Perpendicular magnetization anisotropy induced dynamical coherence reduction in stripe domain film

Qiuyue Li; Yawen Song; Fangzhou Wang; Meihong Liu; Xiaoqi Ma; Xinfang Guo; Xiaowen Chen; Jing Yu; Shuai Du; Hao Li; Jie Xu; Shandong Li; Derang Cao

doi:10.1088/1361-648X/ac4e44

Perpendicular magnetization anisotropy induced dynamical coherence reduction in stripe domain film

J Phys Condens Matter. 2022 Feb 8;34(15). doi: 10.1088/1361-648X/ac4e44.

Authors

Qiuyue Li¹, Yawen Song¹, Fangzhou Wang², Meihong Liu¹, Xiaoqi Ma¹, Xinfang Guo¹, Xiaowen Chen¹, Jing Yu¹, Shuai Du¹, Hao Li³, Jie Xu¹, Shandong Li¹, Derang Cao¹

Affiliations

¹ College of Physics, National Demonstration Center for Experimental Applied Physics Education, Qingdao University, Qingdao 266071, People's Republic of China.
² Peter Grünberg Institute (PGI-6), Forschungszentrum Jülich, 52425 Jülich, Germany.
³ College of Chemical Engineering and Technology, Tianshui Normal University, Tianshui 741001, People's Republic of China.

PMID: 35073522
DOI: 10.1088/1361-648X/ac4e44

Abstract

We investigated the magnetization dynamics of the 350 nm permalloy film with in plane domain (IPD), stripe domain (SD), and labyrinth domain (LD) patterns. Experimental and micromagnetic simulation results showed that the change in magnetic domain structure from IPD to LD was due to the increasing perpendicular magnetic anisotropy (PMA) of the film. The magnetization dynamics indicated that the resonant modes of the film strongly depended on the magnetic domain structure. IPD films presented a uniform precession mode. The film with well-regular SD exhibited clear acoustic and optical resonance modes, and the formation of LD suppressed both resonance modes. Finally, the dynamics of magnetization dependent on the domain structure in these films were discussed by using the phenomenological resonance models.

Keywords: domain structures; magnetization dynamics; perpendicular magnetic anisotropy.