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

Mo, Zhaojun; Sun, Qilei; Han, Shen; Zhao, Yan; Chen, Xing; Li, Lan; Liu, Guodong; Meng, Fanbin; Shen, Jun

doi:10.1016/j.jmmm.2018.02.012

Cited by 14 publications

(8 citation statements)

References 31 publications

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“…图 9 (网络版彩图) TmGa在不同磁场下的磁熵变化曲线 [42] Figure 9 (Color online) The magnetic entropy change curve of TmGa in different magnetic fields [42]. [65][66][67][68][69][70][71] 、稀土锰氧化物 [72] 和稀土钒氧化物 [73] 等. [56] Figure 10 (Color online) The magnetic entropy change curve of TmCuAl in different magnetic fields [56].…”

Section: J Kgmentioning

confidence: 99%

Development of magnetic refrigeration materials andtechnology

Shen¹,

Mo²,

Li³

et al. 2021

Sci. Sin.-Phys. Mech. Astron.

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Section: J Kgmentioning

confidence: 99%

Development of magnetic refrigeration materials andtechnology

Shen¹,

Mo²,

Li³

et al. 2021

Sci. Sin.-Phys. Mech. Astron.

Self Cite

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“…A few contain precious Rh (e.g., FeRh [24,222,278,279] and Tb 3 Rh [270]). Many contain critical rare earth, such as Eu in Eu 2 In [140], EuTiO 3 [114,135,156,195] doped with Al [113], Cr [196], Mn [134], Co [151], Ni [119], Ba [157,206], Nb [110,170,195] and Eu in other compounds [133,232,240,251]; Gd in GdAlO 3 [158], GdFeO 3 [138,162], GdCrO 3 [183], GdCrO 4 -ErCrO 4 [202], GdScO 3 [117,124], Gd 2 CoMnO 6 [155], Gd 2 BaNiO 5 [152], GdCrTiO 5 [143], GdCo 2 B 2 [271], GdCoC 2 [171], RuSr 2 GdCu 2 O 8 [208], etc. ; Tb in TbFeO 3 [176], TbMn 2 O 5 [179], Tb 2 CoMnO 6 [132], Tb 5 Ge 2−x Si 2−x Mn 2x [255], Tb 4 Gd 1 Si 2.035 Ge 1.935 Mn 0.03 [197], etc.…”

Section: ∆S T T C (K) ∆T S (K)mentioning

confidence: 99%

Viable Materials with a Giant Magnetocaloric Effect

Zarkevich

Zverev

2020

Crystals

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This review of the current state of magnetocalorics is focused on materials exhibiting a giant magnetocaloric response near room temperature. To be economically viable for industrial applications and mass production, materials should have desired useful properties at a reasonable cost and should be safe for humans and the environment during manufacturing, handling, operational use, and after disposal. The discovery of novel materials is followed by a gradual improvement of properties by compositional adjustment and thermal or mechanical treatment. Consequently, with time, good materials become inferior to the best. There are several known classes of inexpensive materials with a giant magnetocaloric effect, and the search continues.

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“…The dopants at A-site included alkaline-earths, such as Sr, Ba and Ca [ 10 , 13 , 14 , 15 , 16 , 17 ], as well as rare-earths other than Eu (e.g., La, Ce and Sm) [ 17 , 18 ], whereas the dopants at B-site were mainly transition metals (TMs) (e.g., Cr, Ni, Mn, Fe, Co, Nb, Zr, etc.) [ 19 , 20 , 21 , 22 , 23 , 24 ] and a few main group-III elements (e.g., Al and Ga) [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Cation Valences and Multiferroic Properties of EuTiO3 Co-Doped with Ba and Transition Metals of Co/Ni

Lin

2022

Materials

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Eu1−xBaxTi1−yMyO3 (M = Co or Ni) was sintered at 1400 °C under a reduction atmosphere. X-ray photoelectron spectroscopy revealed the mixed valences of Eu2+/Eu3+ and Ti4+/Ti3+ in EuTiO3 and Eu0.7Ba0.3TiO3, as well as some oxygen vacancies required to keep the charge neutrality. The co-doping of Co2+/Ni2+ in Eu0.7Ba0.3TiO3 resulted in the disappearance of oxygen vacancies, as a result of a reduction in Ti3+ numbers and an increase in Eu3+ numbers. On the other hand, Ba2+ doping led to an increased lattice parameter due to its larger ionic size than Eu2+, whereas the Co2+/Ni2+ co-doping resulted in smaller lattice parameters because of the combined effects of ionic size and variation in the oxygen-vacancy numbers. Eu0.7Ba0.3TiO3 exhibited a clear ferroelectricity, which persisted in the Co2+/Ni2+ co-doped samples until the doping levels of y = 0.05 and 0.10, respectively. Eu0.7Ba0.3TiO3 remained to be antiferromagnetic with a reduced transition temperature of 3.1 K, but co-doping of Co2+/Ni2+ turned the samples from antiferromagnetic to ferromagnetic with transition temperatures of 2.98 K and 2.72 K, respectively. The cause for such a transition could not be explained by the larger lattice volume, oxygen vacancies and mixed valences of Eu2+/Eu3+, which were proposed in previous works. Instead, it was more likely to arise from a large asymmetric distortion of the Eu–O polyhedron introduced by the aliovalent doping, which promotes the admixture of Eu 5d and 4f states.

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

Cited by 14 publications

References 31 publications

Development of magnetic refrigeration materials andtechnology

Development of magnetic refrigeration materials andtechnology

Viable Materials with a Giant Magnetocaloric Effect

Cation Valences and Multiferroic Properties of EuTiO3 Co-Doped with Ba and Transition Metals of Co/Ni

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