Magnetic properties and large magnetic entropy change in rare earth-rich cadmium compounds of RE4CoCd (RE = Tm and Ho)

The most extensive cooling techniques based on gases have faced environmental problems. The magnetic refrigeration is an alternative technology based on magnetocaloric effect. HoN nanoparticles are good refrigerant material at low temperature.

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Magnetic properties of the non-stoichiometric TbCo2Nix alloys

EPJ Web of Conferences ◽

10.1051/epjconf/201818504021 ◽

2018 ◽

Vol 185 ◽

pp. 04021

Author(s):

Alexander Inishev ◽

Evgeny Gerasimov ◽

Nikolay Mushnikov ◽

Pavel Terentev ◽

Vasily Gaviko

Keyword(s):

Magnetic Properties ◽

Curie Temperature ◽

Concentration Dependence ◽

Magnetic Moment ◽

Magnetic Entropy Change ◽

Entropy Change ◽

Magnetic Entropy ◽

Thermodynamic Relation ◽

Temperature Dependences

The magnetic and magnetothermal properties of the non-stoichiometric TbCo2Nix (0 ≤ x ≤ 0.2) alloys were studied. It was found that the concentration dependence of the Curie temperature and magnetic moment of the 3d-sublattice have a maximum at x = 0.025. The obtained experimental magnetic properties of the TbCo2Nix alloys were discussed under assumption that the Co magnetic moment in the compounds changes with increasing x. The magnetic entropy change was determined using the temperature dependences of the magnetization and Maxwell’s thermodynamic relation. The obtained results for TbCo2Nix were compared with those for the ErCo2Mnx alloys.

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Magnetic properties and magnetic entropy change of perovskite manganites La0.9–Eu Sr0.1MnO3 (x=0.000, 0.075) by experimental method and numerical fitting

Journal of Rare Earths ◽

10.1016/j.jre.2018.10.013 ◽

2019 ◽

Vol 37 (6) ◽

pp. 622-627 ◽

Cited By ~ 3

Author(s):

Xiang Jin ◽

Jianjun Zhao ◽

Hongye Wu ◽

Bao Xu ◽

Yunbin Sun ◽

...

Keyword(s):

Magnetic Properties ◽

Experimental Method ◽

Magnetic Entropy Change ◽

Entropy Change ◽

Perovskite Manganites ◽

Magnetic Entropy ◽

Numerical Fitting

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Effect of Crystal Size on the Magnetic Entropy Change in CoCr2O4

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.121-123.889 ◽

2007 ◽

Vol 121-123 ◽

pp. 889-892 ◽

Cited By ~ 3

Author(s):

Shang Dong Li ◽

Zhi Gao Huang ◽

Guo Xia Zhao ◽

Wen Qin Zou ◽

You Liao Zheng ◽

...

Keyword(s):

Magnetic Properties ◽

Size Effect ◽

Magnetic Entropy Change ◽

Crystal Size ◽

Nanocrystalline Material ◽

Bulk Material ◽

Entropy Change ◽

The Other ◽

Magnetic Entropy ◽

Two Samples

The size effect of magnetocaloric effect (MCE) in CoCr2O4 has been investigated by comparing two samples with different crystal sizes. One is bulk CoCr2O4 sample (referred as A), and the other is a nanocrystalline CoCr2O4 sample (referred as B). It has been found that crystal size dramatically affects the magnetic properties and MCE for CoCr2O4, and that the nanocrystalline material is more favorable for application than the bulk material. The above results are explained in terms of the effect of small size and its distribution for sample B on the intrinsic magnetic properties and magnetic entropy change.

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Magnetocaloric Effects of Binary Rare Earth Nitrides

MRS Proceedings ◽

10.1557/proc-1040-q09-05 ◽

2007 ◽

Vol 1040 ◽

Author(s):

Yusuke Hirayama ◽

Takashi Nakagawa ◽

Takafumi Kusunose ◽

Takao A. Yamamoto

Keyword(s):

Rare Earth ◽

Carbothermic Reduction ◽

Maxwell Equations ◽

Magnetic Entropy Change ◽

Reduction Method ◽

Entropy Change ◽

Convex Curve ◽

Data Sets ◽

Magnetic Entropy ◽

Rare Earth Nitrides

AbstractWe synthesized HoxEr1−xN (x =0.1, 0.3, 0.5, 0.7, 0.9) by the carbothermic reduction method. The magnetic entropy change, ΔS, which is an indicator of performance of magnetocaloric effect, MCE, was obtained from data sets of magnetization M (H, T) measured at various temperature, T, and magnetic field, H, through the Maxwell equations. The Thus obtained ΔS vs. T curves have peaks at temperatures depending on x in a range of 8–18 K. ΔS values of HoxEr1−xN expressed in terms of J K−1 m−3 were higher than those of intermetallic compounds of rare earth and transition metals previously reported. These ΔS peak plots are along a convex curve, which may indicate an interaction between the two components.

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Magnetic properties and magnetic-entropy change of MnFeP0.5As0.5−xSix(x=0–0.3) compounds

Journal of Applied Physics ◽

10.1063/1.2158969 ◽

2006 ◽

Vol 99 (8) ◽

pp. 08Q105 ◽

Cited By ~ 41

Author(s):

W. Dagula ◽

O. Tegus ◽

X. W. Li ◽

L. Song ◽

E. Brück ◽

...

Keyword(s):

Magnetic Properties ◽

Magnetic Entropy Change ◽

Entropy Change ◽

Magnetic Entropy

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High-temperature solvothermal synthesis and magnetic properties of nearly monodisperse CdCr2S4 nanocrystals

Journal of Materials Chemistry C ◽

10.1039/c5tc02727f ◽

2015 ◽

Vol 3 (46) ◽

pp. 12077-12082 ◽

Cited By ~ 6

Author(s):

Chao Pang ◽

Ling Gao ◽

Anurag Chaturvedi ◽

Ningzhong Bao ◽

Kazumichi Yanagisawa ◽

...

Keyword(s):

Magnetic Properties ◽

High Temperature ◽

Solvothermal Synthesis ◽

Magnetic Entropy Change ◽

Solvothermal Method ◽

Entropy Change ◽

Magnetic Entropy

Magnetic spinel CdCr2S4 nanocrystals have been synthesized using a high-temperature solvothermal method, which exhibit a large reversible magnetic entropy change over a wide temperature span.

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Magnetic Properties and Magnetocaloric Effect in Selected MM’X-Type (M, M’ = 3d or 4d Metal, X = As, P, Ge) and Mn1-xTxAs-Type (T = 3d Metal) Intermetallics

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.170.180 ◽

2011 ◽

Vol 170 ◽

pp. 180-184 ◽

Cited By ~ 1

Author(s):

Ryszard Zach ◽

Wiesław Chajec ◽

Janusz Toboła ◽

Daniel Fruchart ◽

El Kebir Hlil ◽

...

Keyword(s):

Magnetic Properties ◽

Phase Transitions ◽

Band Structure ◽

Magnetocaloric Effect ◽

Solid Solutions ◽

Magnetic Entropy Change ◽

Electronic Band Structure ◽

Entropy Change ◽

Magnetic Entropy ◽

Electronic Band

In this report a review of magnetic properties of two groups of intermetallic compounds in relation with their magnetocaloric effect properties is presented. A first group of materials concerns the MM’X type (M, M’-metal 3d or 4d, X = As, P, Ge) of compounds. In this group the MnRh1-xCoxAs and MnFe1-xCoxP series of solid solutions are investigated. In a second group of materials, the Mn1-xTxAs (T = Cr, V, Ti, (Ti0.5V0.5) ) series of compounds are analyzed. In this case a special attention is paid for high dc field magnetization measurements and for selected compounds. As a summary the magnetic entropy change vs. M, M’ or T transition metal concentration for F-P phase transitions will be shown. Furthermore results of KKR-CPA electronic band structure computations in relation to magnetic properties are discussed.

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