THE FUNCTIONS OF AL IN MNBIALSI MAGNETOOPTICAL FILMS

This article reports the effect of Al doping into MnBiSi films on the structure and magneto-optical properties of the parent. Under suitable Al doping, the x-ray diffraction peaks of (002) and (004) move to a larger 2THETA value related to that of MnBiSi. Moreover, two satellite peaks appear beside the main (002) and (004) peaks of MnBiAlSi. Such structural distortion due to Al doping results in an increased Kerr rotation angle, an effective perpendicular anisotropy constant K(u), as well as improvement of the thermal stability of MnBiSi.