兰州大学机构库 >物理科学与技术学院
Magnetization precession and damping in Co2FeSi Heusler alloy thin films
Zhu, Weihua1,2; Zhu, Zhendong1,2; Li, Dong3; Wu, Guanjie1,2; Xi, L(席力)3; Jin, Q. Y.1,2; Zhang, Zongzhi1,2
2019-06
Source PublicationJOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
ISSN0304-8853
Volume479Pages:179-184
AbstractMagnetization dynamics of Co2FeSi full Heusler alloy films have been investigated by time-resolved magneto-optical Kerr effect (TR-MOKE). For the samples grown at a substrate temperature (T-s) lower than 350 degrees C, an obvious dual frequency phenomenon is found in the TR-MOKE signals due to the coexistence of a strong main precession mode and a weak additional mode. The amplitude of the additional high frequency mode decreases and becomes undetectable with increasing T-s. On the contrary, the magnetic damping parameter alpha(0) measured at the highest external field of H = 15kOe is as low as 0.004 for low T-s samples, it rises abruptly at T-s > 350 degrees C and even reaches 0.023 at T-s = 480 degrees C in spite of the improved atomic ordering. We attribute the greatly increased magnetic damping to the enhanced two-magnon scattering occurred at grain-grain boundaries. This study provides a comprehensive insight into the spin precession and magnetic damping behaviors of Heusler alloy films, which will be helpful for developing high frequency spintronic devices.
DOI10.1016/j.jmmm.2019.01.087
Indexed BySCIE
Language英语
Funding ProjectNational Natural Science Foundation of China[11874120] ; National Natural Science Foundation of China[51671057] ; National Natural Science Foundation of China[11674095]
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Condensed Matter
WOS IDWOS:000459863200028
PublisherELSEVIER SCIENCE BV
Original Document TypeArticle
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/298440
Collection物理科学与技术学院
Corresponding AuthorZhang, Zongzhi
Affiliation1.Fudan Univ, Dept Opt Sci & Engn, Key Lab Micro & Nano Photon Struct, Minist Educ, Shanghai 200433, Peoples R China
2.Fudan Univ, Shanghai Ultraprecis Opt Mfg Engn Ctr, Shanghai 200433, Peoples R China
3.Lanzhou Univ, Key Lab Magnetism & Magnet Mat, Minist Educ, Sch Phys Sci & Technol, Lanzhou 730000, Gansu, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Weihua,Zhu, Zhendong,Li, Dong,et al. Magnetization precession and damping in Co2FeSi Heusler alloy thin films[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,2019,479:179-184.
APA Zhu, Weihua.,Zhu, Zhendong.,Li, Dong.,Wu, Guanjie.,Xi, Li.,...&Zhang, Zongzhi.(2019).Magnetization precession and damping in Co2FeSi Heusler alloy thin films.JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,479,179-184.
MLA Zhu, Weihua,et al."Magnetization precession and damping in Co2FeSi Heusler alloy thin films".JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 479(2019):179-184.
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