Magnetic anisotropy manipulation and interfacial coupling in Sm3Fe5O12 films and CoFe/Sm3Fe5O12 heterostructures

• Published in: 中国物理B（英文版） 2021-12, Vol.30 (12), p.660-668
• Main Authors: Lei Shen, Guanjie Wu, Tao Sun, Zhi Meng, Chun Zhou, Wenyi Liu, Kang Qiu, Zongwei Ma, Haoliang Huang, Yalin Lu, Zongzhi Zhang, Zhigao Sheng
• Format: Article
• Language: English
• ISSN: 1674-1056
• DOI: 10.1088/1674-1056/ac0040

The magnetic anisotropy manipulation in the Sm3Fe5O12 (SmIG) films and its effect on the interfacial spin coupling in the CoFe/SmIG heterostructures were studied carefully.By switching the orientation of the Gd3Ga5O12 substrates from(111) to (001),the magnetic anisotropy of obtained SmIG films shifts from in-plane to out-of-plane.Similar results can also be obtained in the films on Gd3Sc2Ga3O12 substrates,which identifies the universality of such orientation-induced magnetic anisotropy switching.Additionally,the interfacial spin coupling and magnetic anisotropy switching effect on the spin wave in CoFe/SmIG magnetic heterojunctions have also been explored by utilizing the time-resolved magneto-optical Kerr effect technique.It is intriguing to find that both the frequency and effective damping factor of spin precession in CoFe/SmIG heterojunctions can be manipulated by the magnetic anisotropy switching of SmIG films.These findings not only provide a route for the perpendicular magnetic anisotropy acquisition but also give a further path for spin manipulation in magnetic films and heterojunctions.