This paper describes an

57

Fe conversion electron Mössbauer spectrcscopic study of small bubble diameter material. The nominal composition of the film is (YLuBi)

3

-(FeGa)

5

O

12

. After a dosage of 5×10

13

to 1×10

14

cm

-2

100 keV Ne

+

implantation

peaks of 2 and 5 of CEMS are emerged

indicating that the magnetization vector M

s

of the surface layer of the film is toward the film plane. It was found that the stress induced magnetic plannar anisotropy owing to the dosage of ion implantation is not necessary to be very large. While d=2×10

14

cm

-2

only paramagnetic spectra are obtained but the and d site spectrum is distinguishable. When d≥7×10

13

cm

-2

hard bubbles are suppressed. High temperature 1050℃ annealling is required to restore the hyperfine field to the value in the as-grown state

however

peaks 2 and 5 are present in the spectra and hard bubbles are still suppressed.