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Microwave and magneto-optic properties of pulsed laser deposited bismuth iron garnet films

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6 Author(s)
Jalali-Roudsar, A.A. ; Dept. of Condensed Matter Phys., R. Inst. of Technol., Stockholm, Sweden ; Denysenkov, V.P. ; Khartsev, S.I. ; Grishin, A.M.
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We report on processing and comparative characterization of epitaxial Bi3Fe5O12 (BIG) films grown by pulsed laser ablation of a precursor oxide target onto (NdGd)3 (ScGa)5O12 [NGSGG(111)] and Gd3(ScGa)5O12 [GSGG(001)] single crystals. Comprehensive X-ray diffraction analyses reveal the epitaxial quality of the BIG films: they are single phase, exclusively (111) and (001) oriented with less than 0.4° and 0.06° of the full width at half maximum of the rocking curve of main texture Bragg reflection [(111) for NGSGG and (001) for GSGC substrate, respectively]. The films are strongly in-plane textured with cube-on-cube film-to-substrate epitaxial relationship. VSM and ferromagnetic resonance measurements revealed in-plane magnetization in BIG/GSCG(001) film, while the BIG/NGSGG(111) film was found to have perpendicular magnetization. For BIG(001) and (111) films the saturation magnetization 4πMs was found to be 1400 and 1200 Gs; the Faraday rotation at 635 nm was -7.8 and -6.7 deg/μm; the constant of uniaxial magnetic anisotropy was Ku*=-8.70×104 and +1.16×104 erg/cm3; the constant of cubic magnetic anisotropy K 1=-3.6×103 and -7.14×103 erg/cm3. High Faraday rotation and low coercive field (⩽40 Oe) of BIG/GSGG(001) films show promise for their use in integrated magneto-optic applications

Published in:

Magnetics, IEEE Transactions on  (Volume:37 ,  Issue: 4 )

Date of Publication:

Jul 2001

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