Effects of layer modulus on the phase evolutions and magnetic properties of [MgO/FePt]n multilayer thin films

作者：Hong, Y.; Zeng, Y. P.; Qiu, Z. G.^*; Zheng, Z. G.; Guo, J. P.; Chen, D. Y.; Xia, W. X.; Zeng, D. C.; Liu, J. P.

来源：Applied Physics A: Materials Science and Processing , 2022, 128(12): 1099.

DOI：10.1007/s00339-022-06237-x

• [MgO
• FePt](n) multilayer
• Layer modulus
• Magnetic properties
• L1(0)-FePt transformation

Multilayer structural system is expected to reduce demagnetization energy and obtain outstanding magnetic anisotropy. The effects of layer modulus (n) on the phase evolutions and magnetic properties of [MgO/FePt](n) multilayer thin films were systematically investigated. The low ordering parameters and coercivity when annealing at 600 degrees C indicated that the existence of the MgO phase would enhance the L1(0)-FePt transformation temperature. When annealing at 800 degrees C, the coercivity of 9 kOe with a superior in-plane magnetic anisotropy was obtained in [MgO/FePt](2) multilayer film. This multilayer film has reasonable exchange coupling interactions between the magnetic grains (alpha = 2.4) that could be utilized as an ideal candidate for micro-electro-mechanical systems (MEMS).

• 单位
  中国科学院宁波材料技术与工程研究所