Magnetovolume effect in the exchange-enhanced itinerant paramagnet YCo2: Theory and experiment

Zhuravleva, I.; Grechnev, G. E.; Панфилов, А. С.; Lyogenkaya, A. A.

doi:10.1063/1.4985217

Cited by 5 publications

(3 citation statements)

References 18 publications

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“…In 0.01 [99] 两种合金马氏相变过程中表现出显著不同的晶格畸变(图21(a), (c) Laves相金属间化合物RCo 2 (R为稀土)由于大的磁热效应(MCE)为人们所熟知 [77,101,102] . 特别是, ErCo 2 被认为是低温区最具 [103] 代表性的MCE 材料, 居里温度 K, 0 -5 T下的磁熵变高达 J/(kg•K) [77] . R +3 的高磁矩和T C 附近大的晶格畸变被认为是巨大MCE的来源.…”

Section: 进一步研究发现无公度圆锥螺旋磁结构的unclassified

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Phase transition regulation, magnetocaloric effect, and abnormal thermal expansion

Lin,

Hu,

Shen

2023

Acta Phys. Sin.

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As a common phenomenon in nature, phase transition has caught people’s attention for a long time. Thus, it has been applied to various fields, such as refrigeration, information and energy storage, and negative thermal expansion. With the virtues of environmental friendliness, high efficiency, noiselessness and easy miniaturization, solid refrigeration technique based on magnetocaloric, electrocaloric, and mechanocaloric effects, is a promising candidate to replace vapor compression technique. Among them, magnetocaloric effect has the longest research history. However, the shortcomings of magnetocaloric effect driven by a single magnetic field limit its solid-state refrigeration application, such as insufficient amplitude of caloric effect, large hysteresis loss, and narrow refrigeration temperature span. To solve these problems, multifield tuning and multicaloric effect came into people's sight. This review introduces our recent research on improving the caloric effect by applying multifield, such as boosting the entropy change, enlarging the transition temperature span, tuning the transition temperature, and lowering the hysteresis losses. Meanwhile, the thermodynamics of multifield and coupled-caloric effect is presented. On the other hand, abnormal thermal expansion (zero thermal expansion, negative thermal expansion) materials have important applications in precision manufacturing. The phase transition and lattice effect dominated by magnetic atoms in the giant magnetocaloric materials with strong magnetic-crystal coupling provide an ideal platform for exploring abnormal thermal expansion. This review also introduces our recent research on abnormal thermal expansion in magnetocaloric materials and prospects relevant research in future.

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Section: 进一步研究发现无公度圆锥螺旋磁结构的unclassified

“…相反, 当磁性稀土元素占据R位时, 4f和3d电子间的交换相互作用诱导Co磁矩. 对于重稀土(Gd, Tb, Dy, Ho, Er), R和Co之间的交换耦合导致亚铁磁性(FIM), 而轻稀土元素导致铁磁性(FM) [103] .…”

Section: 进一步研究发现无公度圆锥螺旋磁结构的unclassified

Phase transition regulation, magnetocaloric effect, and abnormal thermal expansion

Lin,

Hu,

Shen

2023

Acta Phys. Sin.

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“…Furthermore, YCo 2 alloys with rare-earth elements R 1−x Y x Co 2 (R = Er, Gd) were investigated as magnetocaloric materials for application in magnetic refrigerators [8,9], similar like Er 1−x Zr x Fe 2 alloys [10]. The above efforts are supplemented by a number of theoretical studies of mechanical [11], electronic [12], and magn etic properties [13,14] concerning ZrFe 2 , YCo 2 , and ZrCo 2 compounds. The binary XFe 2 and XCo 2 phases (including X = Y, Zr) have been also investigated theoretically from a permanent magnets perspective [15].…”

Section: Introductionmentioning

confidence: 99%

Curie temperature study of ${{\rm Y(Fe_{1-\it x}} {\rm {Co}_{\it x})_2}}$ and ${{\rm Zr(Fe_{1-\it x}} {\rm {Co}_{\it x})_2}}$ systems using mean field theory and Monte Carlo method

Wasilewski

Marciniak

Werwiński

2018

J. Phys. D: Appl. Phys.

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Cubic Laves phases including , , , and are considered as promising candidates for application in hydrogen storage and magnetic refrigeration. While and are ferromagnets, alloying with Co decreases magnetic moments and Curie temperatures (TC) of pseudobinary and systems, leading to the paramagnetic states of and . The following study focuses on the investigation of Curie temperature of the and system from first principles. To do it, Monte Carlo (MC) simulations and the mean field theory (MFT) based on the disordered local moments (DLM) calculations are used. The DLM-MFT results agree qualitatively with the experimental data from the literature and preserve the characteristic features of dependencies for both and . However, we have encountered complications in the Co-rich regions due to failure of the local density approximation (LDA) in describing the Co magnetic moment in the DLM state. The analysis of Fe–Fe exchange couplings for and phases indicates that the nearest-neighbor interactions play the main role in the formation of .

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Exploring the electronic, magnetic, and elastic properties of binary AB2 (A = Sc, Y, and La; B = Fe, Co, and Ni) intermetallics: First-principles study

Ara,

Ali,

Gul

et al. 2023

Materials Science and Engineering: B

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Magnetovolume effect in the exchange-enhanced itinerant paramagnet YCo2: Theory and experiment

Cited by 5 publications

References 18 publications

Phase transition regulation, magnetocaloric effect, and abnormal thermal expansion

Phase transition regulation, magnetocaloric effect, and abnormal thermal expansion

Curie temperature study of ${{\rm Y(Fe_{1-\it x}} {\rm {Co}_{\it x})_2}}$ and ${{\rm Zr(Fe_{1-\it x}} {\rm {Co}_{\it x})_2}}$ systems using mean field theory and Monte Carlo method

Exploring the electronic, magnetic, and elastic properties of binary AB2 (A = Sc, Y, and La; B = Fe, Co, and Ni) intermetallics: First-principles study

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