Effects of Mn-doping on the giant magnetocaloric effect of EuTiO3 compound

Zhao Jun Mo; Qi Lei Sun; Sheng Han; Yun Zhao; Xing Chen; Lan Li; Guo Dong Liu; Fan Bin Meng; Jun Shen

doi:10.1016/j.jmmm.2018.02.012

Effects of Mn-doping on the giant magnetocaloric effect of EuTiO₃ compound

Zhao Jun Mo^*
, Qi Lei Sun
, Sheng Han
, Yun Zhao
, Xing Chen
, Lan Li
, Guo Dong Liu
, Fan Bin Meng
, Jun Shen

^*Corresponding author for this work

Tianjin University of Technology
Hebei University of Technology
CAS - Technical Institute of Physics and Chemistry

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

20 Citations (Scopus)

Abstract

The magnetic properties and magnetocaloric effect of EuTi_1−xMn_xO₃ (x = 0–0.1) compounds are investigated. When the Ti⁴⁺ was substituted by Mn²⁺, the lattice constants were changed, the Eu³⁺ state and the oxygen vacancy generated. The exchange mechanisms were more complex among the Mn²⁺ 3d, the Eu 5d and Eu²⁺ 4f. The FM phase was dominant between AFM and FM as Mn substitute for Ti, which improve the MCE under low magnetic field. The values of −ΔS_M^max are evaluated to 11.7 and 11.1 J/kg K for EuTi_0.975Mn_0.025O₃ and EuTi_0.95Mn_0.05O₃ compounds, under a magnetic field change of 1 T. And, the values of RC were obviously enhanced under the magnetic field changes of 1 and 2 T. Therefore, the giant reversible MCE makes these compounds promising candidates for magnetic refrigeration.

Original language	English
Pages (from-to)	31-37
Number of pages	7
Journal	Journal of Magnetism and Magnetic Materials
Volume	456
DOIs	https://doi.org/10.1016/j.jmmm.2018.02.012
Publication status	Published - 15 Jun 2018
Externally published	Yes

Keywords

Magnetic entropy change
Magnetic phase transformation
Magnetocaloric effect

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10.1016/j.jmmm.2018.02.012

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title = "Effects of Mn-doping on the giant magnetocaloric effect of EuTiO3 compound",

abstract = "The magnetic properties and magnetocaloric effect of EuTi1−xMnxO3 (x = 0–0.1) compounds are investigated. When the Ti4+ was substituted by Mn2+, the lattice constants were changed, the Eu3+ state and the oxygen vacancy generated. The exchange mechanisms were more complex among the Mn2+ 3d, the Eu 5d and Eu2+ 4f. The FM phase was dominant between AFM and FM as Mn substitute for Ti, which improve the MCE under low magnetic field. The values of −ΔSMmax are evaluated to 11.7 and 11.1 J/kg K for EuTi0.975Mn0.025O3 and EuTi0.95Mn0.05O3 compounds, under a magnetic field change of 1 T. And, the values of RC were obviously enhanced under the magnetic field changes of 1 and 2 T. Therefore, the giant reversible MCE makes these compounds promising candidates for magnetic refrigeration.",

keywords = "Magnetic entropy change, Magnetic phase transformation, Magnetocaloric effect",

author = "Mo, \{Zhao Jun\} and Sun, \{Qi Lei\} and Sheng Han and Yun Zhao and Xing Chen and Lan Li and Liu, \{Guo Dong\} and Meng, \{Fan Bin\} and Jun Shen",

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

year = "2018",

month = jun,

day = "15",

doi = "10.1016/j.jmmm.2018.02.012",

language = "English",

volume = "456",

pages = "31--37",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

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TY - JOUR

T1 - Effects of Mn-doping on the giant magnetocaloric effect of EuTiO3 compound

AU - Mo, Zhao Jun

AU - Sun, Qi Lei

AU - Han, Sheng

AU - Zhao, Yun

AU - Chen, Xing

AU - Li, Lan

AU - Liu, Guo Dong

AU - Meng, Fan Bin

AU - Shen, Jun

PY - 2018/6/15

Y1 - 2018/6/15

N2 - The magnetic properties and magnetocaloric effect of EuTi1−xMnxO3 (x = 0–0.1) compounds are investigated. When the Ti4+ was substituted by Mn2+, the lattice constants were changed, the Eu3+ state and the oxygen vacancy generated. The exchange mechanisms were more complex among the Mn2+ 3d, the Eu 5d and Eu2+ 4f. The FM phase was dominant between AFM and FM as Mn substitute for Ti, which improve the MCE under low magnetic field. The values of −ΔSMmax are evaluated to 11.7 and 11.1 J/kg K for EuTi0.975Mn0.025O3 and EuTi0.95Mn0.05O3 compounds, under a magnetic field change of 1 T. And, the values of RC were obviously enhanced under the magnetic field changes of 1 and 2 T. Therefore, the giant reversible MCE makes these compounds promising candidates for magnetic refrigeration.

AB - The magnetic properties and magnetocaloric effect of EuTi1−xMnxO3 (x = 0–0.1) compounds are investigated. When the Ti4+ was substituted by Mn2+, the lattice constants were changed, the Eu3+ state and the oxygen vacancy generated. The exchange mechanisms were more complex among the Mn2+ 3d, the Eu 5d and Eu2+ 4f. The FM phase was dominant between AFM and FM as Mn substitute for Ti, which improve the MCE under low magnetic field. The values of −ΔSMmax are evaluated to 11.7 and 11.1 J/kg K for EuTi0.975Mn0.025O3 and EuTi0.95Mn0.05O3 compounds, under a magnetic field change of 1 T. And, the values of RC were obviously enhanced under the magnetic field changes of 1 and 2 T. Therefore, the giant reversible MCE makes these compounds promising candidates for magnetic refrigeration.

KW - Magnetic entropy change

KW - Magnetic phase transformation

KW - Magnetocaloric effect

UR - https://www.scopus.com/pages/publications/85041699231

U2 - 10.1016/j.jmmm.2018.02.012

DO - 10.1016/j.jmmm.2018.02.012

M3 - Article

AN - SCOPUS:85041699231

SN - 0304-8853

VL - 456

SP - 31

EP - 37

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

ER -

Effects of Mn-doping on the giant magnetocaloric effect of EuTiO₃ compound

Abstract

Keywords

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