Direct observation of ultrafast magnetization dynamics in Co/Ni bit patterned media by time-resolved scanning Kerr microscopy

被引：0
|
作者：
Zhang, Wei [1 ,2 ,3 ]
He, Wei [1 ,2 ]
Lv, Qin-Li [1 ,2 ,4 ]
Cai, Jian-Wang [1 ,2 ,5 ]
Zhang, Xiang-Qun [1 ,2 ]
Cheng, Zhao-Hua [1 ,2 ,5 ,6 ]
机构：
[1] Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[3] Beihang Univ, Hangzhou Int Innovat Inst, Natl Key Lab Spintron, Hangzhou 311115, Peoples R China
[4] China Grinm Grp Co Ltd, Guobiao Beijing Testing & Certificat Co Ltd, Beijing 101407, Peoples R China
[5] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
[6] Songshan Lake Mat Lab, Dongguan 523808, Peoples R China
来源：
CHINESE PHYSICS B | 2025年 / 34卷 / 04期
基金：
中国国家自然科学基金;
关键词：
ultrafast spin dynamics; magneto-optical Kerr effect; micromagnetic simulations; 75.40.Gb; 75.78.Cd; 75.78.-n; DEMAGNETIZATION; ENHANCEMENT; ANISOTROPY;
D O I：
10.1088/1674-1056/adb67e
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Bit patterned recording (BPR) has attracted much attention due to its promising potential in achieving high densities in magnetic storage devices. The materials with strong perpendicular magnetic anisotropy (PMA) are always preferred in designing the BPR. Here, the patterned Co/Ni multilayers showing d-d hybridization induced PMA was studied. In particular, we record the ultrafast spin dynamics by means of time-resolved scanning magneto-optical Kerr effect (TRMOKE) microscopy. We are able to acquire the "snapshot" magnetic maps of the sample surface because of both the femtosecond temporal and submicrometer spatial resolution in our TRMOKE microscopy. Furthermore, the spatially inhomogeneous ultrafast demagnetization was observed in experiment, and this has been evidenced by simulations.
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页数：5
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