亚铁磁Er(Co1-xFex)2的宽温域磁热效应
Magnetocaloric Effect in Er(Co1-xFex)2 Ferrimagnetic Compound with Wide Operating Temperature
DOI: 10.12677/APP.2019.912063, PDF,  被引量    国家自然科学基金支持
作者: 刘懿德*, 时阳光：南京航空航天大学理学院，江苏 南京
关键词: 磁热效应；Laves相；相变；Magnetocaloric Effect； Laves Phase； Phase Transition
摘要: 采用电弧熔炼和后续真空热处理的方法制备了Er(Co1-xFex)2 (x = 0,0.1,0.16,0.2) Laves单相合金，对该系列合金的结构、相变类型和磁热效应进行了系统实验研究。实验结果显示Er(Co1-xFex)2的居里温度随Fe含量的增加而增高，并在x = 0.16时达到室温附近。结合Banerjee判据和Inoue-Shimizu模型对该系列合金的相变类型进行分析，结果表明Fe的引入使ErCo2的相变类型由一级相变转变为二级相变。此外，基于Maxwell方程对该系列合金的熵变进行了计算，结果表明Er(Co0.9Fe0.1)2的熵变值随着温度的降低在亚铁磁–铁磁转变点实现了峰值。而当x ≥ 0.16时，材料的熵变值随着温度的降低而逐渐升高，并在一个较宽的温域保持了一个较大的熵变。我们认为这一非常规的熵变曲线与Er(Co1-xFex)2中的稀土和过渡金属的亚铁磁耦合有关。本文的研究提供了一种利用亚铁磁材料的相变获取宽温域磁制冷材料的新思路。
Abstract: Er(Co1-xFex)2 (x = 0,0.1,0.16,0.2) Laves compounds were prepared by arc-melting and subsequent annealing. The phase structure, magnetocaloric effect (MCE) and transition order of these com-pounds were studied. It is found that the Curie temperature (Tc) increases with increasing Fe. The TC of the ErCo2 (42 K) was tuned to 289 K with 10 at.% of Fe substituting for Co. Banerjee criterion and the Inoue-Shimizu model were employed to confirm the transition order of the compound. The presence of Fe in ErCo2 results in a change of phase transition order from the first one into the second one. The magnetic entropy change (-ΔS) of the Er(Co1-xFex)2 alloys was also calculated by Maxwell equation. The -ΔS of Er(Co0.9Fe0.1)2 shows a peak around its phase transition temperature. By contrast, the -ΔS of the compounds with x ≥ 0.16 increases with decreasing temperature, which presents an abnormal behavior. Such a behavior is associated with the ferrimagnetic coupling of Er and Fe, Co. The present work may provide a novel strategy of designing refrigerant materials with wide operating temperature.
文章引用：刘懿德, 时阳光. 亚铁磁Er(Co1-xFex)2的宽温域磁热效应[J]. 应用物理, 2019, 9(12): 511-517. https://doi.org/10.12677/APP.2019.912063

参考文献

[1] Smith, A., Bahl, C.R., Bjørk, R., Engelbrecht, K., Nielsen, K.K. and Pryds, N. (2012) Materials Challenges for High Performance Magnetocaloric Refrigeration Devices. Advanced Energy Materials, 2, 1288-1318. [Google Scholar] [CrossRef] 
[2] GschneidnerJr, K.A., Pecharsky, V.K. and Tsokol, A.O. (2005) Recent Developments in Magnetocaloric Materials. Reports on Progress in Physics, 68, 1479. [Google Scholar] [CrossRef] 
[3] Shen, B.G., Sun, J.R., Hu, F.X., Zhang, H.W. and Cheng, Z.H. (2009) Recent Progress in Exploring Magnetocaloric Materials. Advanced Materials, 21, 4545-4564. [Google Scholar] [CrossRef] 
[4] Gutfleisch, O., Willard, M.A., Brück, E., Chen, C.H., Sankar, S.G. and Liu, J.P. (2011) Magnetic Materials and Devices for the 21st Century: Stronger, Lighter, and More Energy Efficient. Advanced Materials, 23, 821-842. [Google Scholar] [CrossRef] [PubMed]
[5] Liu, J., Gottschall, T., Skokov, K.P., Moore, J.D. and Gutfleisch, O. (2012) Giant Magnetocaloric Effect Driven by Structural Transitions. Nature Materials, 11, 620. [Google Scholar] [CrossRef] [PubMed]
[6] Zheng, W.G., Cui, Y., Chen, F.H., Shi, Y.G. and Shi, D.N. (2018) Magnetocaloric Effect in Nd (Co0.8Fe0.2)2 Laves Compound with Wide Operating Temperature. Journal of Magnetism and Magnetic Materials, 460, 137-140. [Google Scholar] [CrossRef] 
[7] Ma, S., Cui, W.B., Li, D., Sun, N.K., Geng, D.Y., Jiang, X. and Zhang, Z.D. (2008) Large Cryogenic Magnetocaloric Effect of DyCo2 Nanoparticles without Encapsulation. Applied Physics Letters, 92, Article ID: 173113. [Google Scholar] [CrossRef] 
[8] Herrero-Albillos, J., Bartolomé, F., García, L.M., Casanova, F., Labarta, A. and Batlle, X. (2006) Nature and Entropy Content of the Ordering Transitions in RCo2. Physical Review B, 73, Article ID: 134410. [Google Scholar] [CrossRef] 
[9] Singh, N.K., Tripathy, S.K., Banerjee, D., Tomy, C.V., Suresh, K.G. and Nigam, A.K. (2004) Effect of Si Substitution on the Magnetic and Magnetocaloric Properties of ErCo2. Journal of Applied Physics, 95, 6678-6680. [Google Scholar] [CrossRef] 
[10] Burzo, E., Pop, I.G. and Kozlenko, D.N. (2010) Magnetic and Magnetocaloric Properties of Some Ferrimagnetic Compounds. Journal of Optoelectronics and Advanced Materials, 12, 1105. [Google Scholar] [CrossRef] 
[11] Dunhui, W., Shaolong, T., Songling, H., Zhenghua, S., Zhida, H. and Youwei, D. (2003) The Origin of the Large Magnetocaloric Effect in RCo2 (R = Er, Ho and Dy). Journal of Alloys and Compounds, 360, 11-13. [Google Scholar] [CrossRef] 
[12] Han, Z., Hua, Z., Wang, D., Zhang, C., Gu, B. and Du, Y. (2006) Magnetic Properties and Magnetocaloric Effect in Dy (Co1−xFex)2 Alloys. Journal of Magnetism and Magnetic Materials, 302, 109-112. [Google Scholar] [CrossRef] 
[13] Hu, F., Shen, F., Hao, J., Liu, Y., Wang, J., Sun, J. and Shen, B. (2018) Negative Thermal Expansion in the Materials with Giant Magnetocaloric Effect. Frontiers in Chemistry, 6. [Google Scholar] [CrossRef] [PubMed]
[14] Balli, M., Fruchart, D. and Gignoux, D. (2011) Magnetic Behaviour and Experimental Study of the Magnetocaloric Effect in the Pseudobinary Laves Phase Er1−xDyxCo2. Journal of Alloys and Compounds, 509, 3907-3912. [Google Scholar] [CrossRef] 
[15] Gratz, E. and Markosyan, A.S. (2001) Physical Properties of RCo2 Laves Phases. Journal of Physics: Condensed Matter, 13, R385. [Google Scholar] [CrossRef] 
[16] Shi, Y.G., Xu, L.S., Zhou, X.G., Chen, Z.Y., Zheng, T.F. and Shi, D.N. (2013) Magnetostructural Phase Transition in Ga-Doped MnNiGe Compounds. Physica Status Solidi (a), 210, 2575-2578. [Google Scholar] [CrossRef] 
[17] Chaaba, I., Othmani, S., Haj-Khlifa, S., de Rango, P., Fruchart, D., Cheikhrouhou-Koubaa, W. and Cheikhrouhou, A. (2017) Magnetic and Magnetocaloric Properties of Er(Co1−xFex)2 Intermetallic Compounds. Journal of Magnetism and Magnetic Materials, 439, 269-276. [Google Scholar] [CrossRef] 
[18] Liu, J., He, C., Zhang, M.X. and Yan, A.R. (2016) A Systematic Study of the Microstructure, Phase Formation and Magnetocaloric Properties in Off-Stoichiometric La-Fe-Si Alloys. Acta Materialia, 118, 44-53. [Google Scholar] [CrossRef] 
[19] Slater, J.C. (1964) Atomic Radii in Crystals. The Journal of Chemical Physics, 41, 3199-3204. [Google Scholar] [CrossRef] 
[20] Rietveld, H. (1969) A Profile Refinement Method for Nuclear and Magnetic Structures. Journal of applied Crystallography, 2, 65-71. [Google Scholar] [CrossRef] 
[21] Fujita, A., Akamatsu, Y. and Fukamichi, K. (1999) Itinerant Electron Metamagnetic Transition in La(FexSi1−x)13 Intermetallic Compounds. Journal of Applied Physics, 85, 4756-4758. [Google Scholar] [CrossRef] 
[22] 王冬梅, 松林, 王耀辉, 等. MnFeP0.63Ge0.12Si0.25Bx (x = 0, 0.01, 0.02, 0.03)化合物的磁热效应[J]. 金属学报, 2011, 47(3): 344-348.
[23] Zheng, T.F., Shi, Y.G., Hu, C.C., Fan, J.Y., Shi, D.N., Tang, S.L. and Du, Y.W. (2012) Magnetocaloric Effect and Transition Order of Mn5Ge3 Ribbons. Journal of Magnetism and Magnetic Materials, 324, 4102-4105. [Google Scholar] [CrossRef] 
[24] Inoue, J. and Shimizu, M. (1988) First- and Second-Order Magnetic Phase Transitions in (RY) Co2 and R(Co-Al)2 (R = Heavy Rare-Earth Element) Compounds. Journal of Physics F: Metal Physics, 18, 2487. [Google Scholar] [CrossRef] 
[25] Brommer, P.E. (1989) A Generalization of the Inoue-Shimizu Model. Physica B: Condensed Matter, 154, 197-202. [Google Scholar] [CrossRef] 
[26] Gschneidner Jr., K.A. and Pecharsky, V.K. (2000) Magnetocaloric Materials. Annual Review of Materials Science, 30, 387-429. [Google Scholar] [CrossRef] 

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