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Intense ferromagnetic fluctuations preceding magnetoelastic first-order transitions in giant magnetocaloric LaFe13-xSix

文献类型：期刊论文

作者Zhang, Zhao3,4; Zhou, Houbo2,5,6; Mole, Richard1; Yu, Chenyang3,4; Zhang, Zhe3,4; Zhao, Xinguo3; Ren, Weijun3; Yu, Dehong1; Li, Bing3,4; Hu, Fengxia2,5,6
刊名PHYSICAL REVIEW MATERIALS
出版日期2021-07-22
卷号5期号:7页码:6
ISSN号2475-9953
DOI10.1103/PhysRevMaterials.5.L071401
通讯作者Yu, Dehong(dyu@ansto.gov.au) ; Li, Bing(bingli@imr.ac.cn) ; Hu, Fengxia(fxhu@iphy.ac.cn)
英文摘要First-order magnetic transitions are of both fundamental and technological interest given that a number of emergent phases and functionalities are thereby created. Of particular interest are giant magnetocaloric effects, which are attributed to first-order magnetic transitions and have attracted broad attention for solid-state refrigeration applications. While the conventional wisdom is that atomic lattices play an important role in first-order magnetic transitions, a coherent microscopic description of the lattice and spin degrees of freedom is still lacking. Here, we present a comparative neutron scattering study on the lattice and spin dynamics in intermetallic LaFe11.6Si1.4 and LaFe11.2Si1.8, which represent one of the most classical giant magnetocaloric systems and undergo first-order and second-order magnetic transitions, respectively. While their spin-phonon coupling effects are quite similar, LaFe11.6Si1.4 exhibits a much stronger magnetic diffuse scattering in the paramagnetic state preceding its first-order magnetic transition, corresponding to intense ferromagnetic fluctuations. These dynamic insights suggest that the magnetic degree of freedom dominates this magnetoelastic transition and ferromagnetic fluctuations might be universally relevant for this kind of compounds.
资助项目Ministry of Science and Technology of China[2020YFA0406001] ; Ministry of Science and Technology of China[2019YFA0704900] ; Key Research Program of Frontier Sciences of Chinese Academy of Sciences[ZDBS-LY-JSC002] ; Liaoning Revitalization Talents Program[XLYC1807122] ; National Natural Science Foundation of China[51771197] ; National Natural Science Foundation of China[U1832219]
WOS研究方向Materials Science
语种英语
出版者AMER PHYSICAL SOC
WOS记录号WOS:000679196200003
资助机构Ministry of Science and Technology of China ; Key Research Program of Frontier Sciences of Chinese Academy of Sciences ; Liaoning Revitalization Talents Program ; National Natural Science Foundation of China
源URL[http://ir.imr.ac.cn/handle/321006/159334]  
专题金属研究所_中国科学院金属研究所
通讯作者Yu, Dehong; Li, Bing; Hu, Fengxia
作者单位1.Australian Nucl Sci & Technol Org, Locked Bag 2001, Kirrawee Dc, NSW 2232, Australia
2.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
4.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
5.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
6.Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Zhao,Zhou, Houbo,Mole, Richard,et al. Intense ferromagnetic fluctuations preceding magnetoelastic first-order transitions in giant magnetocaloric LaFe13-xSix[J]. PHYSICAL REVIEW MATERIALS,2021,5(7):6.
APA Zhang, Zhao.,Zhou, Houbo.,Mole, Richard.,Yu, Chenyang.,Zhang, Zhe.,...&Zhang, Zhidong.(2021).Intense ferromagnetic fluctuations preceding magnetoelastic first-order transitions in giant magnetocaloric LaFe13-xSix.PHYSICAL REVIEW MATERIALS,5(7),6.
MLA Zhang, Zhao,et al."Intense ferromagnetic fluctuations preceding magnetoelastic first-order transitions in giant magnetocaloric LaFe13-xSix".PHYSICAL REVIEW MATERIALS 5.7(2021):6.

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来源：金属研究所

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