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Title: Time-Resolved Magneto-Optical Kerr Effect of Magnetic Thin Films for Ultrafast Thermal Characterization
Author: Chen, Jun-Yang1; Zhu, Jie2, 3; Zhang, Delin1; Lottery, Dustin M.2; Li, Mo1; Wang, Jian-Ping1; Wang, Xiaojia2
Source: JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Issued Date: 2016-07-07
Volume: 7, Issue:13, Pages:2328-2332
DOI: 10.1021/acs.jpclett.6b00945
DOC Type: Article
English Abstract: Thermomagnetic and magneto-optical effects are two fundamental but unique phenomena existing in magnetic materials. In this work, we demonstrate ultrafast time-resolved magneto-optical Kerr effect (TR-MOKE) as an advanced thermal characterization technique by studying the original factors of the MOKE signal from four magnetic transducers, including TbFe, GdFeCo, Co/Pd, and CoFe/Pt. A figure of merit is proposed to evaluate the performance of the transducer layers, corresponding to the degree of the signal-to-noise ratio in TR-MOKE measurements. We observe improved figure of merit for rare-earth transition-metal-based TbFe and GdFeCo transducers and attribute this improvement to their relatively larger temperature-dependent magnetization and the Kerr rotation angle at the saturated magnetization state. Furthermore, an optimal thickness of TbFe is found to be similar to 18.5 nm to give the best performance. Our findings will facilitate the nanoscale thermal characterization and the device design where the thermo-magneto-optical coupling plays an important role.
WOS Headings: Science & Technology ; Physical Sciences ; Technology
WOS Subject: Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical
WOS Subject Extended: Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS Keyword Plus: TRANSITION-METAL ALLOYS ; THICKNESS DEPENDENCE ; FERROMAGNETIC-FILMS ; CONDUCTIVITY ; FE ; RESOLUTION ; SILICON ; SURFACE ; DEVICE ; CO/PT
Indexed Type: SCI
Funder: National Science Foundation (NSF) through the University of Minnesota MRSEC(DMR-1420013) ; National Natural Science Foundation of China(51336009 ; C-SPIN, one of six centers of STARnet, a Semiconductor Research Corporation program ; MARCO ; DARPA ; NSF through the NNIN program ; NSF through the UMN MRSEC program ; 51206167)
Language: 英语
WOS ID: WOS:000379457400006
Citation statistics:
Content Type: 期刊论文
URI: http://ir.etp.ac.cn/handle/311046/112485
Appears in Collections:中国科学院工程热物理所(论文库)_期刊论文(SCI)

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description.institution: 1.Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA
2.Univ Minnesota, Dept Mech Engn, 111 Church St SE, Minneapolis, MN 55455 USA
3.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
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