magnetocaloric performances prove Nb and Al co-substituted EuTiO3 compounds to be competitive candidates for magnetic refrigeration in the liquid helium temperature regime.

AB - The magnetic ground state switching between antiferromagnetic (AFM) and ferromagnetic (FM) states in EuTiO3 provides the feasibility of regulating its magnetic properties and magnetocaloric effect. First-principles calculations demonstrate that the magnetic ground states for EuTi0.875Nb0.0625Al0.0625O3, EuTi0.8125Nb0.125Al0.0625O3, and EuTi0.75Nb0.125Al0.125O3 are FM coupling. Experimental results also exhibit the FM coupling domination in these compounds, accompanied by a significantly enhanced low magnetic field magnetocaloric effect. The maximum magnetic entropy change of all the samples surpasses 15 J kg−1 K−1 with a field change of 1 T, which is 1.4 times as large as that of bulk EuTiO3. Especially, the maximum refrigerating capacity for EuTi0.8125Nb0.125Al0.0625O3 compound is evaluated to be 88.1 J kg−1, more than three times of that of EuTiO3. The remarkable magnetocaloric performances prove Nb and Al co-substituted EuTiO3 compounds to be competitive candidates for magnetic refrigeration in the liquid helium temperature regime.

KW - Europium titanate (EuTiO)

KW - Ferromagnetic

KW - Magnetic refrigeration

KW - Magnetocaloric effect

UR - https://www.scopus.com/pages/publications/85125625310

U2 - 10.1016/j.jmst.2022.02.005

DO - 10.1016/j.jmst.2022.02.005

M3 - Article

AN - SCOPUS:85125625310

SN - 1005-0302

VL - 118

SP - 128

EP - 135

JO - Journal of Materials Science and Technology

JF - Journal of Materials Science and Technology

ER -

Enhanced low-field magnetocaloric effect in Nb and Al co-substituted EuTiO₃ compounds

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Keywords

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