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Intense ferromagnetic fluctuations preceding magnetoelastic first-order transitions in giant magnetocaloric LaFe13-xSix
Zhang, Zhao1,2; Zhou, Houbo3,4,5; Mole, Richard6; Yu, Chenyang1,2; Zhang, Zhe1,2; Zhao, Xinguo1; Ren, Weijun1; Yu, Dehong6; Li, Bing1,2; Hu, Fengxia3,4,5; Shen, Baogen3,4,5; Zhang, Zhidong1,2
Corresponding AuthorYu, Dehong(dyu@ansto.gov.au) ; Li, Bing(bingli@imr.ac.cn) ; Hu, Fengxia(fxhu@iphy.ac.cn)
2021-07-22
Source PublicationPHYSICAL REVIEW MATERIALS
ISSN2475-9953
Volume5Issue:7Pages:6
AbstractFirst-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.
Funding OrganizationMinistry 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
DOI10.1103/PhysRevMaterials.5.L071401
Indexed BySCI
Language英语
Funding ProjectMinistry 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 Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000679196200003
PublisherAMER PHYSICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/159335
Collection中国科学院金属研究所
Corresponding AuthorYu, Dehong; Li, Bing; Hu, Fengxia
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
3.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
4.Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100190, Peoples R China
5.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
6.Australian Nucl Sci & Technol Org, Locked Bag 2001, Kirrawee Dc, NSW 2232, Australia
Recommended Citation
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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