Rotating field entropy change in hexagonal TmMnO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>single crystal with anisotropic paramagnetic response

Jin, Jin-Ling; Zhang, Xiang-Qun; Ge, Heng; Cheng, Zhao‐Hua

doi:10.1103/physrevb.85.214426

Cited by 70 publications

(34 citation statements)

References 24 publications

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“…In addition, as claimed by Barclay et al [18], a large scale utilization of hydrogen as a source of energy will result in better energy security with major environmental, economic, and social benefits. In this context, several cryomagnetocaloric materials have been proposed [19][20][21][22][23][24][25][26][27][28]. Following this, Matsumoto et al [29,30] unveiled a reciprocating magnetic refrigerator dedicated to hydrogen liquefaction that uses the Dy 2.4 Gd 0.6 Al 5 O 12 garnet as refrigerant.…”

Section: Introductionmentioning

confidence: 99%

Review of the Magnetocaloric Effect in RMnO3 and RMn2O5 Multiferroic Crystals

et al. 2017

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Abstract:It is known that some of RMnO 3 and RMn 2 O 5 (R = rare earth) multiferroic crystals reveal a strong interplay between their magnetic and electric order parameters, paving the way for applications in spintronic technologies. Additionally, recent works have also pointed out their potential utilization as refrigerants in magnetocaloric cooling systems for cryogenic tasks. In this paper, recent advances regarding the magnetocaloric properties of both RMnO 3 and RMn 2 O 5 families of multiferroics are reviewed. With the aim of understanding the RMnO 3 and RMn 2 O 5 magnetocaloric features, their structural and magnetic properties are discussed. The physics behind the magnetocaloric effect as well as some of its key thermodynamic aspects are also considered.

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Section: Introductionmentioning

confidence: 99%

Review of the Magnetocaloric Effect in RMnO3 and RMn2O5 Multiferroic Crystals

et al. 2017

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“…However, the search for materials with excellent magnetocaloric properties in the temperature range from about 2 to 30 K is of great interest from fundamental, practical, and economical points of view, due to their potential use as refrigerants in several low temperature applications such as the space industry, scientific instruments, and gas liquefaction [14][15][16][17][18][19][20][21][22][23][24][25]. On the other hand, the development of new designs that can render magnetic cooling more competitive is also a key parameter for the commercialization of this emergent technology.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Anisotropic Magnetocaloric Effect in RMn2O5 Single Crystals

et al. 2017

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Thanks to the strong magnetic anisotropy shown by the multiferroic RMn 2 O 5 (R = magnetic rare earth) compounds, a large adiabatic temperature change can be induced (around 10 K) by rotating them in constant magnetic fields instead of the standard magnetization-demagnetization method. Particularly, the TbMn 2 O 5 single crystal reveals a giant rotating magnetocaloric effect (RMCE) under relatively low constant magnetic fields reachable by permanent magnets. On the other hand, the nature of R 3+ ions strongly affects their RMCEs. For example, the maximum rotating adiabatic temperature change exhibited by TbMn 2 O 5 is more than five times larger than that presented by HoMn 2 O 5 in a constant magnetic field of 2 T. In this paper, we mainly focus on the physics behind the RMCE shown by RMn 2 O 5 multiferroics. We particularly demonstrate that the rare earth size could play a crucial role in determining the magnetic order, and accordingly, the rotating magnetocaloric properties of RMn 2 O 5 compounds through the modulation of exchange interactions via lattice distortions. This is a scenario that seems to be supported by Raman scattering measurements.

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“…A gradual increase in -∆S R (θ) can be seen as the magnetic field is rotated from the b to c axis and reaches a maximum value. In a field of 5 T, the maximum value of -∆S R (θ) is 9.7 J/kg K, which is comparable with or even large than those reported in some single crystals such as TbMnO 3 (9.2 J/kg K), 11 TmMnO 3 (5 J/kg K), 12 (10 J/kg K), 14 TmFeO 3 (9.0 J/kg K), 19 in similar temperature range. Magnetocrystalline anisotropy and thermal fluctuation are reported to contribute to the large rotating field entropy change.…”

Section: Resultsmentioning

confidence: 80%

“…Magnetocrystalline anisotropy and thermal fluctuation are reported to contribute to the large rotating field entropy change. 12,14 Following the coherent rotation (CR) model described in Ref. 11,12, we begin to discuss the origination of large rotating field entropy change in ErAlO 3 single crystal here.…”

Section: Resultsmentioning

confidence: 99%

“…The fitting values are much smaller than the experimental data, suggesting that an additional contribution to rotating field entropy change should be considered. Considering highly paramagnetic behavior of ErAlO 3 at 14 K like in TmMnO 3 , 12 we assume that thermal fluctuations may also contribute to the large rotating field entropy change of ErAlO 3 .…”

Section: Resultsmentioning

confidence: 99%

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Large rotating magnetocaloric effect in ErAlO3 single crystal

Zhang

et al. 2017

AIP Advances

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Large rotating magnetocaloric effect in ErAlO 3 single crystalMagnetic and magnetocaloric properties of ErAlO 3 single crystal were investigated. Magnetization of ErAlO 3 shows obvious anisotropy when magnetic field is applied along the a, b and c axes, which leads to large anisotropic magnetic entropy change. In particular, large rotating field entropy change from the b to c axis within the bc plane is obtained and reaches 9.7 J/kg K at 14 K in a field of 5 T. This suggests the possibility of using ErAlO 3 single crystal for magnetic refrigerators by rotating its magnetization vector rather than moving it in and out of the magnet. © 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license

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Rotating field entropy change in hexagonal TmMnO3single crystal with anisotropic paramagnetic response

Cited by 70 publications

References 24 publications

Review of the Magnetocaloric Effect in RMnO3 and RMn2O5 Multiferroic Crystals

Review of the Magnetocaloric Effect in RMnO3 and RMn2O5 Multiferroic Crystals

Analysis of the Anisotropic Magnetocaloric Effect in RMn2O5 Single Crystals

Large rotating magnetocaloric effect in ErAlO3 single crystal

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