铁磁/反铁磁双层薄膜中应力各向异性研究

采用铁磁共振方法,研究了铁磁/反铁磁双层薄膜中交换各向异性和应力各向异性对其物理性质的影响.结果表明,单向各向异性来源于界面交换作用,应力各向异性对材料的磁化难易程度有较大影响.当外磁场方向与应力场方向平行时,应力场的存在将促进该方向的磁化.反之,应力场将会阻碍该方向的磁化.

Study on stress anisotropy in a ferromagnetic and antiferromagnetic bilayer films

The effect of exchange anisotropy and stress anisotropy on properties of a ferromagnetic and antiferromagnetic bilayer films are investigated by using ferromagnetic resonance method.It is shown that exchange anisotropy results from the unidirectional anisotropy.And stress anisotropy has large effect on hard or easy magnetization direction.Resonance frequency is shifted to high or low value,lindwidth is broaden or sharpen depend on angle of external magnetic field.When external magnetic field direction and stress field direction are parallel,the existence of stress field will accelerate the magnetization of this direction.On the contrary,it will block the magnetization of that direction.