Magnetic properties of sputtered anisotropic Pr-Fe-B thin films with different structures and antife

• 作 者: Fang Yang Wei Liu Zhi-Dong Zhang
• 机 构: Shenyang National Laboratory for Materials Science,Institute of Metal Research and International Cen
• 出 处: Rare Metals
• 发表日期: 2016年12期
• 关键词: Magnetic materials Thin films Coercivity Hysteresis loop Sputtering

Anisotropic Pr–Fe–B films with soft-magnetic layer(Fe) and/or antiferromagnetic layer(Mn, Fe Mn or Mn O) were prepared by direct-current(DC) magnetron sputtering on Si(100) substrates heated at 650 °C. The influence of four types’ different structures on the magnetic properties of Pr–Fe–B films was investigated.The phase and magnetic properties were characterized by means of X-ray diffraction(XRD) and superconducting quantum interference device(SQUID). Addition of antiferromagnetic layer enhances both the coercivity and the remanence ratios of Pr–Fe–B films with suitable structures. The interface number increases and the antiferromagnetic–ferromagnetic exchange interaction is likely to become stronger, which affect the improvement of magnetic properties. To further understand the influence of structures with soft-magnetic Fe layer and/or antiferromagnetic Fe Mn layer on the magnetic properties of Pr–Fe–B hard-magnetic films, the thickness of Pr–Fe–B layer was designed to decrease from 600 to 50 nm. The improvement of magnetic properties becomes obvious in Mo(50 nm)/Pr–Fe–B(25 nm)Mo(2 nm)Fe Mn(20 nm)Mo(2 nm)Pr–Fe–B(25 nm)/Mo(50 nm) film.

Anisotropic Pr-Fe-B films with soft-magnetic layer (Fe) and / or antiferromagnetic layer (Mn, Fe Mn or Mn O) were prepared by direct-current magnetron sputtering on Si C. The influence of four types’ different structures on the magnetic properties of Pr-Fe-B films was investigated. The phase and magnetic properties were characterized by means of X-ray diffraction (XRD) and superconducting quantum interference device (SQUID). Addition of antiferromagnetic layer enhances both the coercivity and the remanence ratios of Pr-Fe-B films with suitable structures. The further increase of the antiferromagnetic-ferromagnetic exchange interaction is likely to become stronger, which affects the improvement of magnetic properties. understand the influence of structures with soft-magnetic Fe layer and / or antiferromagnetic Fe Mn layer on the magnetic properties of Pr-Fe-B hard-magnetic films, the thickness of Pr-Fe-B layer was des The improvement of magnetic properties becomes apparent in Mo (50 nm) / Pr-Fe-B (25 nm) Mo (2 nm) Fe Mn (20 nm) Mo Fe-B (25 nm) / Mo (50 nm) film.