Preparation and Properties of SmTbCo Thin Films with Perpendicular Anisotropy

• 作 者: 黄致新 罗永松 刘敏 王辉 吴斌 章平 张玉龙
• 机 构: College of Physical Science and Technology Central China Normal University,College of Physical Scie
• 出 处: Journal of Rare Earths
• 发表日期: 2006年S2期
• 关键词: saturation sputtering anisotropy magnetization coercivity magnetron perpendicula

Amorphous (Sm)TbCo/Cr films with perpendicular anisotropy were prepared by r.f magnetron sputtering. The magnetic properties and the effects of Tb substituted with Sm on the magnetic properties of TbCo/Cr films were investigated. After part Tb substituted with Sm, the RE-TM alloy film possess large perpendicular anisotropy. The substitution effects on saturation magnetization can be explained with the ferri-magnetical structure of RE-TM alloy film. By choosing optimal sputtering parameters and suitable Sm substituting fraction, the anisotropy constant as high as 4.15×106 erg·cm-3, the saturation magnetization above 380 emu·cm-3 and the coercivity above 4.5 kOe can be obtained at room temperature for (SmxTb1-x)31Co69 films.

The magnetic properties and the effects of Tb substituted with Sm on the magnetic properties of TbCo / Cr films were investigated. After part Tb substituted with Sm, the RE -TM alloy film possess high perpendicular anisotropy. The substitution effects on saturation magnetization can be explained with the ferri-magnetical structure of RE-TM alloy film. By choosing optimal sputtering parameters and suitable Sm substituting fraction, the anisotropy constant as high as 4.15 × 106 erg · cm -3, the saturation magnetization above 380 emu · cm-3 and the coercivity above 4.5 kOe can obtained at room temperature for (SmxTb1-x) 31Co69 films.