Magnetic properties of Fe/Tb multilayered films studied by Mössbauer spectroscopy

Scholz, Bernhard; Brand, Richard A.; Keune, W.; Kirschbaum, U.; Wassermann, E.F.; Mibu, Ko; Shinjo, Teruya

doi:10.1016/0304-8853(91)90393-o

Cited by 18 publications

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“…Very few investigations using the Mössbauer spectrometry were performed on amorphous Fe/Tb multilayers and the results concerned only one or two samples. 6,14 This is very surprising because the amorphous Fe/Tb multilayers exhibit a strong PMA at room temperature. 11,15 Here, we report on the structural and magnetic properties of Fe/Tb multilayers using x-ray diffraction ͑XRD͒, 57 Fe conversion electron Mössbauer spectrometry ͑CEMS͒ and magnetization measurements in the 4.2-300 K temperature range.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the structural and magnetic properties of Fe/Tb multilayers

et al. 1996

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Sputtered Fe/Tb multilayers of various Fe and Tb thicknesses ͑0.22рt Fe р3.3 nm, 0.2рt Tb р1.9 nm͒ have been investigated by x-ray diffraction, Mössbauer spectrometry, and magnetic measurements in the 4.2-300 K temperature range. A compositionally modulated structure is shown with the appearance of pure amorphous iron in the center of the Fe layers thicker than 1.2 nm. When the Fe layers are thick enough ͑у2.2-2.4 nm͒, the Fe layers will crystallize. The magnetic properties ͑M ,T comp ,T c ,...͒ were analyzed in relation with Fe and Tb thicknesses and also with mean Tb composition. In agreement with the structure, the departure of magnetic properties from those of the corresponding amorphous alloys is observed when pure amorphous iron appears in the center of the layers. The dependence of the magnetic anisotropy axis on temperature and thicknesses is interpreted taking into account the composition modulation in the multilayers and the dominant magnetic subnetwork.

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